[R] two questions

Göran Broström gb at stat.umu.se
Mon Apr 15 15:47:18 CEST 2002

On Mon, 15 Apr 2002, Ambrosini Alessandro wrote:

> The first: if I have a vector as (1,1,3,2,1,1), which is the command that
> gives all the positions of the min value? From the vector of the example a
> would like to obtain a new vector as (1,2,5,6) that give me all the
> positions of the minimum value 1.

> x <- c(1,1,3,2,1,1)
> which(x == min(x))
[1] 1 2 5 6

> The second: if I have a matrix "A" and I want to obtain a new matrix
> deleting a column or a row of A, what have I to do?
> Thank you.

A[-1, ] removes the first row, etc.


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