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	<title>Heuristic Andrew</title>
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	<description>Good-enough solutions for an imperfect world</description>
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		<title>Heuristic Andrew</title>
		<link>https://heuristically.wordpress.com</link>
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		<item>
		<title>Convert written numbers to Arabic numerals</title>
		<link>https://heuristically.wordpress.com/2012/03/22/convert-written-numbers-sas/</link>
		<comments>https://heuristically.wordpress.com/2012/03/22/convert-written-numbers-sas/#comments</comments>
		<pubDate>Thu, 22 Mar 2012 23:05:37 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[SAS]]></category>
		<category><![CDATA[code]]></category>
		<category><![CDATA[howto]]></category>
		<category><![CDATA[nlp]]></category>
		<category><![CDATA[sas]]></category>

		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=679</guid>
		<description><![CDATA[In Natural Language Processing it can be helpful within a larger body of text to standardize written numbers to Arabic numerals. For example, we will change &#8220;I am forty-six years old&#8221; to &#8220;I am 46 years old,&#8221; so the age &#8230; <a href="https://heuristically.wordpress.com/2012/03/22/convert-written-numbers-sas/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=679&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<title>Plotting individual growth charts</title>
		<link>https://heuristically.wordpress.com/2012/03/14/plotting-individual-growth-charts/</link>
		<comments>https://heuristically.wordpress.com/2012/03/14/plotting-individual-growth-charts/#comments</comments>
		<pubDate>Wed, 14 Mar 2012 20:33:22 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[r]]></category>
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		<category><![CDATA[visualization]]></category>

		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=666</guid>
		<description><![CDATA[This R code draws individual growth plots as shown in &#8220;Applied Longitudinal Data Analysis: Modeling Change and Event Occurrence&#8221; by Judith D. Singer and John B. Willett, an excellent book on multilevel modeling and survival analysis. This code recreates figure &#8230; <a href="https://heuristically.wordpress.com/2012/03/14/plotting-individual-growth-charts/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=666&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>3</slash:comments>
	
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			<media:title type="html">ALDA figure 2.5</media:title>
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	</item>
		<item>
		<title>Scales and transformations in ggplot2 0.9.0</title>
		<link>https://heuristically.wordpress.com/2012/03/14/scales-and-transformations-in-ggplot2-0-9-0/</link>
		<comments>https://heuristically.wordpress.com/2012/03/14/scales-and-transformations-in-ggplot2-0-9-0/#comments</comments>
		<pubDate>Wed, 14 Mar 2012 18:55:38 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Bugs]]></category>
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		<category><![CDATA[error message]]></category>
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		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=663</guid>
		<description><![CDATA[Some R code designed for ggplot2 0.8.9 is not compatible with ggplot2 0.9.0, and today the ggplot2 web site has outdated documentation which gives this broken example: Dennis Murphy points to the ggplot2 0.9.0 transition guide from where I derived &#8230; <a href="https://heuristically.wordpress.com/2012/03/14/scales-and-transformations-in-ggplot2-0-9-0/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=663&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<title>doSMP removed from CRAN</title>
		<link>https://heuristically.wordpress.com/2012/02/17/dosmp-removed-from-cran/</link>
		<comments>https://heuristically.wordpress.com/2012/02/17/dosmp-removed-from-cran/#comments</comments>
		<pubDate>Fri, 17 Feb 2012 23:31:09 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Bugs]]></category>
		<category><![CDATA[bug]]></category>
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		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=653</guid>
		<description><![CDATA[If you do parallel processing in R on Windows, then you probably have heard of the doSMP package. However, it was recently removed from the CRAN repository with the terse message: Package ‘doSMP’ was removed from the CRAN repository. Revolution &#8230; <a href="https://heuristically.wordpress.com/2012/02/17/dosmp-removed-from-cran/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=653&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>2</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<title>Checking return codes for errors in SAS</title>
		<link>https://heuristically.wordpress.com/2012/02/09/return-codes-errors-sas/</link>
		<comments>https://heuristically.wordpress.com/2012/02/09/return-codes-errors-sas/#comments</comments>
		<pubDate>Thu, 09 Feb 2012 20:05:09 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Data stewardship]]></category>
		<category><![CDATA[SAS]]></category>
		<category><![CDATA[code]]></category>
		<category><![CDATA[howto]]></category>
		<category><![CDATA[sas]]></category>
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		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=643</guid>
		<description><![CDATA[You should check for error return codes in any SAS programs that run unattended in batch jobs, so you can handle the exception properly. For example, if the data are invalid, you don&#8217;t want to generate reports or insert bad &#8230; <a href="https://heuristically.wordpress.com/2012/02/09/return-codes-errors-sas/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=643&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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		<title>Using neural network for regression</title>
		<link>https://heuristically.wordpress.com/2011/11/17/using-neural-network-for-regression/</link>
		<comments>https://heuristically.wordpress.com/2011/11/17/using-neural-network-for-regression/#comments</comments>
		<pubDate>Thu, 17 Nov 2011 18:23:43 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Machine learning and data mining]]></category>
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		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=619</guid>
		<description><![CDATA[Artificial neural networks are commonly thought to be used just for classification because of the relationship to logistic regression: neural networks typically use a logistic activation function and output values from 0 to 1 like logistic regression. However, the worth &#8230; <a href="https://heuristically.wordpress.com/2011/11/17/using-neural-network-for-regression/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=619&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>13</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<media:content url="http://heuristically.files.wordpress.com/2011/11/lm.png" medium="image">
			<media:title type="html">lm</media:title>
		</media:content>

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			<media:title type="html">nnet</media:title>
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	</item>
		<item>
		<title>Train neural network in R, predict in SAS</title>
		<link>https://heuristically.wordpress.com/2011/11/11/train-neural-network-in-r-predict-in-sas/</link>
		<comments>https://heuristically.wordpress.com/2011/11/11/train-neural-network-in-r-predict-in-sas/#comments</comments>
		<pubDate>Fri, 11 Nov 2011 17:27:17 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Machine learning and data mining]]></category>
		<category><![CDATA[SAS]]></category>
		<category><![CDATA[code]]></category>
		<category><![CDATA[machine learning]]></category>
		<category><![CDATA[r]]></category>
		<category><![CDATA[r-project]]></category>
		<category><![CDATA[sas]]></category>
		<category><![CDATA[statistics]]></category>

		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=608</guid>
		<description><![CDATA[This R code fits an artificial neural network in R and generates Base SAS code, so new records can be scored entirely in Base SAS. This is intended to be a simple, elegant, fast solution. You don&#8217;t need SAS Enterprise &#8230; <a href="https://heuristically.wordpress.com/2011/11/11/train-neural-network-in-r-predict-in-sas/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=608&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>https://heuristically.wordpress.com/2011/11/11/train-neural-network-in-r-predict-in-sas/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<item>
		<title>Logistic function macro for SAS</title>
		<link>https://heuristically.wordpress.com/2011/11/11/logistic-function-macro-for-sas/</link>
		<comments>https://heuristically.wordpress.com/2011/11/11/logistic-function-macro-for-sas/#comments</comments>
		<pubDate>Fri, 11 Nov 2011 16:39:18 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Hack]]></category>
		<category><![CDATA[code]]></category>
		<category><![CDATA[macro]]></category>
		<category><![CDATA[sas]]></category>

		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=591</guid>
		<description><![CDATA[Used in logistic regression, neural networks, and countless other applications, the logistic function is simple to understand yet can be quirky to calculate in SAS because of how SAS treats extreme values. First, let&#8217;s consider the value -1000: R calculates &#8230; <a href="https://heuristically.wordpress.com/2011/11/11/logistic-function-macro-for-sas/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=591&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<media:content url="http://heuristically.files.wordpress.com/2011/11/sas_logistic_function.jpg" medium="image">
			<media:title type="html">SAS logistic function lpot</media:title>
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		<item>
		<title>Confidence interval diagram in R</title>
		<link>https://heuristically.wordpress.com/2011/10/19/confidence-interval-diagram-in-r/</link>
		<comments>https://heuristically.wordpress.com/2011/10/19/confidence-interval-diagram-in-r/#comments</comments>
		<pubDate>Thu, 20 Oct 2011 04:47:21 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
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		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=561</guid>
		<description><![CDATA[This code shows how to easily plot a beautiful confidence interval diagram in R. First, let&#8217;s input the raw data. We&#8217;ll be making two confidence intervals for two samples of 10. In case you curious, the data represents samples from &#8230; <a href="https://heuristically.wordpress.com/2011/10/19/confidence-interval-diagram-in-r/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=561&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>4</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<media:content url="http://heuristically.files.wordpress.com/2011/10/ci.png" medium="image">
			<media:title type="html">confidence interval diagram</media:title>
		</media:content>

		<media:content url="http://heuristically.files.wordpress.com/2011/10/ci1.png" medium="image">
			<media:title type="html">95% confidence interval diagram in R</media:title>
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		<item>
		<title>Model decision tree in R, score in Base SAS</title>
		<link>https://heuristically.wordpress.com/2011/10/11/model-decision-tree-in-r-score-in-sas/</link>
		<comments>https://heuristically.wordpress.com/2011/10/11/model-decision-tree-in-r-score-in-sas/#comments</comments>
		<pubDate>Tue, 11 Oct 2011 23:17:36 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Machine learning and data mining]]></category>
		<category><![CDATA[SAS]]></category>
		<category><![CDATA[code]]></category>
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		<category><![CDATA[machine learning]]></category>
		<category><![CDATA[outlook 2007]]></category>
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		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=543</guid>
		<description><![CDATA[This code creates a decision tree model in R using party::ctree() and prepares the model for export it from R to Base SAS, so SAS can score new records. SAS Enterprise Miner and PMML are not required, and Base SAS &#8230; <a href="https://heuristically.wordpress.com/2011/10/11/model-decision-tree-in-r-score-in-sas/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=543&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>12</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<item>
		<title>Paired sample t-test in R</title>
		<link>https://heuristically.wordpress.com/2011/09/28/paired-sample-t-test-in-r/</link>
		<comments>https://heuristically.wordpress.com/2011/09/28/paired-sample-t-test-in-r/#comments</comments>
		<pubDate>Thu, 29 Sep 2011 04:12:01 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Basics]]></category>
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		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=523</guid>
		<description><![CDATA[Let&#8217;s walk through using R and Student&#8217;s t-test to compare paired sample data. The book Statistics: The Exploration &#38; Analysis of Data (6th edition, p505) presents the longitudinal study &#8220;Bone mass is recovered from lactation to postweaning in adolescent mothers &#8230; <a href="https://heuristically.wordpress.com/2011/09/28/paired-sample-t-test-in-r/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=523&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>2</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<media:content url="http://heuristically.files.wordpress.com/2011/09/bone-density-boxplot.png" medium="image">
			<media:title type="html">bone density boxplot from R</media:title>
		</media:content>

		<media:content url="http://heuristically.files.wordpress.com/2011/09/bone-density-qqplot.png" medium="image">
			<media:title type="html">bone density qq plot from R</media:title>
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		<item>
		<title>Basic line chart with ggplot2</title>
		<link>https://heuristically.wordpress.com/2011/09/27/basic-line-chart-with-ggplot2/</link>
		<comments>https://heuristically.wordpress.com/2011/09/27/basic-line-chart-with-ggplot2/#comments</comments>
		<pubDate>Tue, 27 Sep 2011 15:46:37 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Basics]]></category>
		<category><![CDATA[code]]></category>
		<category><![CDATA[howto]]></category>
		<category><![CDATA[r]]></category>
		<category><![CDATA[r-project]]></category>
		<category><![CDATA[tutorial]]></category>

		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=515</guid>
		<description><![CDATA[ggplot2 is a package for R which easily draws plots that are easier on the eyes than R&#8217;s built-in plotting functions, though the grammar is different than what is commonly used in R. This code demonstrates how to prepare a &#8230; <a href="https://heuristically.wordpress.com/2011/09/27/basic-line-chart-with-ggplot2/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=515&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>5</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<media:content url="http://heuristically.files.wordpress.com/2011/09/basic_math_functions_ggplot2.png" medium="image">
			<media:title type="html">ggplot basic math funcions</media:title>
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		<title>Birthday gift code puzzle</title>
		<link>https://heuristically.wordpress.com/2011/09/19/birthday-gift-code-puzzle/</link>
		<comments>https://heuristically.wordpress.com/2011/09/19/birthday-gift-code-puzzle/#comments</comments>
		<pubDate>Mon, 19 Sep 2011 23:06:21 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Optimization]]></category>
		<category><![CDATA[SAS]]></category>
		<category><![CDATA[sas]]></category>

		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=508</guid>
		<description><![CDATA[This is a SAS code puzzle. The code works as is, but can you make it simpler? We do this while enjoying simulation and the quirkiness of the Gregorian calendar. The problem A person receives a gift on a random &#8230; <a href="https://heuristically.wordpress.com/2011/09/19/birthday-gift-code-puzzle/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=508&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<title>List of counties and zip codes affected by Hurricane Irene</title>
		<link>https://heuristically.wordpress.com/2011/09/01/list-of-counties-and-zip-codes-affected-by-hurricane-irene/</link>
		<comments>https://heuristically.wordpress.com/2011/09/01/list-of-counties-and-zip-codes-affected-by-hurricane-irene/#comments</comments>
		<pubDate>Thu, 01 Sep 2011 17:18:44 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Data set]]></category>

		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=503</guid>
		<description><![CDATA[From the FEMA.gov web site, this is a consolidated list of counties and zip codes in the United States affected by Hurricane Irene. Counties Virginia has many &#8220;independent cities&#8221; which are technically not part of any county, so the city &#8230; <a href="https://heuristically.wordpress.com/2011/09/01/list-of-counties-and-zip-codes-affected-by-hurricane-irene/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=503&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>https://heuristically.wordpress.com/2011/09/01/list-of-counties-and-zip-codes-affected-by-hurricane-irene/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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		<item>
		<title>Programmatically download monthly economic indicators</title>
		<link>https://heuristically.wordpress.com/2011/08/24/programmatically-download-monthly-economic-indicators/</link>
		<comments>https://heuristically.wordpress.com/2011/08/24/programmatically-download-monthly-economic-indicators/#comments</comments>
		<pubDate>Wed, 24 Aug 2011 17:39:05 +0000</pubDate>
		<dc:creator>heuristicandrew</dc:creator>
				<category><![CDATA[Data set]]></category>
		<category><![CDATA[SAS]]></category>
		<category><![CDATA[code]]></category>
		<category><![CDATA[howto]]></category>
		<category><![CDATA[sas]]></category>

		<guid isPermaLink="false">http://heuristically.wordpress.com/?p=493</guid>
		<description><![CDATA[This SAS code programmatically downloads monthly economic indicators from FRED, and merges multiple time series into a single data set for convenient analysis. FRED (Federal Reserve Economic Data) is an excellent resource from the Federal Reserve Bank of St. Louis: &#8230; <a href="https://heuristically.wordpress.com/2011/08/24/programmatically-download-monthly-economic-indicators/">Continue reading <span class="meta-nav">&#8594;</span></a><img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=heuristically.wordpress.com&#038;blog=8820363&#038;post=493&#038;subd=heuristically&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>2</slash:comments>
	
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			<media:title type="html">heuristicandrew</media:title>
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