remove the zeros in the Matrix

how to remove the zeros from matrix x??

clear all

clc

n=1;
m=1;
z=randi([1 10],5,10)
for i=1:5
    if(mod(i,2)==0)
        for j=1:length(z)
            if(mod(j,2)==0)
                x(m,n)=z(i,j)
                n=n+1;
            end
            
        end 
        m=m+1;
        
    end   
    
end

[dpb]

Depends on what you mean by "remove". A matrix cannot be anything but a rectangular array, so you simply cannot "remove" elements leaving "holes" in a regular array. A cell array also has to be regular, but it does have the feature that a cell may contain the empty indicator. For a regular numeric array, you can use NaN or Inf as missing value indicators, but you can't not have something in every location.

Answer 1

[DGM]

If all you want is the intersection of all even rows and columns, just use indexing.

z = randi([1 10],5,10)

z = 5×10

2 7 1 1 2 5 2 6 8 4 1 5 1 4 8 10 1 9 2 9 9 3 5 8 6 6 6 6 5 8 2 2 3 1 8 3 1 9 3 5 4 1 1 8 8 5 6 6 5 7

x = z(2:2:end,2:2:end)

x = 2×5

5 4 10 9 9 2 1 3 9 5

FWIW, the reason your code doesn't work is because you never reset n