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.
Cheers
Jannis
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