On 27/03/2014 12:46 PM, Jannis wrote:
On 27.03.2014 15:58, Duncan Murdoch wrote: > I would use a slightly less dirty hack: call globalVariables() to > declare that i is global. > > The foreach() function is using nonstandard evaluation to make this > work, and codetools (that does the checks) doesn't know all the ins > and outs of it. (foreach is in a contributed package, not base R.) > The globalVariables() function is a way to tell codetools that even > though it looks wrong, the variable is really being used safely. > > Duncan Murdoch >Thanks, Duncan, for your reply. So how would I use this now? Reading the documentation still leaves me puzzled .... Just adding globalVariables('i') to the dummy function like this: dummy = function() { globalVariables('i') dummyfun = function(iter) { iter * 2 } registerDoMC(4) results = foreach(i = 1:10) %dopar% dummyfun(iter = i) } does not solve the problem.
The call needs to be at the global level, i.e. outside the function. Duncan Murdoch ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
