meaning of numpy.fft coefficients

Corey Richardson kb1pkl at aim.com
Sat Jul 9 02:52:23 CEST 2011


Excerpts from Joey's message of Fri Jul 08 20:14:29 -0400 2011:
> the list generated by numpy is of form [ a+bi, c+di, ...]
> 
> could anybody tell me the meaning of the coefficients a and b? I am
> very confused about fourier transform!
> 

a+bi is a typical complex number. a is the real part, b is the imaginary.
Python uses j,

>>> 4+5j
(4+5j)

http://en.wikipedia.org/wiki/Complex_number
http://docs.python.org/library/stdtypes.html#typesnumeric
-- 
Corey Richardson
  "Those who deny freedom to others, deserve it not for themselves"
     -- Abraham Lincoln
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