Help in Matlab please. Need to write a code for this function. function [ X ] =

Question

Help in Matlab please. Need to write a code for this function.

function [ X ] = myTightenImage( X )

a. INPUTS: i. A 2D matrix X

b. FUNCTIONALITY: i. This function looks through each row of X, and removes it from X if it only contains 0s.

ii. This function looks through each column of X, and removes it from X if it only contains 0s.

c. OUTPUTS:

i. An updated version of X in which every row and column contains at least one non-zero number

d. HINTS:

i. You can remove rows 7 through 8 of X with this statement: X(7:8, :) = [];

ii. You can remove cols 2, 4, 5, 9 of X with this statement: X(:, [2 4 5 9) = [];

iii. You can find which columns of X have non-zero numbers with this statement: any(X, 1);

iv. You can find which rows of X have non-zero numbers with this statement: any(X, 2);

v. You can find which rows of X have all zeros with this statement: ~any(X, 2);

e. TEST CASES:

>> A = [0 0 0 0 0; 1 2 3 4 5; 6789 9; 2 4684]; >>myTightenImage (A) ans = >> A = [0 0 0 0 0; 0 1 2 3 4 000 1 0 0 2 4 6 0 >>myTightenImage (A) ans = 0

Explanation / Answer

Matlab Code

function [ A ] = myTightenImage( A )
B = any(A,2);
for i=1:length(B)-1
    if(B(i)==0)
        A(i,:)=[];
    end
end
C = any(A,1);
for i=1:length(C)-1
    if(B(i)==0)
        A(:,i)=[];
    end
end
end

Sample Output

A = [0 0 0 0 0; 0 1 2 3 4; 0 0 0 1 0; 0 2 4 6 0];

myTightenImage(A)

ans =

     1     2     3     4
     0     0     1     0
     2     4     6     0

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