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== remove mean value ==

'''command''': DEMEAN <trc-list> [<lo-bound> <hi-bound>]

Removes mean value from all traces given by <trc-list>. If the parameters <lo-bound>, <hi-bound> are not specified, the mean value is determined inside the current display window. You can enter a "*" as second parameter (<lo-bound>), then the time window is selected by graphic cursor.

=== parameters ===

 * <trc-list> ''parameter type: trace list''[[BR]]
   List of traces to remove mean value.

 * <lo-bound>, <hi-bound> ''parameter type: real''[[BR]]
   Time window in sec. (rel. to time axis) for determining mean value. If omitted the current display window is used. If an astrisk ("*") is entered as <lo-bound> the time window can be selected by graphic cursor.

=== example ===

 `demean 1 10. 20.`::
 removes mean value of time window from 10 sec to 20 sec from all samples of first trace

 `demean all`::
 removes mean value of all traces on display. The mean values are determined inside the current display window.

 `demean 1-3 *`::
 removes mean value from first three traces on display. The time window can be selected by graphic cursor.