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    <p>The functions you're looking for are in the 'slam' package. Since 'slam' is only imported and isn't a dependency it takes a little bit of work to view the documentation. Here is an example session of how one might go about figuring that out and looking at the documentation.</p> <pre><code>&gt; # I'm assuming you loaded tm first &gt; library(tm) &gt; # See if we can view the code &gt; col_sums Error: object 'col_sums' not found &gt; # Use getAnywhere to grab the function even if the function is &gt; # in a namespace that isn't exported &gt; getAnywhere("col_sums") A single object matching ‘col_sums’ was found It was found in the following places namespace:slam with value function (x, na.rm = FALSE, dims = 1, ...) UseMethod("col_sums") &lt;environment: namespace:slam&gt; &gt; # So the function is in the slam package &gt; slam::col_sums function (x, na.rm = FALSE, dims = 1, ...) UseMethod("col_sums") &lt;environment: namespace:slam&gt; &gt; # We can tell help to look in the slam package now that we know &gt; # where the function is from &gt; help(col_sums, package = "slam") &gt; # alternatively &gt; library(slam) &gt; ?col_sums &gt; # If we want to view the actual code for col_sums we need to &gt; # do a little work too &gt; methods("col_sums") [1] col_sums.default* col_sums.simple_triplet_matrix* Non-visible functions are asterisked &gt; # We probably want the default version? Otherwise change to the other one &gt; getAnywhere("col_sums.default") A single object matching ‘col_sums.default’ was found It was found in the following places registered S3 method for col_sums from namespace slam namespace:slam with value function (x, na.rm = FALSE, dims = 1, ...) base:::colSums(x, na.rm, dims, ...) &lt;environment: namespace:slam&gt; </code></pre> <p>So the <code>col_sums</code> function is just a wrapper for the base function colSums.</p>
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    1. POCan't find documentation for R function row_sums and col_sums
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    1. POCan't find documentation for R function row_sums and col_sums
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    1. COThank you for an answer that not only answers my question re: col_sums; but which shows me how to be a better R user in the future. Really a great answer. Thanks.
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      1. UScforster
    2. CO+11 for the walk through and for taking a step further and showing how to find the source code as well! Well done
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      1. USRicardo Saporta
    3. CO@RicardoSaporta - +11 - Outrageous! :-)
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      1. USthelatemail
 

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