smoothing

Open Table or Figure or Fit Plot with initial data and select `Processing → Smooth`

menu item. The opened processing dialog shows parameters, initial curves (semi-transparent) and smoothed preview.

`Periodic`

checkbox applies on calculation of first and last *p/2* points. When it is set MagicPlot will take missing values from the opposite end (as if the signal is periodic) to calculate first and last *p/2* points.

Two algorithms are available: Central Moving Average and Savitzky-Golay method.

Each value *A _{k}* is replaced with

.

If `Periodic`

checkbox is not set the first and last *p/2* points are calculated with the same symmetrical formula but with less summands.

A Savitzky–Golay filter essentially performs a local polynomial regression on a series of equally spaced data points. Each data point value is replaced with local polynomial value at this point.

If `Periodic`

checkbox is not set, MagicPlot will repeat the values of the first and last points to calculate a polynomial for the first and last *p/2* points.

smoothing.txt · Last modified: Sun Nov 8 12:21:24 2015 (external edit)

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