How to generate the first twenty powers of x?

Question

So, I\'ve got X, a 300-by-1 vector and I\'d like [1, X, X*X, X*X*X, ... , X*X*...*X], a 300-by-twenty matrix.

How should I do this?

X=[2;1]
[X,X.*X,X.*X         


        

Answer 1

Use power. It raises something to the power of y, and repeats if y is a vector.

power(x,1:300)

edit: power and .^ operator are equivalent.