formal initialisation of matrix

Hi,

I would like to know if it's possible to create a matrix A by giving the value of every coefficient A(i,j). Something like that :

A(i,j) = i+j

I would like to do this directly when the matrix is created, not using the double for i, for j.

Thankyou for your answer,

Answer 1

[lvn]

Answering your second question

A=bsxfun(@eq,x,y');

Answer 2

[Titus Edelhofer]

Hi Julien,

often you can use the function meshgrid for this...

Titus

Answer 3

[lvn]

Three alternative solutions posted here:

at stackoverflow

Answer 4

[Julien]

Thankyou for your rapid answer, it helps me a lot =)

Now if it's possible, I would like to construct a matrix of booleans based on the same idea but with :

A ( i , j ) = ( x(i) == y(j) )

with x and y known vector.

If somebody has idea..

Thanks a lot,

Answer 5

[Julien]

Perfect answer thankyou it's okay =)