Esempio n. 1
0
func TestFFT(t *testing.T) {
	for _, ft := range fftTests {
		v := FFTReal(ft.in)
		if !dsputils.PrettyCloseC(v, ft.out) {
			t.Error("FFT error\ninput:", ft.in, "\noutput:", v, "\nexpected:", ft.out)
		}

		vi := IFFT(ft.out)
		if !dsputils.PrettyCloseC(vi, dsputils.ToComplex(ft.in)) {
			t.Error("IFFT error\ninput:", ft.out, "\noutput:", vi, "\nexpected:", dsputils.ToComplex(ft.in))
		}
	}
}
Esempio n. 2
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func TestFFTN(t *testing.T) {
	for _, ft := range fftnTests {
		m := dsputils.MakeMatrix(dsputils.ToComplex(ft.in), ft.dim)
		o := dsputils.MakeMatrix(ft.out, ft.dim)
		v := FFTN(m)
		if !v.PrettyClose(o) {
			t.Error("FFTN error\ninput:", m, "\noutput:", v, "\nexpected:", o)
		}

		vi := IFFTN(o)
		if !vi.PrettyClose(m) {
			t.Error("IFFTN error\ninput:", o, "\noutput:", vi, "\nexpected:", m)
		}
	}
}
Esempio n. 3
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// IFFTReal returns the inverse FFT of the real-valued slice.
func IFFTReal(x []float64) []complex128 {
	return IFFT(dsputils.ToComplex(x))
}