storing values of for loop in a matrix

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Sumera Yamin
Sumera Yamin on 2 Feb 2021
Commented: Sumera Yamin on 2 Feb 2021
Hi, i have a basic problem. i am using nested for loops x and y and calculating variable z. the variable z is over written at each iteration. at the end of loops, i want to have the variable z matrix. The x is 1xm vector, and y=1xn vector, how would i get the data matrix for z, where z=mxn. i use a simple test code below. Many thanks for any help
for i=1:length(x)
for j=1:length(y)

Accepted Answer

Stephen on 2 Feb 2021
Edited: Stephen on 2 Feb 2021
x = -60:0.5:-50;
y = -10:0.5:-5;
z = nan(numel(x),numel(y)); % better to preallocate array.
for i = 1:numel(x)
for j = 1:numel(y)
z(i,j) = x(i)+y(j); % indexing to allocate value to z.
  1 Comment
Sumera Yamin
Sumera Yamin on 2 Feb 2021
hi, many thanks for your quick response. this works perfectly.

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