How can i zeroing elements in a matrix?

Well, My task is the following: i have a wav file, that i need to fft, then i load it to a matrix. I want to zeroing the first 10000 elements of the matrix. How can i do that?

Answer 1

[Wayne King]

I'll assume you have a 1-D vector, if that vector is X, then just

   X(1:1e4) = 0;

If this is not what you mean, please be more specific.

[Dionysios Gkonis]

if the matrix is n*n, how do you zero a row ?

[DGM]

Doesn't matter whether it's square or not. Just address all elements of the row.

A = randi(9,4,4)

A = 4×4

2 5 4 6 5 1 7 1 4 6 8 6 1 3 7 9

A(2,:) = 0 % row 2, all columns

A = 4×4

2 5 4 6 0 0 0 0 4 6 8 6 1 3 7 9