[R] group length

Scott Chamberlain
Thu, 12 May 2011 16:56:15 -0000

require(plyr)
laply(list(y1, y2, y3, y4), length)

Scott
On Thursday, May 12, 2011 at 11:50 AM, Asan Ramzan wrote:
Hi
>
> I have four groups
>
> y1=c(1.214,1.180,1.199)
> y2=c(1.614,1.710,1.867,1.479)
> y3=c(1.361,1.270,1.375,1.299)
> y4=c(1.459,1.335)
> Is there a function that can give me the length for each, like the made up
> example below?
>
> > function(length(y1:y2)
> [1] 3 4 4 2
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