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Mon, 06 Jan 2014 15:30:33 +0100
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I have another question concerning the FFT of the GSL. I wanted to start
low and tried to transform a sine signal.
Since I assume a data set I take into account real values and a length
of any magnitude. Thus I end up with Section 16.7: Mixed - radix FFT
routines for real data, am I right?
But to be honest I do not fully grasp between the two methods
real_transform and halfcomplex_transform. The first leads to an expected
\delta - peak while the second method leads to 'oscillating boundaries'.
Furthermore I am highly confused that the FFT functions only need the
data in the sense of the 'values' of a function and not the
corresponding x values.
I thought to be quiete familier with the fouriertransform by solving
equations with paper and pencil but this GSL implementation is curious.
Can someone give me a little more insight?
In the appendix is a minimal example together with a makefile.
Description: Text Data
Description: Text document
- [Help-gsl] FFT,
Klaus Huthmacher <=