I have a list of suffixes I want to turn into file names with extensions.
suff<- c("C1", "C2", "C3")
paste("filename_", suff[[1]], ".ext", sep="")
[1] "filename_C1.ext"
How do I use lapply() on that call to paste()?
What's the right way to do this:
filenames <- lapply(suff, paste, ...)
?
Can I have lapply() reorder the arguments to FUN?
I think you're confused about the need for lapply -- paste is
vectorized so this
paste("filename_", suff, ".ext", sep = "")
will work. But if you want to use lapply (for whatever reason) try this:
lapply(suff, function(x) paste("filename_", x, ".ext", sep =
"")
Michael
On Wed, Mar 28, 2012 at 2:31 PM, Ed Siefker <ebs15242 at gmail.com>
wrote:> I have a list of suffixes I want to turn into file names with extensions.
>
> suff<- c("C1", "C2", "C3")
> paste("filename_", suff[[1]], ".ext", sep="")
> [1] "filename_C1.ext"
>
> How do I use lapply() on that call to paste()?
> What's the right way to do this:
>
> filenames <- ?lapply(suff, paste, ...)
>
> ?
>
> Can I have lapply() reorder the arguments to FUN?
>
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suff isn't a list, so lapply() isn't the right choice. How about instead:> suff<- c("C1", "C2", "C3") > sapply(suff, function(x)paste("filename_", x, ".ext", sep=""))C1 C2 C3 "filename_C1.ext" "filename_C2.ext" "filename_C3.ext" On Wed, Mar 28, 2012 at 2:31 PM, Ed Siefker <ebs15242 at gmail.com> wrote:> I have a list of suffixes I want to turn into file names with extensions. > > suff<- c("C1", "C2", "C3") > paste("filename_", suff[[1]], ".ext", sep="") > [1] "filename_C1.ext" > > How do I use lapply() on that call to paste()? > What's the right way to do this: > > filenames <- ?lapply(suff, paste, ...) > > ? > > Can I have lapply() reorder the arguments to FUN? >-- Sarah Goslee http://www.functionaldiversity.org