MagicPlot Manual

Plotting and nonlinear fitting software

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smoothing [Tue Jun 4 00:39:43 2013]
Alexander
smoothing [Sun Nov 8 12:21:24 2015]
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-====== Smoothing (Pro edition only) ===== 
-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. 
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-{{:​smoothing.png?​nolink|Smoothing dialog}} 
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-===== Parameters ===== 
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-''​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. 
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-===== Algorithms ===== 
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-Two algorithms are available: Central Moving Average and [[wp>​Savitzky–Golay_smoothing_filter|Savitzky-Golay method]]. 
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-==== Central Moving Average ==== 
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-Each value //​A<​sub>​k</​sub>//​ is replaced with //​p//​-points average: 
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-<​m>​A_k = sum{i=k−{p{/​}2}}{k+p{/​}2}{a_i}</​m>​. 
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-If ''​Periodic''​ checkbox is not set the first and last //p/2// points are calculated with the same symmetrical formula but with less summands. 
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-==== Savitzky-Golay Filter ==== 
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-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. 
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-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. 
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-===== See Also ===== 
-  * [[processing]] 
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smoothing.txt · Last modified: Sun Nov 8 12:21:24 2015 (external edit)