[R] two questions

Uwe Ligges ligges at statistik.uni-dortmund.de
Mon Apr 15 15:22:08 CEST 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.

 which(x == min(x))

> 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?

A.new <- A[-k,]  # delete the k-th row
A.new <- A[-k,]  # delete the k-th column

Uwe Ligges
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