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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Super, thanks for this<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">David <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:DA">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:DA"> Søren Højsgaard
[mailto:sorenh@math.aau.dk] <br>
<b>Sent:</b> 25. marts 2014 11:03<br>
<b>To:</b> David Edwards; 'rcpp-devel@lists.r-forge.r-project.org'<br>
<b>Subject:</b> RE: Getting names<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:#1F497D">Something like this?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier New";color:#1F497D">x <- c(a=1, b=2)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New";color:#1F497D">f <- cppFunction("CharacterVector foo(NumericVector x){return x.names();}")</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New";color:#1F497D">> f(x)</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New";color:#1F497D">[1] "a" "b"</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New";color:#1F497D">Søren</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-family:"Courier New";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:DA">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:DA">
<a href="mailto:rcpp-devel-bounces@lists.r-forge.r-project.org">rcpp-devel-bounces@lists.r-forge.r-project.org</a> [<a href="mailto:rcpp-devel-bounces@lists.r-forge.r-project.org">mailto:rcpp-devel-bounces@lists.r-forge.r-project.org</a>]
<b>On Behalf Of </b>David Edwards<br>
<b>Sent:</b> 25. marts 2014 10:45<br>
<b>To:</b> 'rcpp-devel@lists.r-forge.r-project.org'<br>
<b>Subject:</b> [Rcpp-devel] Getting names</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Another novice question: the function</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">// [[Rcpp::export]]</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">IntegerVector maketable(IntegerVector x) {</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""> IntegerVector tab=table(x);</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""> return tab;</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">}</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">returns a named vector, and is about twice as fast as the R function ‘table’. Is there a way to extract the names of the vector as a CharacterVector (or even
better here, as an IntegerVector)?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">BR David</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""> </span><o:p></o:p></p>
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