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5.5.8.30. FilterContinuousVariable Function

FilterContinuousVariable Function

Filters the specified continuous variable using the specified frequency filter.

Syntax

FilterContinuousVariable(doc, contVar, filteredVarName, filterType, filterOrder, freq1, freq2)

Parameters

Parameter Type Description

doc documentReference Reference to the document.

contVar variableReference Reference to the variable.

filteredVarName string The name of the filtered variable.

filterType string The type of the filter. Should be "Lowpass",

"Highpass", "Bandpass", "Bandstop" or "Notch".

filterOrder double The number specifying the filter order. Should be

between 3 and 11 inclusive.

freq1 double Filter frequency parameter (in Hz). See comments

below.

freq2 double Filter frequency parameter (in Hz). See comments

below.

Returns

None

Comments

If the filter type is Lowpass or Highpass, freq1 is a cutoff frequency and freq2 is not used.

If the filter type is Bandpass or Bandstop, freq1 is a minimum of the frequency range and freq2 is a

maximum of the frequency range.

If the filter type is Notch, freq1 is the center of Notch filter and freq2 is the width of the Notch filter.

Usage

NexScript

The following sample script applies Bandpass filter to the variable ContChannel01. The result of

filtering will be saved in continuous variable Cont1BandFiltered. The filter order is 5 and the frequency

band is from 1000 Hz to 2000 Hz:

doc = GetActiveDocument()

var = GetVarByName(doc, "ContChannel01")

FilterContinuousVariable(doc, var, "Cont1BandFiltered", "Bandpass", 5, 1000, 2000)

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Multichannel-systems NeuroExplorer Manual de usuario Pagina 260