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POWhy are numerical values stored as factors in R?
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  1. POWhy are numerical values stored as factors in R?
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    copied!<blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/14244147/r-interpreting-variable-in-data-frame-as-factor-it-isnt">R interpreting variable in data frame as factor; it isn’t</a> </p> </blockquote> <p>I am having an issue with some code I've written in R and I think my problems are stemming from a poor understanding of factors in R.</p> <p><strong>What I am trying to do:</strong> I have a column numbers and I want to create another column of bin descriptions (e.g. 1,2,3, etc which correspond to bin1, bin2, etc.)</p> <p>Here is the code:</p> <pre><code>## import data to data frame rawData = read.table("Data.csv", sep = ",", header = TRUE) ## reduce socre into bins rawData["s10_BIN"] = NA for(i in 1:length(rawData[,"foo"])) { if(rawData[i,"s10"] &gt; 0 &amp;&amp; rawData[i,"s10"] &lt;= .5) { rawData[i,"s10_BIN"] = 1 } else if(rawData[i,"s10"] &gt; .5 &amp;&amp; rawData[i,"s10"] &lt;= 1) { rawdata[i,"s10_BIN"] = 2 } else if(rawData[i,"s10"] &gt; 1 &amp;&amp; rawData[i,"s10"] &lt;= 1.5) { rawData[i,"s10_BIN"] = 3 } else if(rawData[i,"s10"] &gt; 1.5 &amp;&amp; rawData[i,"s10"] &lt;= 2) { rawData[i,"s10_BIN_BIN"] = 4 } else rawData[i,"s10_BIN"] = 0 } </code></pre> <p>I keep getting the error</p> <pre><code>1: In Ops.factor(rawData[i, "s10"], 0) : &gt; not meaningful for factors 2: In Ops.factor(rawData[i, "s10"], 0.5) : &lt;= not meaningful for factors </code></pre> <p>Can someone give me insight as to what I am missing? Thanks!</p> <p>EDIT: Here are the first 2 rows of the data:</p> <pre><code> rawData[1:2,] ID PRODUCT GROUP MARKET s10 CLAIMS NUM_CLAIMS s10_BIN 1 1 foo A C NULL -5 2 NA 2 2 foo A D 1.064 1 1 NA </code></pre> <p>I have a feeling the issue may be the NULL values...</p>
 

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