Question

Write a function called ZeroCornersSecondRow that sets the corners of a 2D array to zero and also outputs the second row. The input arguments: • inArray: A double precision 2D array of size nxn, where n is at least 3. The output arguments: outArray: A double precision 2D array of size nxn that is a copy of inArray except with the corners set to zero. • secondRow: A double precision 1D array of size n. This is the second row of inArray.. For example, inArray = 15 2 3; 3 3 5; 146) outArray, secondRow - ZeroCornersSecondRow(inArray) This results in the output: outArray = 1 0 2 0; 335; @ 4O] secondRow = [335] The top left, top right, bottom left, and bottom right corners of the input array have been set to zero

Answer 1

function [outArray, secondRow] = ZeroCornersSecondRow(inArray)

    % compute size n of array

    n =size(inArray,1);

    % copy inArray to outArray

    outArray=inArray;

    % copy second row

    secondRow=inArray(2,:);

    % set first element of first row to 0

    outArray(1,1) = 0;

    % set last element of first row to 0

    outArray(1,n) = 0;

    % set first element of last row to 0

    outArray(n,1) = 0;

    % set last element of last row to 0

    outArray(n,n) = 0;

end

.

testing.m:

inArray=[5 2 3;

3 3 5;

1 4 6];

[outArray, secondRow] = ZeroCornersSecondRow(inArray)

.

Output:

outArray II 2 3 3 5 4 secondRow 3 35

.