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POHow can I correctly calculate the lengths of fields in a CSV dcoument using Perl?
 

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  1. POHow can I correctly calculate the lengths of fields in a CSV dcoument using Perl?
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    <p>I have a datas et and like to do a simple <code>while</code> operation with a Perl script. Here is a small extraction from the dataset:</p> <blockquote> <p>"number","code","country","gamma","X1","X2","X3","X4","X5","X6" 1,"DZA","Algeria","0.01",7.44,47.3,0.46,0,0,0.13 2,"AGO","Angola","0.00",6.79,"NULL",0.21,1,0,0.28 3,"BEN","Benin","-0.01",7.02,38.9,0.27,1,0,0.05 4,"BWA","Botswana","0.06",6.28,45.7,0.42,1,0,0.07 5,"HVO","Burkina Faso","0.00",6.15,36.3,0.08,1,0,0.05 6,"BDI","Burundi","0.00",6.38,41.8,0.18,1,0,0</p> </blockquote> <p>The script should count the length of every <code>,</code> separated field and store the highest values into an array.</p> <p>However, the saving doesn't work properly. Here is a part of the code:</p> <pre><code>@maxl = map length, @terms; while(`&lt;INFILE&gt;`) { $_ =~ s/[\"\n]//g ; @terms = split/$sep/, $_; @lengths = map length, @terms; for($k = 0, $k &lt;= $#terms, $k++) { if($lengths[$k] &gt; $maxl[$k]) { $maxl[$k] = $lenghts[$k]; } } print "@lengths\n"; } </code></pre> <p>Now the <code>@maxl</code> uses an earlier part from the code where it uses the second line of the dataset. When I use a <code>print</code> command just to see the values of the <code>@maxl</code> operation i get:</p> <blockquote> <p>1 3 7 4 4 4 4 1 1 5</p> </blockquote> <p>In the <code>while</code> loop I used another <code>print</code> statement just to see the other values, I get:</p> <pre><code>1 3 6 4 4 4 4 1 1 4 1 3 5 5 4 4 4 1 1 4 1 3 8 4 4 4 4 1 1 4 1 3 12 4 4 4 4 1 1 4 1 3 7 4 4 4 4 1 1 1 1 3 8 4 4 4 4 1 1 4 1 3 10 4 4 4 4 1 1 4 1 3 16 5 4 4 4 1 1 4 2 3 4 5 3 4 4 1 1 4 2 3 7 4 4 4 4 1 1 4 2 3 5 4 4 4 4 1 1 4 2 3 5 4 4 4 4 1 1 4 2 3 8 4 4 4 4 1 1 4 2 3 5 4 4 4 1 1 1 4 </code></pre> <p>The fourth column eg has obviously values which are greater than 3. The <code>while</code> loop was supposed to save the greatest values and substitute those values into <code>@maxl</code>.</p> <p>What went wrong?</p> <hr> <p>...in the <code>for</code> loop the comma are wrong </p> <pre><code>for($k = 0, $k &lt;= $#terms, $k++) </code></pre> <p>however, after cleaning that up there still seems to be a problem...</p>
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