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Download Function Reference Manual - DSP Development Corporation
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Format: FZINTERP(s, n) s - An input series or array. n - A real, the interpolation factor, N > 1.0. Defaults to 2.0. Returns: A series or array. Example: W1: gsin(64, 1/64, 3) W2: fzinterp(W1, 4) W1 contains 64 samples of a 3 Hz sine wave sampled at 64 Hz. W2 produces a 253 point interpolated 3 Hz sine wave with a sample rate of 64 * 4 = 256 Hz. W3: fzinterp(W1, 3.5) produces a 221 point interpolated 3 Hz sinewave with a sample rate of 64 * 3.5 = 224 Hz. Remarks: FZINTERP is identical to ZINTERP except that the interpolation factor (i.e. the multiple of the original sampling rate) is specified instead of the new rate. Although the interpolation factor N is NOT required to be an integer, for an output length L, the relation: N = L / length(s) must hold, so the actual interpolation factor might differ from N. See ZINTERP for algorithm details. See Also: FSINTERP INTERPOLATE POLYFIT SPLINE ZINTERP GAMM Purpose: Executes the gamma function; a generalization of factorial for the domain of real numbers. 289
