fracshift This function shifts the series x supplied as input argument by a number of samples d. y = fracshift(x, d) y = fracshift(x, d, h) [y, h] = fracshift(...) x: d: h: This is an Octave function. This function shifts the series x supplied as input argument by a number of samples d. The third parameter is the interpolator, which is designed with a Kaiser-windowed sinecard by default, if not supplied.