I am sorry if this is documented in apply's dcumentation or completely
obvious, I could not find or work it out.
Given an matricies Q: 2x3, R:1x3 and S:1x2
apply(Q, 1, '-', R) is 3x2 and apply(Q, 2, '-', S) is 2x3
Why?
cheers
Worik
> Q
[,1] [,2] [,3]
[1,] 1 2 3
[2,] 10 11 12
> R
[1] 1 4 7
> S
[1] 1 4
> apply(Q, 1, '-', R)
[,1] [,2]
[1,] 0 9
[2,] -2 7
[3,] -4 5
> apply(Q, 2, '-', S)
[,1] [,2] [,3]
[1,] 0 1 2
[2,] 6 7 8
>
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