meaning of numpy.fft coefficients

[Joey]

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!

information provided by numpy reference says Ak = Sum of a[m] *
exp{-2*pi * i * m * k / n} for m from 0 to n-1

Which part is a and which part is b and what is the meaning of each
part?

Thx in adv.

 

[Corey Richardson]

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)

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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