[Scilab-users] Problem with Matrix operation

[Jean-Yves Baudais]

Hello,

Le 25/04/2017 à 15:29, SCHULZ Wolfgang a écrit :
> Hello,
> I want to set certain elements of a matrix to 1. Interestingly the following code fills 9 elements with 1. I expected to have only 3 elements (with index 1,1; 2,2 and 3,3) filled with 1.
>
> A=zeros(5,3)
> inx=[1 2 3];
> iny=[1 2 3];
> A(inx,iny)=1


Using this is for submatrix but what you want is not a submatrix. In 
your special case A=eyes(5,3)


> Is there any way to fill a matrix with 1 where I have the indexes in 2 vectors?


IMHO only the for loop works, in general...

Jean-Yves