Re: Apply function to vector

[James Sherman Jr.]

error: for A^b, A must be square

Mathematically, A^b means the power of the matrix, so for example, A^3 is A*A*A.  For this operation, you do need A to be square for the matrix multiplication to make sense.

If you want to take the power of each element in the matrix, you need to put a period "." before the carat to indicate that you want the power of each element, A.^3 will take each element in A and cube them.  This is the element-wise operations that you were reading about.

Hope this helps,