How to program a nested loop with a matrix?

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Rose 2018-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/390334-how-to-program-a-nested-loop-with-a-matrix

回答： Adnan Haider 2021-12-1

采纳的回答： Abraham Boayue

Nested loop: Write a program to create a 4x4 matrix for which each entry is computed as follows: A(i,j) = 2i-j.

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Greg 2018-3-24

What have you tried?

We aren't here to do your homework for you.

Rose 2018-3-24

Sorry Greg, I didn't want to give the impression that I'm not trying! I'm just a bit confused about exactly what this question is asking. Any thoughts to clarify the procedure (not the exact code) would be appreciated :)

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Answer 1

Abraham Boayue 2018-3-24

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Hey Rose, since the size of your matrix is going to be 4x4, you will need to do the following to achieve your goal.

1. Initialize A to a 4x4 zero matrix since that's how much space you need.
 N = 4; this is the number of rows
 M = 4; number of columns
 A = zeros(N,M); % 4x4 matrix
2. write your double for loops
for i = 1 : N
    for j = 1: M
      write your code here (It will be just a single line code)
      read about how for loop works, it is one of the basis of programming.
    end
end