Create a 2d matrix with two nested cycle

Hi all,

I am trying to create a 2d matrix with two nested cycle. My code is really complex, so I have written a very simple version of the problem. The scope of this simplified code was to obtain

[1 2 3 4

1 2 3 4

1 2 3 4

1 2 3 4]

So I have written a code like this

A=[]
B=[]
for x=1:1:4
    for y=1:1:4
        B=[B;y]
    end
    A=[A,B]
end

The problem seems to me that the nested cycle continue to append the value of y also once the cycle is ended. So when I do A=[A,B], I have the error that the array concatenated are not consistent.

I hope you can help me.

PS I know that this example of matrix can be obtained very easily, I want to obtain it using the nested cycles.

Answer 1

[Rik]

Dynamically growing arrays is a bad idea. You should probably provide more details about your actual goal, because this problem definition doesn't make sense.

A=[];
for x=1:1:4
    B=[];%reset B every loop of A
    for y=1:1:4
        B=[B;y];
    end
    A=[A,B];
end
A