it does not work ,why?
a=[1 ,2 ,3 ,4] b=[7 8 9 5] foo=x->fft(x,2) foo.(b) #print(fft(b,2))
It’s not clear what you really want to do.
foo.(b), written with the dot, is asking
foo, and thus
fft, to act element-wise on
fft requires an