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Remove the air bubbles

Given a matrix a, return a matrix b in which all the zeros have "bubbled" to the top. That is, any zeros in a given column should be moved to the top. The order of the remaining nonzero numbers in the column should be preserved.

Input a = [ 1 2 3

                  0 4 5

                  6 0 0 ]

Output b is [ 0 0 0

                     1 2 3

                      6 4 5 ]

MATLAB CODE:


clc
x=input('Enter the matrix:');
[r c]=size(x);
zo=[];
for j=1:c
    Y=[];
    for i=1:r
        Y=[Y x(i,j)];
    end
     d=0;
        for u=1:r
            if(Y(u)==0)
                d=d+1;
            end
        end
        t=[];
        for rp=1:d
            t=[t 0];
        end
        for h=1:r
            if(Y(h)~=0)
                t=[t Y(h)];
            end
        end
        zo=[zo t'];
end
disp(zo);

Explanation:



        
Sample Output:



Function:

function zo = bubbles(x)

[r c]=size(x);
zo=[];
for j=1:c
Y=[];
for i=1:r
Y=[Y x(i,j)];
end
d=0;
for u=1:r
if(Y(u)==0)
d=d+1;
end
end
t=[];
for rp=1:d
t=[t 0];
end
for h=1:r
if(Y(h)~=0)
t=[t Y(h)];
end
end
zo=[zo t'];
end


end

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