adding matrices with different dimensions

I got an equation similar to this : X-sin(thita). size(X) = 1x50 size(thita) = 1x180.

My output should be a matrix of 50x180. It could be done easily by using 2 for-loop but i am trying to find something more efficient. I tried bsxfun() but i could not manage it.

Thanks in advance

Answer 1

[David Young]

Convert X to a column vector. Then bsxfun will do what you want.

For example

X = rand(1, 50);
thita = rand(1, 180);
Xthitadiffs = bsxfun(@minus, X.', sin(thita));  % transpose on X makes column

Answer 2

[Mischa Kim]

Dimitrios, you mean something like

 X     = 1:50;
 theta = (1:180)*pi/180;
 mat   = repmat(X',1,numel(theta)) - repmat(sin(theta),numel(X),1);

[David Young]

It's a good idea to use .' rather than ' for transposing X, because ' takes the complex conjugate. We don't know for sure that X is always real.