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POCasting closure to character in R
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  1. POCasting closure to character in R
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    copied!<p>I have data and a working summary function:</p> <pre><code>[data:] x = runif(100) [function 1:] sapply(list("mean", "median", "sd"), function(f) array(do.call(f, list(x)), dimnames=list(f))) mean median sd 0.5198142 0.5566567 0.3048372 </code></pre> <p>The following also runs, but without giving the <code>dimnames</code>:</p> <pre><code>[function 2:] sapply(list(mean, median, sd), function(f) array(do.call(f, list(x)))) [1] 0.5198142 0.5566567 0.3048372 </code></pre> <p>I have unsuccessfully tried various combinations of <code>quote()</code>, <code>enquote()</code>, <code>substitute()</code>, <code>deparse()</code> etc to give me the same results with function 2 (where the functions to be applied are not quoted) as I got from function 1. I would like to find something of the following form, if it exists, which yields the same results as function 1:</p> <pre><code>[function 3:] sapply(list(mean, median, sd), function(f) array(do.call(f, list(x)), dimnames=list(SOMEFUNCTION(f)))) </code></pre> <p>My understanding of the problem is I need to use function that will quote <code>mean</code>, <code>median</code> and <code>sd</code> but after <code>f</code> has been partially evaluated; all my attempts at this have failed. </p> <p>I started off writing the function like function 3; rewriting as function 1 was the only way I could get the desired output, however I can't help but feel that there is some way to achieve this without the quotation marks in function 1.</p> <p>As this area is a little confusing to me, could you please explain why your solution works, in addition to providing the code.</p> <p>Thanks.</p>
 

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