How can I select all the nonzero elements of a matrix and give out a matrix?

How can I select all the nonzero elements of a matrix and give out a matrix?

MatrixAo = find(MatrixA(:)~=0)

This only gives the indices back... Is there any better command?

Thanks a lot!

[José-Luis]

And regarding your previous question: don't use globals, you will save someone (probably yourself) a world of hurt in the future.

[Simon]

I will remember this advice!

Answer 1

[Andrei Bobrov]

MatrixAo = MatrixA(abs(MatrixA) > eps(100));

[José-Luis]

eps(100) strikes me as arbitrary. Is there any reason you picked that value?

[Simon]

Hi. thanks for your answer. As Jose Luis already asked: Why did you picked the abs and eps?

[José-Luis]

Because of numerical precision issues.

[Andrei Bobrov]

Hi, Jose! Yes, it as arbitrary, from my experience.

Answer 2

[José-Luis]

your_mat = A(A~=0);

And if you want a sparse matrix:

your_mat = sparse(A);

[Simon]

Thanks :)

Answer 3

[Sachin Ganjare]

Try this:

MatrixAo = MatrixA(MatrixA~=0)

[Simon]

Thanks!