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	<title>Chemiomet[R]ia</title>
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		<title>Chemiomet[R]ia</title>
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		<title>Gruppo di R in chemiometria</title>
		<link>http://chemiometria.wordpress.com/2011/09/16/gurppo-di-r-in-chemiometria/</link>
		<comments>http://chemiometria.wordpress.com/2011/09/16/gurppo-di-r-in-chemiometria/#comments</comments>
		<pubDate>Fri, 16 Sep 2011 14:21:53 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://chemiometria.wordpress.com/?p=99</guid>
		<description><![CDATA[ciao a tutti, da oggi è nato un gruppo di lavoro sull&#8217;uso di R in chemiometria. Invito chiunque fosse interessato a partecipare (o fosse anche solo curioso) ad andare su questa pagina. Il gruppo fa parte del Gruppo di Chemiometria della Divisione di Chimica Analitica della Società Chimica Italiana. Filed under: Uncategorized<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=99&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>ciao a tutti, da oggi è nato un gruppo di lavoro sull&#8217;uso di R in <a href="http://www.chemiometria.it" target="_blank">chemiometria</a>. Invito chiunque fosse interessato a partecipare (o fosse anche solo curioso) ad andare su <a href="http://www.gruppochemiometria.it/grupporchemiometria.html" target="_blank">questa pagina</a>. Il gruppo fa parte del Gruppo di Chemiometria della Divisione di Chimica Analitica della Società Chimica Italiana.</p>
<br />Filed under: <a href='http://chemiometria.wordpress.com/category/uncategorized/'>Uncategorized</a>  <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/chemiometria.wordpress.com/99/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/chemiometria.wordpress.com/99/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/chemiometria.wordpress.com/99/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/chemiometria.wordpress.com/99/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/chemiometria.wordpress.com/99/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/chemiometria.wordpress.com/99/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/chemiometria.wordpress.com/99/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/chemiometria.wordpress.com/99/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/chemiometria.wordpress.com/99/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/chemiometria.wordpress.com/99/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/chemiometria.wordpress.com/99/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/chemiometria.wordpress.com/99/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/chemiometria.wordpress.com/99/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/chemiometria.wordpress.com/99/" /></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=99&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></content:encoded>
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			<media:title type="html">marcocalderisi</media:title>
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		<item>
		<title>Ma quanto R è scritto in R?</title>
		<link>http://chemiometria.wordpress.com/2011/08/30/ma-quanto-r-e-scritto-in-r/</link>
		<comments>http://chemiometria.wordpress.com/2011/08/30/ma-quanto-r-e-scritto-in-r/#comments</comments>
		<pubDate>Tue, 30 Aug 2011 12:12:59 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[R]]></category>
		<category><![CDATA[programming]]></category>

		<guid isPermaLink="false">http://chemiometria.wordpress.com/?p=95</guid>
		<description><![CDATA[L&#8217;ingenuo utilizzatore di R, magari un chimico (come me) o un biologo&#8230;o qualcos&#8217;altro, potrebbe essere portato a pensare che R sia scritto in R&#8230;ed invece no, o meglio, si, ma non del tutto. Come si vede in questi due simpatici post nel blog di librestats, sia il core di R, sia i contributed packages sono [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=95&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>L&#8217;ingenuo utilizzatore di R, magari un chimico (come me) o un biologo&#8230;o qualcos&#8217;altro, potrebbe essere portato a pensare che R sia scritto in R&#8230;ed invece no, o meglio, si, ma non del tutto. Come si vede in questi due simpatici post nel blog di <a href="http://librestats.wordpress.com/" target="_blank">librestats</a>, sia <a href="http://librestats.wordpress.com/2011/08/27/how-much-of-r-is-written-in-r/" target="_blank">il core di R</a>, sia <a href="http://librestats.wordpress.com/2011/08/29/how-much-of-r-is-written-in-r-part-2-contributed-packages/" target="_blank">i contributed packages</a> sono scritti in gran parte in C/C++ !!!</p>
<br />Filed under: <a href='http://chemiometria.wordpress.com/category/r/'>R</a> Tagged: <a href='http://chemiometria.wordpress.com/tag/programming/'>programming</a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/chemiometria.wordpress.com/95/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/chemiometria.wordpress.com/95/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/chemiometria.wordpress.com/95/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/chemiometria.wordpress.com/95/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/chemiometria.wordpress.com/95/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/chemiometria.wordpress.com/95/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/chemiometria.wordpress.com/95/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/chemiometria.wordpress.com/95/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/chemiometria.wordpress.com/95/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/chemiometria.wordpress.com/95/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/chemiometria.wordpress.com/95/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/chemiometria.wordpress.com/95/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/chemiometria.wordpress.com/95/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/chemiometria.wordpress.com/95/" /></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=95&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></content:encoded>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">marcocalderisi</media:title>
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	</item>
		<item>
		<title>Correlazione e causa-effetto</title>
		<link>http://chemiometria.wordpress.com/2011/07/29/91/</link>
		<comments>http://chemiometria.wordpress.com/2011/07/29/91/#comments</comments>
		<pubDate>Fri, 29 Jul 2011 14:53:30 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[correlazione]]></category>
		<category><![CDATA[linear regression]]></category>
		<category><![CDATA[R]]></category>
		<category><![CDATA[APA]]></category>
		<category><![CDATA[causa effetto]]></category>
		<category><![CDATA[correlation]]></category>
		<category><![CDATA[SPSS]]></category>

		<guid isPermaLink="false">http://chemiometria.wordpress.com/?p=91</guid>
		<description><![CDATA[In questo post, Correlation Resources: SPSS, R, Causality, Interpretation and APA Style Reporting, scritto da Jeromy Anglim, ci fornisce numerosi collegamenti a risorse relative all&#8217;uso e all&#8217;interpretazione della correlazione e del rapporto causa-effetto e ci aiuta a gettare un po&#8217; di luce sull&#8217;argomento. Filed under: correlazione, linear regression, R Tagged: APA, causa effetto, correlation, R, [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=91&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>In questo post, <a href="http://www.r-bloggers.com/correlation-resources-spss-r-causality-interpretation-and-apa-style-reporting/?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+RBloggers+%28R+bloggers%29" target="_blank">Correlation Resources: SPSS, R, Causality, Interpretation and APA Style Reporting</a>, scritto da <a href="http://www.r-bloggers.com/author/jeromy-anglim/" target="_blank">Jeromy Anglim</a>, ci fornisce numerosi collegamenti a risorse relative all&#8217;uso e all&#8217;interpretazione della correlazione e del rapporto causa-effetto e ci aiuta a gettare un po&#8217; di luce sull&#8217;argomento.</p>
<br />Filed under: <a href='http://chemiometria.wordpress.com/category/correlazione/'>correlazione</a>, <a href='http://chemiometria.wordpress.com/category/linear-regression/'>linear regression</a>, <a href='http://chemiometria.wordpress.com/category/r/'>R</a> Tagged: <a href='http://chemiometria.wordpress.com/tag/apa/'>APA</a>, <a href='http://chemiometria.wordpress.com/tag/causa-effetto/'>causa effetto</a>, <a href='http://chemiometria.wordpress.com/tag/correlation/'>correlation</a>, <a href='http://chemiometria.wordpress.com/tag/r/'>R</a>, <a href='http://chemiometria.wordpress.com/tag/spss/'>SPSS</a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/chemiometria.wordpress.com/91/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/chemiometria.wordpress.com/91/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/chemiometria.wordpress.com/91/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/chemiometria.wordpress.com/91/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/chemiometria.wordpress.com/91/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/chemiometria.wordpress.com/91/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/chemiometria.wordpress.com/91/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/chemiometria.wordpress.com/91/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/chemiometria.wordpress.com/91/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/chemiometria.wordpress.com/91/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/chemiometria.wordpress.com/91/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/chemiometria.wordpress.com/91/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/chemiometria.wordpress.com/91/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/chemiometria.wordpress.com/91/" /></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=91&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></content:encoded>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">marcocalderisi</media:title>
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		<item>
		<title>Visualizzare dati multivariati</title>
		<link>http://chemiometria.wordpress.com/2011/07/29/visualizzare-dati-multivariati/</link>
		<comments>http://chemiometria.wordpress.com/2011/07/29/visualizzare-dati-multivariati/#comments</comments>
		<pubDate>Fri, 29 Jul 2011 14:46:27 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[infografica]]></category>
		<category><![CDATA[multivariate data analysis]]></category>
		<category><![CDATA[plot]]></category>
		<category><![CDATA[R]]></category>
		<category><![CDATA[corrgram]]></category>
		<category><![CDATA[psych]]></category>
		<category><![CDATA[visualization]]></category>

		<guid isPermaLink="false">http://chemiometria.wordpress.com/?p=87</guid>
		<description><![CDATA[In questo interessante post, Getting to know multivariate data, J.S.A. Bridgewater ci mostra come visualizzare dati multivariati. Passaggio molto utile non solo nella preparazione all&#8217;analisi multivariata vera e propria, ma anche per controllare, verificare e rendere più comprensibili i risultati che si ottengono. Filed under: infografica, multivariate data analysis, plot, R Tagged: corrgram, plot, psych, [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=87&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>In questo interessante post, <a href="http://bridgewater.wordpress.com/2011/07/25/91/" target="_blank">Getting to know multivariate data</a>, J.S.A. Bridgewater ci mostra come visualizzare dati multivariati. Passaggio molto utile non solo nella preparazione all&#8217;analisi multivariata vera e propria, ma anche per controllare, verificare e rendere più comprensibili i risultati che si ottengono.</p>
<br />Filed under: <a href='http://chemiometria.wordpress.com/category/infografica/'>infografica</a>, <a href='http://chemiometria.wordpress.com/category/multivariate-data-analysis/'>multivariate data analysis</a>, <a href='http://chemiometria.wordpress.com/category/plot/'>plot</a>, <a href='http://chemiometria.wordpress.com/category/r/'>R</a> Tagged: <a href='http://chemiometria.wordpress.com/tag/corrgram/'>corrgram</a>, <a href='http://chemiometria.wordpress.com/tag/plot/'>plot</a>, <a href='http://chemiometria.wordpress.com/tag/psych/'>psych</a>, <a href='http://chemiometria.wordpress.com/tag/visualization/'>visualization</a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/chemiometria.wordpress.com/87/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/chemiometria.wordpress.com/87/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/chemiometria.wordpress.com/87/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/chemiometria.wordpress.com/87/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/chemiometria.wordpress.com/87/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/chemiometria.wordpress.com/87/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/chemiometria.wordpress.com/87/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/chemiometria.wordpress.com/87/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/chemiometria.wordpress.com/87/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/chemiometria.wordpress.com/87/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/chemiometria.wordpress.com/87/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/chemiometria.wordpress.com/87/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/chemiometria.wordpress.com/87/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/chemiometria.wordpress.com/87/" /></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=87&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></content:encoded>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">marcocalderisi</media:title>
		</media:content>
	</item>
		<item>
		<title>Word Cloud again</title>
		<link>http://chemiometria.wordpress.com/2011/07/29/word-cloud-again/</link>
		<comments>http://chemiometria.wordpress.com/2011/07/29/word-cloud-again/#comments</comments>
		<pubDate>Fri, 29 Jul 2011 14:37:55 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[infografica]]></category>
		<category><![CDATA[plot]]></category>
		<category><![CDATA[R]]></category>
		<category><![CDATA[text]]></category>
		<category><![CDATA[text plot]]></category>
		<category><![CDATA[visualization]]></category>
		<category><![CDATA[word cloud]]></category>
		<category><![CDATA[wordcloud]]></category>

		<guid isPermaLink="false">http://chemiometria.wordpress.com/?p=82</guid>
		<description><![CDATA[Robert Gentleman ci spiega come fare delle bellissime word cloud utilizzando R, con un package rilasciato da poco da Ian Fellow che, guarda caso, si chiama proprio wordcloud. Filed under: infografica, plot, R, text Tagged: R, text plot, visualization, word cloud, wordcloud<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=82&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Robert Gentleman <a href="http://onertipaday.blogspot.com/2011/07/word-cloud-in-r.html?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+OneRTipADay+%28One+R+Tip+A+Day%29" target="_blank">ci spiega</a> come fare delle bellissime word cloud utilizzando R, con un package rilasciato da poco da Ian Fellow che, guarda caso, si chiama proprio <em><a href="http://cran.r-project.org/web/packages/wordcloud/index.html" target="_blank">wordcloud</a></em>.</p>
<br />Filed under: <a href='http://chemiometria.wordpress.com/category/infografica/'>infografica</a>, <a href='http://chemiometria.wordpress.com/category/plot/'>plot</a>, <a href='http://chemiometria.wordpress.com/category/r/'>R</a>, <a href='http://chemiometria.wordpress.com/category/text/'>text</a> Tagged: <a href='http://chemiometria.wordpress.com/tag/r/'>R</a>, <a href='http://chemiometria.wordpress.com/tag/text-plot/'>text plot</a>, <a href='http://chemiometria.wordpress.com/tag/visualization/'>visualization</a>, <a href='http://chemiometria.wordpress.com/tag/word-cloud/'>word cloud</a>, <a href='http://chemiometria.wordpress.com/tag/wordcloud/'>wordcloud</a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/chemiometria.wordpress.com/82/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/chemiometria.wordpress.com/82/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/chemiometria.wordpress.com/82/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/chemiometria.wordpress.com/82/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/chemiometria.wordpress.com/82/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/chemiometria.wordpress.com/82/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/chemiometria.wordpress.com/82/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/chemiometria.wordpress.com/82/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/chemiometria.wordpress.com/82/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/chemiometria.wordpress.com/82/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/chemiometria.wordpress.com/82/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/chemiometria.wordpress.com/82/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/chemiometria.wordpress.com/82/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/chemiometria.wordpress.com/82/" /></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=82&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></content:encoded>
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			<media:title type="html">marcocalderisi</media:title>
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	</item>
		<item>
		<title>Diagram of distribution relationships</title>
		<link>http://chemiometria.wordpress.com/2011/06/02/diagram-of-distribution-relationships/</link>
		<comments>http://chemiometria.wordpress.com/2011/06/02/diagram-of-distribution-relationships/#comments</comments>
		<pubDate>Thu, 02 Jun 2011 15:28:19 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[distribuzioni]]></category>
		<category><![CDATA[statistica]]></category>

		<guid isPermaLink="false">http://chemiometria.wordpress.com/?p=77</guid>
		<description><![CDATA[Non è R ma è statistica. Quindi comunque può interessare&#8230;sono le relazioni che legano le distribuzioni ed il tutto è raccolto in un simpatico ed utile diagramma cliccabile. Filed under: Uncategorized Tagged: distribuzioni, statistica<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=77&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Non è R ma è statistica. Quindi comunque può interessare&#8230;sono le relazioni che legano le distribuzioni ed il tutto è raccolto in un simpatico ed utile <a href="http://www.johndcook.com/distribution_chart.html" title="diagramma distribuzioni" target="_blank">diagramma cliccabile</a>.</p>
<br />Filed under: <a href='http://chemiometria.wordpress.com/category/uncategorized/'>Uncategorized</a> Tagged: <a href='http://chemiometria.wordpress.com/tag/distribuzioni/'>distribuzioni</a>, <a href='http://chemiometria.wordpress.com/tag/statistica/'>statistica</a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/chemiometria.wordpress.com/77/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/chemiometria.wordpress.com/77/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/chemiometria.wordpress.com/77/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/chemiometria.wordpress.com/77/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/chemiometria.wordpress.com/77/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/chemiometria.wordpress.com/77/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/chemiometria.wordpress.com/77/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/chemiometria.wordpress.com/77/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/chemiometria.wordpress.com/77/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/chemiometria.wordpress.com/77/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/chemiometria.wordpress.com/77/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/chemiometria.wordpress.com/77/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/chemiometria.wordpress.com/77/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/chemiometria.wordpress.com/77/" /></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=77&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></content:encoded>
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			<media:title type="html">marcocalderisi</media:title>
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		<title>R short vocabulary</title>
		<link>http://chemiometria.wordpress.com/2011/06/02/r-short-vocabulary/</link>
		<comments>http://chemiometria.wordpress.com/2011/06/02/r-short-vocabulary/#comments</comments>
		<pubDate>Thu, 02 Jun 2011 15:13:51 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[programmazione]]></category>
		<category><![CDATA[R]]></category>
		<category><![CDATA[programming]]></category>

		<guid isPermaLink="false">http://chemiometria.wordpress.com/?p=75</guid>
		<description><![CDATA[Forse vi sarete chiesti di quanti &#8220;vocaboli&#8221; (ovvero funzioni) disponga R&#8230;be, sono diverse migliaia, per l&#8217;esattezza 2382. Ma quante sono poi quelle effettivamente utili? quelle che andrebbero sapute per forza? Hadley Wickham dice 350. L&#8217;elenco lo trovate qui. Filed under: programmazione, R Tagged: programming, R<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=75&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Forse vi sarete chiesti di quanti &#8220;vocaboli&#8221; (ovvero funzioni) disponga R&#8230;be, sono diverse migliaia, per l&#8217;esattezza 2382.<br />
Ma quante sono poi quelle effettivamente utili? quelle che andrebbero sapute per forza? Hadley Wickham dice 350. L&#8217;elenco lo trovate <a title="vocabulary" href="https://github.com/hadley/devtools/wiki/vocabulary" target="_blank">qui</a>.</p>
<br />Filed under: <a href='http://chemiometria.wordpress.com/category/programmazione/'>programmazione</a>, <a href='http://chemiometria.wordpress.com/category/r/'>R</a> Tagged: <a href='http://chemiometria.wordpress.com/tag/programming/'>programming</a>, <a href='http://chemiometria.wordpress.com/tag/r/'>R</a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/chemiometria.wordpress.com/75/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/chemiometria.wordpress.com/75/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/chemiometria.wordpress.com/75/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/chemiometria.wordpress.com/75/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/chemiometria.wordpress.com/75/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/chemiometria.wordpress.com/75/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/chemiometria.wordpress.com/75/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/chemiometria.wordpress.com/75/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/chemiometria.wordpress.com/75/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/chemiometria.wordpress.com/75/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/chemiometria.wordpress.com/75/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/chemiometria.wordpress.com/75/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/chemiometria.wordpress.com/75/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/chemiometria.wordpress.com/75/" /></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=75&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></content:encoded>
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			<media:title type="html">marcocalderisi</media:title>
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		<title>Mappare località e collegamenti in R</title>
		<link>http://chemiometria.wordpress.com/2011/05/19/mappare-localita-e-collegamenti-in-r/</link>
		<comments>http://chemiometria.wordpress.com/2011/05/19/mappare-localita-e-collegamenti-in-r/#comments</comments>
		<pubDate>Thu, 19 May 2011 09:53:04 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[infografica]]></category>
		<category><![CDATA[plot]]></category>
		<category><![CDATA[R]]></category>
		<category><![CDATA[geomaps]]></category>
		<category><![CDATA[visualization]]></category>

		<guid isPermaLink="false">http://chemiometria.wordpress.com/?p=71</guid>
		<description><![CDATA[Da tempo sono affascinato dai sistemi di visualizzazione dei dati e sono alla ricerca di strumenti software che permettano a “umili” statistici con il pallino della grafica, di darsi un po’ da fare in tal senso. E’ quindi con piacere che ho visto che, anche chi usa R, ora può mappare le connessioni tra punti [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=71&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Da tempo sono affascinato dai sistemi di visualizzazione dei dati e sono alla ricerca di strumenti software che permettano a “umili” statistici con il pallino della grafica, di darsi un po’ da fare in tal senso.<br />
E’ quindi con piacere che ho visto che, anche chi usa R, ora può mappare le connessioni tra punti spaziali diversi. Ai seguenti link si trovano infatti le istruzioni per disegnare delle connessioni &#8220;geografiche&#8221; molto belle a vedersi!<br />
<span id="more-71"></span><br />
dal blog di RevolutionsAnalytics abbiamo <a href="http://blog.revolutionanalytics.com/2011/05/mapping-locations-in-r-with-the-data-science-toolkit.html" target="_blank">Mapping locations in R with the Data Science Toolkit</a></p>
<p>mentre su <a href="http://flowingdata.com/" target="_blank">FlowingData</a> ci sono proprio le istruzioni operative: <a href="http://flowingdata.com/2011/05/11/how-to-map-connections-with-great-circles/" target="_blank">How to map connections with great circles</a></p>
<br />Filed under: <a href='http://chemiometria.wordpress.com/category/infografica/'>infografica</a>, <a href='http://chemiometria.wordpress.com/category/plot/'>plot</a>, <a href='http://chemiometria.wordpress.com/category/r/'>R</a> Tagged: <a href='http://chemiometria.wordpress.com/tag/geomaps/'>geomaps</a>, <a href='http://chemiometria.wordpress.com/tag/r/'>R</a>, <a href='http://chemiometria.wordpress.com/tag/visualization/'>visualization</a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/chemiometria.wordpress.com/71/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/chemiometria.wordpress.com/71/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/chemiometria.wordpress.com/71/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/chemiometria.wordpress.com/71/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/chemiometria.wordpress.com/71/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/chemiometria.wordpress.com/71/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/chemiometria.wordpress.com/71/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/chemiometria.wordpress.com/71/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/chemiometria.wordpress.com/71/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/chemiometria.wordpress.com/71/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/chemiometria.wordpress.com/71/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/chemiometria.wordpress.com/71/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/chemiometria.wordpress.com/71/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/chemiometria.wordpress.com/71/" /></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=71&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></content:encoded>
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			<media:title type="html">marcocalderisi</media:title>
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		<item>
		<title>About ggplot2</title>
		<link>http://chemiometria.wordpress.com/2011/04/29/about-ggplot2/</link>
		<comments>http://chemiometria.wordpress.com/2011/04/29/about-ggplot2/#comments</comments>
		<pubDate>Fri, 29 Apr 2011 11:19:27 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[plot]]></category>
		<category><![CDATA[R]]></category>
		<category><![CDATA[ggplot2]]></category>
		<category><![CDATA[visualization]]></category>

		<guid isPermaLink="false">http://chemiometria.wordpress.com/?p=67</guid>
		<description><![CDATA[Sembra proprio che ggplot2 sia un package mai più senza&#8230;ecco un paio di applicazioni che ne espandono le potenzialità: ggplot2 Tutorial: Scatterplots in a Series of Small Multiples, (pubblicato da Getting Genetics Done) che spiega come utilizzare ggplot2 secondo i dettami dello &#8221;small multiples&#8221; ideato da Edward Tufte. arrange multiple ggplot2 plots in the same image [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=67&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Sembra proprio che ggplot2 sia un package mai più senza&#8230;ecco un paio di applicazioni che ne espandono le potenzialità:</p>
<ul>
<li><a href="http://gettinggeneticsdone.blogspot.com/2010/01/ggplot2-tutorial-scatterplots-in-series.html" target="_blank">ggplot2 Tutorial: Scatterplots in a Series of Small Multiples</a>, (pubblicato da <a href="http://gettinggeneticsdone.blogspot.com/">Getting Genetics Done</a>) che spiega come utilizzare ggplot2 secondo i dettami dello &#8221;small multiples&#8221; ideato da <a href="http://www.edwardtufte.com/tufte/">Edward Tufte</a>.</li>
<li><a href="http://gettinggeneticsdone.blogspot.com/2010/03/arrange-multiple-ggplot2-plots-in-same.html">arrange multiple ggplot2 plots in the same image window</a> sempre a cura di <a href="http://gettinggeneticsdone.blogspot.com/">Getting Genetics Done</a>, che ci mostra come inserire elegantemente più grafici in una stessa finistra</li>
</ul>
<br />Filed under: <a href='http://chemiometria.wordpress.com/category/plot/'>plot</a>, <a href='http://chemiometria.wordpress.com/category/r/'>R</a> Tagged: <a href='http://chemiometria.wordpress.com/tag/ggplot2/'>ggplot2</a>, <a href='http://chemiometria.wordpress.com/tag/plot/'>plot</a>, <a href='http://chemiometria.wordpress.com/tag/r/'>R</a>, <a href='http://chemiometria.wordpress.com/tag/visualization/'>visualization</a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/chemiometria.wordpress.com/67/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/chemiometria.wordpress.com/67/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/chemiometria.wordpress.com/67/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/chemiometria.wordpress.com/67/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/chemiometria.wordpress.com/67/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/chemiometria.wordpress.com/67/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/chemiometria.wordpress.com/67/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/chemiometria.wordpress.com/67/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/chemiometria.wordpress.com/67/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/chemiometria.wordpress.com/67/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/chemiometria.wordpress.com/67/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/chemiometria.wordpress.com/67/" /></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/chemiometria.wordpress.com/67/"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/chemiometria.wordpress.com/67/" /></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=67&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></content:encoded>
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			<media:title type="html">marcocalderisi</media:title>
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		<title>Aggiornare R</title>
		<link>http://chemiometria.wordpress.com/2011/04/15/aggiornare-r/</link>
		<comments>http://chemiometria.wordpress.com/2011/04/15/aggiornare-r/#comments</comments>
		<pubDate>Fri, 15 Apr 2011 07:13:10 +0000</pubDate>
		<dc:creator>marcocalderisi</dc:creator>
				<category><![CDATA[programmazione]]></category>
		<category><![CDATA[R]]></category>
		<category><![CDATA[tip]]></category>
		<category><![CDATA[installazione]]></category>

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		<description><![CDATA[R viene aggiornato con una cadenza piuttosto frequente. Molto bene! Direte voi. Purtroppo c&#8217;è un problema. Ogni qualvolta aggiornerete R lui si &#8220;dimenticherà&#8221; di tutte le migliaia di package che avevate fino a quel momento faticosamente installato. Non vi preoccupate. C&#8217;è anche una soluzione. Prima di installare la nuova versione, aprite quella vecchia e digitate [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=chemiometria.wordpress.com&amp;blog=21106182&amp;post=63&amp;subd=chemiometria&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>R viene aggiornato con una cadenza piuttosto frequente. Molto bene! Direte voi. Purtroppo c&#8217;è un problema. Ogni qualvolta aggiornerete R lui si &#8220;dimenticherà&#8221; di tutte le migliaia di package che avevate fino a quel momento faticosamente installato.</p>
<p>Non vi preoccupate. C&#8217;è anche una soluzione. Prima di installare la nuova versione, aprite quella vecchia e digitate il seguente codice:</p>
<pre><code>packages &lt;- installed.packages()[,"Package"] save(packages, file="Rpackages") </code></pre>
<p>poi chiudetela, installate la nuova e scrivete:</p>
<pre><code>load("Rpackages") for (p in setdiff(packages, installed.packages()[,"Package"])) install.packages(p) R scaricherà ed installerà di nuovo tutti i package che avevate in precedenza, nelle versioni più aggiornate! </code></pre>
<p>Due link utili: <a href="http://stackoverflow.com/questions/1401904/painless-way-to-install-a-new-version-of-r">Stackoverflow</a> e <a href="http://onertipaday.blogspot.com/2008/10/r-upgrade-on-mac-os-x-1055-leopard.html">One R tip a day</a></p>
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