[R] two questions

[Ron Wehrens]

On Monday 15 April 2002 14:54, 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?
> Thank you.
>            Alessandro

A[,-1] and A[-1,] give you matrix A without the first column or row, 
respectively.

Ron
-- 
Ron Wehrens            
Dept. of Chemometrics  
University of Nijmegen	Email: rwehrens at sci.kun.nl
Toernooiveld 1		http://www-cac.sci.kun.nl/cac/
6525 ED Nijmegen	Tel: +31 24 365 2053
The Netherlands		Fax: +31 24 365 2653

     

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