[R] Using if statement on function
murdoch.duncan at gmail.com
Mon Jun 28 14:59:04 CEST 2010
On 28/06/2010 5:50 AM, Etienne Stockhausen wrote:
> Hello everybody,
> I'm trying to use a if-statment on a function. For a better
> understanding I want to present a small example:
> FUN=mean # could also be median,sd or
> any other function
> if (FUN == mean)
> if (FUN == median)
> This doesn't work, because FUN is a function. I've already tried to
> coerce the type of FUN with as.character( ), but that's also not
> possible. I'm stuck with this task and it is absolutely necessary to
> give FUN the class of a function.
> I'm looking forward for any hints, clues or solutions for my problem.
You should use identical() to compare two functions:
> FUN <- mean
> identical(FUN, mean)
> identical(FUN, median)
all.equal() is probably sufficient for your needs, but it will ignore
some small differences.
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