Matlab and preparing matrix lines

[hokhani]

In the Matlab program below

U=[210; 100; 150]
ky= linspace(-.2,.2);
qx=sqrt(((150-U)/.2)^2-ky.^2)

I want to have qx as a matrix in which each row is corresponding to one value of U: the first row corresponds to 210, the second to 100 and ... How should I do this? (I want to avoid the "for loop" if possible).

 

[RUber]

One way would be to make intermediate matrices so that the dimensions agree.
U2 = U * ones(1,100);
Y2 = ones(3,1)*ky;
Then your function will be referring to the same index in both reference matrix.
There might be a better way that is more effecient with your storage space, but for reasonably sized problems, this would do the trick.