[R] How to divide each column with its own value

[Berend Hasselman]

On 17-09-2012, at 07:31, Jha, Ashutosh Kumar wrote:

> Dear Berend,
>  
> No need to devide what all you need a indentity matrix with same dimesion.
>   Following is one way to achieve this.
>  
>   mat<-matrix(1,ncol=ncol(mat),nrow=nrow(mat)).

That is not an identity matrix. It is a matrix with all elements equal to 1.
An identity matrix has 1 on the diagonal and 0 elsewhere and is created by diag(..)

The OP asked about divide and the answer I gave was geared to that specific question.
Of course if the result is a constant value for all elements a simple matrix(...) will also do.

Berend
>  
> Regards
> Ashutosh
> 
> 
> On Monday, 17-09-2012 on 10:58 Berend Hasselman wrote:
> On 17-09-2012, at 06:50, s.s.m. fauzi wrote:
> 
> > Hi,
> > 
> > I have a matrix as below:
> > 
> > mat=
> >     [,1]  [,2]  [,3]
> > [1,]    1    4    7
> > [2,]    2    5    8
> > [3,]    3    6    9
> > 
> > What I want to do is, I would like to divide each column with its own
> > value, in order to get value 1.
> > Is there any simple script for that?
> 
> mat/mat
> 
> Berend
> 
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