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POR data.frame, group some inputs into "data$inputs"
 

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  1. POR data.frame, group some inputs into "data$inputs"
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    <p>I have a <code>dataframe</code>, loaded from file, such as</p> <pre><code>F[1] F[2] ... [F100000] &lt;Output&gt; 1 0 ... 1 6.25 1 1 ... 0 7.22 ...(5000 rows) </code></pre> <p>I want to represent this data as <code>data.frame</code> where <code>data$inputs</code> is inputs from <code>F[1]</code> to <code>F[100000]</code> and <code>data$output</code> is outputs to use this <code>dataframe</code> this way:</p> <p><code>randomForest(outputs~inputs,data=data)</code></p> <p>But I have no way how to group <code>F</code> inputs into <code>data$inputs</code></p> <p>I wrote some functions but it seems awful:</p> <pre><code>loadDescriptors &lt;-function(input){ rd = read.csv(input, sep = " ", header =TRUE) rd &lt;- rd[,colSums(is.na(rd))&lt;nrow(rd)] #Delete empty columns na.omit(rd) #Delete Empty rows } getDescriptors &lt;- function(data){ return(grep("F",colnames(data), value=TRUE)) } getFormula &lt;- function(input){ return(as.formula(paste("outputs ~ ", paste(getDescriptors(input), collapse="+")))) } </code></pre> <p><strong>Added</strong>: Sample of data:</p> <pre><code>&gt; d &lt;- loadDescriptors("Test.stg") &gt; str(d) 'data.frame': 4316 obs. of 325 variables: $ F.0. : int 2 1 0 0 0 0 0 0 0 0 ... $ F.1. : int 0 1 0 0 0 0 0 1 0 0 ... $ F.2. : int 0 0 1 0 0 0 0 0 0 0 ... $ F.3. : int 0 0 1 1 0 0 0 0 1 0 ... $ F.4. : int 0 0 1 0 0 0 0 0 0 0 ... $ F.5. : int 0 0 1 0 0 0 0 0 0 0 ... $ F.6. : int 0 0 1 0 0 0 0 0 0 0 ... $ F.7. : int 0 0 1 0 0 0 0 0 0 0 ... $ F.8. : int 0 0 1 0 0 0 0 0 0 0 ... $ F.9. : int 0 0 1 0 0 0 1 0 0 0 ... $ F.10. : int 0 0 0 1 0 0 0 0 0 0 ... ... $ F.98. : int 0 0 0 0 0 0 0 0 0 0 ... [list output truncated] </code></pre> <p>And the output is:</p> <pre><code>&gt; str(d$Activity) int [1:4316] 1 0 0 0 0 1 0 1 0 0 ... </code></pre> <p>I can refer to any field of <code>data.frame</code> for example: </p> <pre><code>&gt; str(d$F.2.) int [1:4316] 0 0 1 0 0 0 0 0 0 0 ... </code></pre> <p>But I want to group all inputs to refer to inputs, as <code>data$input</code>, how can i do it?</p>
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    1. USSergey Sosnin
    1. USSergey Sosnin
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    1. COCould you run str(dataframe) and post the result? I think that might make it easier to understand what data you have.
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      1. USChristian
    2. COYour question is how to find all columns with names: `F.0.`, `F.1.` etc.? If so, then something like `DF[,colnames(DF) %in% paste("F.", 1:1000, ".", sep = "")]` might help. I'm not sure, though, what the question is.
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      1. POR data.frame, group some inputs into "data$inputs"
      1. USalexis_laz
 

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