Matrices and indexing ?!

I have two variables with the same set of values Lx= (5,7,9,11,13,15) Ly=(5,7,9,11,13,15) and I want to tell Matlab to choose the combinations of Lx and Ly under the condition Lx/Ly =< 2 eg: 5*5 , 7*5, 7*7, 9*5, 9*7, 9*9 and so on, What should be written ? I don’t want it to multiply both numbers just a combination as they are to be used as inputs for the following steps

[James Tursa]

What does "Lx/Ly = 2" mean? Your example doesn't seem to fit.

[Ahmed Yassin]

Sorry, It’s a typo I meant less than or equal 2

Answer 1

[James Tursa]

[LX,LY] = ndgrid(Lx,Ly);
z = LX(:)./LY(:) <= 2;
LX = LX(z);
LY = LY(z);

LX and LY contain the number pairs that match the condition.