MATLAB: How to find all zero values in a matrix

Question

Hello,

I am wondering first how can I do to detect the number of zero values and their position in a large matrix.Secondly, how can i delete it.

Exemple:

A=

1 0,1 1

2 0.7 0

3 0.9 2

4 1.7 0

Number of zero values:2

position: A(2,3);A(4,3)

Thanks in advance

Answer 1

A=[1 0.1 1;2 0.7 0;3 0.9 2;4 1.7 0]
[ii,jj]=find(~A)