Linearly interpolates N points between existing points.
INTERPOLATE(series, n)
series |
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A series or table, the data to linearly interpolate. |
n |
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An integer. The interpolation factor. |
A series or table, the linearly interpolated result.
W1: {1, 2, 3}
W2: interpolate(W1, 2)
W2 contains the series {1, 1.5, 2, 2.5, 3}
interp(W1, 5)
increases the size of the series from Window 1 by a factor of 5 and places the result in the current Window. This new series is created by inserting five points between each point of W1 by linear interpolation.
interp(extract(W2, 10, length(W2)-10), 4)
increases the size of the series from Window 2 by a factor of 4, starting from the 10th point of the series, and places the result in the current Window.
INTERPOLATE automatically adjusts the sample rate (1/DELTAX) of the resulting series.
INTERPOLATE can be abbreviated INTERP.
See SPLINE for cubic spline interpolation.
See RESAMPLE to resample a series to an arbitrary rate.
See XYINTERP to linearly interpolate XY data (a series with arbitrary X values) into an interval series (constant deltax).
See XYLOOKUP to find a Y value from an arbitrary X value with possible interpolation.
See OUTLIER to replace outlier values with a linear interpolation of the surrounding values.