Question

I have a single row matrix theta in Matlab with a couple hundred values; I would like to create a vector for each value in theta. Preferably I can simply store these values in a list so I can take dot products of individual elements in the list lator; how would I go about doing this?

For now, the code I have is

arrayfun(@(x) [sin(x),0,cos(x)],thetas,'UniformOutput',false);

which generates a bunch of [1x3 double]‘s.

Answer 1

The output to your code is a cell array, whose elements are the 1×3 vectors you wanted. So suppose you assigned A = arrayfun(@(x) [sin(x),0,cos(x)],thetas,'UniformOutput',false); as you have up there. The vector corresponding with the ith element of array thetas may be accessed with A{i}. At this point you could use a for loop to construct a matrix whose ith column is the vector corresponding to the ith element of thetas.