[R] probably need to se sapply but i can't get it

[Thomas Lumley]

On Mon, 26 Jun 2006, markleeds at verizon.net wrote:

> Hi : I think I need to use sapply but I can't figure this out.
>
> Suppose I have two vectors : tempa ( 4, 6,10 ) and  tempb
> (  11,23 ,39 )
>
>
> I want a function that returns 4:11,6:23 and 10:39 as vectors.
>
> I tried :
>
> sapply(1:length(tempa) function (z) seq(tempa[z],tempb[z])
>
> but i got 3 really strange vectors back in the sense that the numbers in them did not make no sense to me. obviously,
> i must be doing something wrong.  thanks a lot.

An easier way to do this is
   mapply(seq,tempa,tempb)

Your approach should have worked. It's hard to tell why it didn't because 
there are two syntax errors in your example so it clearly isn't actually 
what you did.  Fixing them, I get
> sapply(1:length(tempa), function (z) seq(tempa[z],tempb[z]))
[[1]]
[1]  4  5  6  7  8  9 10 11

[[2]]
  [1]  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

[[3]]
  [1] 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
[26] 35 36 37 38 39

as you wanted.

 	-thomas