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)
plot(...)
if (FUN == median)
plot(...)
...
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)
[1] TRUE
> identical(FUN, median)
[1] FALSE
all.equal() is probably sufficient for your needs, but it will ignore
some small differences.
Duncan Murdoch
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