# [PYTHON MATRIX-SIG] FFT

**Duncan Child
**
djc@lct.com

*Thu, 6 Mar 97 16:19:54 CST*

Hello all,
Having much fun with Numeric Python but I am a bit confused
by the FFT module. Any suggestions gratefully accepted as to
what is wrong with the following:
#!/usr/local/bin/python
from Numeric import *
from FFT import *
raw_a = array ( [ 1.3 , 1.2, 1.5, 1.4 ] )
print "raw_a ",raw_a
freq_a = real_fft (raw_a)
print "freq_a ",freq_a
prep_b = inverse_real_fft (freq_a)
print "prep_b ",prep_b
print "length of arrays: ",len(raw_a),len(freq_a),len(prep_b)
If I swap fft for real_fft and inverse_fft for inverse_real_fft the
results seem OK.
Thanks
Duncan
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