
2.32. Coherence Analysis
Coherence is a measure of the degree of relationship, as a function of frequency, between two time
series.
Parameters
Parameter Description
Reference Specifies a reference variable.
Max. Freq. Frequency maximum (Hz).
Number of Fr. Values Number of frequency values.
Window Overlap Percent of window overlaps when calculating FFTs.
Show Freq. From An option to show a subset of frequencies. Specifies minimum frequency
to be displayed.
Show Freq. To An option to show a subset of frequencies. Specifies maximum frequency
to be displayed.
Calculate Specifies whether coherence values or coherence phases are calculated.
Confidence Level (%) Confidence level (percent) for the coherence values. See Confidence
Level Calculation below for details.
Draw confidence level An option to draw the confidence level. Conficence level is not drawn if
coherence phases are specified in Calculate parameter.
Conf. line style Line style for drawing confidence level.
Select Data If Select Data is From Time Range, only the data from the specified (by
Select Data From and Select Data To parameters) time range will be used
in analysis. See also Data Selection Options.
Select Data From Start of the time range in seconds.
Select Data To End of the time range in seconds.
Interval filter Specifies the interval filter that will be used to preselect data before
analysis. See also Data Selection Options.
Add to Results / Bin left An option to add an additional vector (containing a left edge of each
frequency bin) to the matrix of numerical results.
Add to Results / Bin
middle
An option to add an additional vector (containing a center of each
frequency bin) to the matrix of numerical results.
Add to Results / Bin
right
An option to add an additional vector (containing a right edge of each
frequency bin) to the matrix of numerical results.
Send to Matlab An option to send the matrix of numerical results to Matlab. See also
Matlab Options.
Matrix Name Specifies the name of the results matrix in Matlab workspace.
Matlab command Specifies a Matlab command that is executed after the numerical results
are sent to Matlab.
Send to Excel An option to send numerical results or summary of numerical results to
Excel. See also Excel Options.
Sheet Name The name of the worksheet in Excel where to copy the numerical results.
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