Two for loops in MATLAB, one not working

Question

I have some code which is running regressions,

I got some great code on stack overflow, yesterday, which helps to insert the x variables.

  %My attempt a Minimal, Complete, and Verifiable example
clear; 
% K: horizon
Myarbitrarycombinations= [7 8; 7 4;];

for ii=size(Myarbitrarycombinations,1)
 for j = [1, 2, 3];
     K=j;

Myarbitrarycombinations(ii,1)
Myarbitrarycombinations(ii,2)



end 
end

The problem I am having is with the "K" for loop, in the above code.

The code is returning

K=1, 7 4
K=2, 7 4
K=3, 7 4

However, I would like it to return,

K=1, 7 4
K=2, 7 4
K=3, 7 4

and

K=1, 7 8
K=2, 7 8
K=3, 7 8

Answer 1

Your problem is in this for loop:

for ii=size(Myarbitrarycombinations,1)

size(...,1) is a scalar (2). This is the same as

for ii=2

meaning that it iterates only once. Instead, do:

for ii=1:size(Myarbitrarycombinations,1)
%      ^^^