API Documentation

Interpolation with fast Fourier transform (FFT)

`interpax_fft.rfft_interp1d`(f, n[, sx, dx])	Interpolation of a real-valued 1D periodic function via FFT.
`interpax_fft.rfft_interp2d`(f, n1, n2[, sx, ...])	Interpolation of a real-valued 2D periodic function via FFT.
`interpax_fft.irfft_interp1d`(c, nx, n[, sx, dx])	Interpolation of a 1D Hermitian Fourier series via FFT.
`interpax_fft.irfft_interp2d`(c, ny, n1, n2[, ...])	Interpolation of 2D Hermitian Fourier series via FFT.

`interpax_fft.idct_mmt`(x, a[, axis, vander])	Evaluate Chebyshev coefficients `a` at `x` ∈ [-1, 1].
`interpax_fft.ifft_mmt`(x, a[, domain, axis, ...])	Evaluate Fourier coefficients `a` at `x`.
`interpax_fft.interp_dct`(x, f[, lobatto, axis])	Interpolate `f` to `x` with discrete Chebyshev transform.
`interpax_fft.interp_rfft`(x, f[, domain, axis])	Interpolate real-valued `f` to `x` with FFT and MMT.
`interpax_fft.interp_rfft2`(x0, x1, f[, ...])	Interpolate real-valued `f` to coordinates `(x0,x1)` with FFT and MMT.
`interpax_fft.irfft2_mmt_pos`(x0, x1, a, n0, n1)	Evaluate Fourier coefficients `a` at coordinates `(x0,x1)`.
`interpax_fft.irfft_mmt`(x, a, n[, domain, axis])	Evaluate Fourier coefficients `a` at `x`.
`interpax_fft.irfft_mmt_pos`(x, a, n[, ...])	Evaluate Fourier coefficients `a` at `x`.
`interpax_fft.rfft2_modes`(n_fft, n_rfft[, ...])	Modes for complex exponential basis for real Fourier transform.
`interpax_fft.rfft2_vander`(x_fft, x_rfft, ...)	Return Vandermonde matrix for complex Fourier modes.
`interpax_fft.rfft_to_trig`(a, n[, axis])	Spectral coefficients of the Nyquist trigonometric interpolant.
`interpax_fft.trig_vander`(x, n[, domain])	Nyquist trigonometric interpolant basis evaluated at `x`.

`interpax_fft.DoubleChebyshevSeries`(f[, ...])	Real-valued 2D Chebyshev series.
`interpax_fft.FourierChebyshevSeries`(f[, ...])	Real-valued Fourier-Chebyshev series.
`interpax_fft.PiecewiseChebyshevSeries`(cheb)	Chebyshev series.

`interpax_fft.cheb_from_dct`(a[, axis])	Get discrete Chebyshev transform from discrete cosine transform.
`interpax_fft.cheb_pts`(n[, domain, lobatto])	Get `n` Chebyshev points mapped to given domain.
`interpax_fft.dct_from_cheb`(cheb[, axis])	Get discrete cosine transform from discrete Chebyshev transform.
`interpax_fft.epigraph_and`(points, df_dy, /)	Set intersection of epigraph of function f with the given set of points.
`interpax_fft.fourier_pts`(n[, domain])	Get `n` Fourier points in domain.
`interpax_fft.take_mask`(a, mask, /, *[, ...])	JIT compilable method to return `a[mask][:size]` padded by `fill_value`.