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simplefft — Simple FFT algorithm
gint gwy_fft_hum (gint dir, gdouble *re_in, gdouble *im_in, gdouble *re_out, gdouble *im_out, gint n); void gwy_fft_window (gdouble *data, gint n, GwyWindowingType windowing);
gint gwy_fft_hum (gint dir, gdouble *re_in, gdouble *im_in, gdouble *re_out, gdouble *im_out, gint n);
Performs FST algorithm.
dir : | direction (1/-1) |
re_in : | real part of input data |
im_in : | imaginary part of input data |
re_out : | real part of output data |
im_out : | imaginary part of output data |
n : | number of data points |
Returns : | zero at success. |
void gwy_fft_window (gdouble *data, gint n, GwyWindowingType windowing);
Multiplies data by given window.
data : | data values |
n : | number of data values |
windowing : | method used for windowing |
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