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Need for explication of this code

Asked by Rmc Yasmina on 23 Oct 2019
Latest activity Answered by CAM
on 24 Oct 2019
I need explication of this code
V=(1:50);
I=3;
J=4;
M=[];
for i=1:J:I*J
M=[M;V(i:i+I)];
end;

  2 Comments

Ruger28
on 23 Oct 2019
This "code" isn't even finished...
Put a breakpoint in this line:
M=[M;V(i:i+I)];
and see what is happening in each iteration

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1 Answer

Answer by CAM
on 24 Oct 2019
 Accepted Answer

"i" starts with 1. M becomes [V(1:(1+3))] = [1:4] = [1 2 3 4].
"i" becomes 5 = (1+J) = (1+4). M adds a row with [5 6 7 8]. Etc...
Ultimately, this will give you the numbers 1 through 12 in a 4x3 matrix.
1 2 3 4
5 6 7 8
9 10 11 12
Why use all that code when you could use: M=reshape([1:12], 4,3) ?

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