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From: jbs@en.ecn.purdue.edu (Spaggie)
Newsgroups: comp.dsp
Subject: Check of an FFT routine...
Summary: does it work?
Message-ID: <1991Apr4.004750.15969@en.ecn.purdue.edu>
Date: 4 Apr 91 00:47:50 GMT
Sender: jbs@ecn.purdue.edu
Distribution: usa
Organization: Purdue University Engineering Computer Network
Lines: 60

I have put together a program to do an FFT of any array of
data, but it doesn't seem to get the imag. part correct.
Can someone verify if this data is correct or not?

Data given to program, 32 data points..
---------------------------------------
-0.005093
-0.003797
-0.001432
0.004374
0.001606
0.000027
-0.004548
0.000919
0.005288
-0.004973
-0.001283
-0.001970
0.002802
0.007448
-0.000214
-0.006771
-0.004697
0.002116
0.003964
0.002788
-0.000533
-0.003011
-0.000788
0.000005
-0.000852
0.003107
-0.001298
-0.000009
0.001896
-0.002197
0.000841
-0.000112

	my fft routine then yeilds this..
Real, Imaginary
-------------------
-0.000200,-0.000000
-0.000201,-0.000001
-0.000212,0.000010
-0.000223,-0.000053
-0.000722,-0.000263
0.000427,0.000433
-0.001282,-0.000314
0.000184,0.001059
0.000162,0.000016
0.000187,0.000170
-0.000096,-0.000125
-0.000621,0.000399
0.000027,0.000028
0.000258,-0.000585
-0.000188,-0.000254
-0.000111,0.000147
 
	Can anyone verify this as being correct?