** Next power of two. **

** NEXTPOW2(N) returns the first P such that 2^P >= abs(N). It is **

** often useful for finding the nearest power of two sequence **

** length for FFT operations. **

** NEXTPOW2(X), if X is a vector, is the same as NEXTPOW2( LENGTH (X)). **

** **

** **

** See also LOG2 . **

** **