How can one create this matrix?

I want to create a matrix like

1 1
1 2
1 3
1 4
1 5
2 1
2 2
2 3
..

That is, I start from

grids=1:1:5 

and I want to repeat this "grids" in the second column. Please advise.

Answer 1

[madhan ravi]

 [X, Y] = meshgrid(1:5);
 [X(:), Y(:)]

Answer 2

[Alan Stevens]

This will do it:

n = 5; reps = 4;
c1 = ones(n,1)*(1:reps); c1 = c1(:);
c2 = (ones(reps,1)*(1:n))'; c2=c2(:);
M = [c1 c2];

[madhan ravi]

But why so complicated? And the first column doesn’t have 5 in it? In fact a simple call to ndgrid() or meshgrid() would do the job?

[Alan Stevens]

You are right that there are probably easier ways to do it (use of meshgrid would indeed be better, but I just didn't think of it!)

The first column doesn't have a 5 in it because it wasn't clear to me that the op wanted the same number of repeats as grids.

[alpedhuez]

Thank you any way.