MATLAB: Delete zeros from matrix

homeworkmatrix zeros delete

How do I delete all the columns that have zeros with a for loop? I tried reducing the number of columns by one in every iteration but matlab shows me "index exceeds matrix dimentions".
p4 = [0 0 31 37 43 47; 0 0 19 13 7 3];
grammes = size(p3,1);
sthles = size(p3,2);
for i = 1 : grammes
for j = 1 : sthles
if iszero(p3(i,j)) == 1
p3(:,j) = [];
sthles = sthles – 1
end
end
end

Best Answer

Here is how using FOR-LOOP to delete zero column(s)
A = [0     0    31    37    43    47;
     0     0    19    13     7     3];
[m,n] = size(A);
for j = n:-1:1 % must loop reversing
    deleteflag = true;
    for i = 1 : m
        if A(i,j) ~= 0
            deleteflag =  false;
        end
    end
    if deleteflag % only true if the entire column #j contains 0s
        A(:,j) = [];
    end
end
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