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POskip to next value of loop upon error in R [tryCatch]
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copied!<p>I've read a few other SO questions about <code>tryCatch</code> and cuzzins, as well as the documentation:</p> <ul> <li><a href="https://stackoverflow.com/questions/2622777/exception-handling-in-r">Exception handling in R</a></li> <li><a href="https://stackoverflow.com/questions/2158780/r-catching-an-error-and-then-branching-logic">catching an error and then branching logic</a></li> <li><a href="https://stackoverflow.com/questions/3903157/how-can-i-check-whether-a-function-call-results-in-a-warning">How can I check whether a function call results in a warning?</a></li> <li><a href="http://r.789695.n4.nabble.com/problems-with-plots-in-loop-corrected-Email-td3597451.html" rel="noreferrer">Problems with Plots in Loop</a></li> </ul> <p>but I still don't understand.</p> <p>I'm running a loop and want to skip to <code>next</code> if any of a few kinds of errors occur:</p> <pre><code>for (i in 1:39487) { #ERROR HANDLING this.could.go.wrong <- tryCatch( attemptsomething(), error=function(e) next ) so.could.this <- tryCatch( doesthisfail(), error=function(e) next ) catch.all.errors <- function() { this.could.go.wrong; so.could.this; } catch.all.errors; #REAL WORK useful(i); fun(i); good(i); } #end for </code></pre> <p><em>(by the way, there is no documentation for <code>next</code> that I can find)</em></p> <p>When I run this, <code>R</code> honks:</p> <pre><code>Error in value[[3L]](cond) : no loop for break/next, jumping to top level </code></pre> <p>What basic point am I missing here? The <code>tryCatch</code>'s are clearly within the <code>for</code> loop, so why doesn't <code>R</code> know that?</p>

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