FFT library

[Adam]

hello
I'm looking for library which has function to calculate Fast Fourier
Transform. I'd prefer freeware version, but if there isn't any other might
be some in low prise.

thanks in advanse
Adam

P.S. I'm programing in C++ Builder 6 - so I hope my question isn't on NTG ?

[puzzlecracker]

Adam wrote:

hello
I'm looking for library which has function to calculate Fast Fourier
Transform. I'd prefer freeware version, but if there isn't any other might
be some in low prise.
nt g
thanks in advanse
Adam

P.S. I'm programing in C++ Builder 6 - so I hope my question isn't on NTG ? you won't find it here. look in more relevent groups.

best regards,
me

[Tatu Portin]

Adam wrote:

hello
I'm looking for library which has function to calculate Fast Fourier
Transform. I'd prefer freeware version, but if there isn't any other
might be some in low prise.

thanks in advanse
Adam

P.S. I'm programing in C++ Builder 6 - so I hope my question isn't on NTG ?

A fast, free C FFT library; includes real-complex, multidimensional,
and parallel transforms. Benchmarked against many other FFTs.

http://www.fftw.org/

[Adam]

hello

I've tried to use library from this side > http://www.fftw.org/- its look
well, but i.ve some problems:
I wrote code:

int n=100;
double in[n];
fftw_complex out[n];

// here functions filling "in" table with data

const fftw_plan planik = fftw_plan_dft_r2c_1d(int n, double *in,
fftw_complex *out,
unsigned flags);

and in line aboveocure an error: "expected primary expresion before int"
I wrote this code using tutorial to this library - so I don't know why this
ocure.

best regards Adam