Computes the discrete fourier transform of data in r and returns it. Data in
r isn't changed. R must be a forward range or a range with a length property.
It must have complex or floating point elements. Here a complex type is a type
with assignable floating point properties re and im. The number of elements
in r must be a power of two. T must be a floating point type. The length
of the returned array is the same as the number of elements in r.
Computes the discrete fourier transform of data in r and returns it. Data in r isn't changed. R must be a forward range or a range with a length property. It must have complex or floating point elements. Here a complex type is a type with assignable floating point properties re and im. The number of elements in r must be a power of two. T must be a floating point type. The length of the returned array is the same as the number of elements in r.