Difference between revisions of "Geopsy: Subtract Value"
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'''Subtract Value''', reached from the [[Geopsy: Waveform Menu|Waveform menu]], removes an offset value for the signals in the active [[Geopsy: Signal Viewer|signal viewer]]. | '''Subtract Value''', reached from the [[Geopsy: Waveform Menu|Waveform menu]], removes an offset value for the signals in the active [[Geopsy: Signal Viewer|signal viewer]]. | ||
| − | By clicking on Subtract Value, a | + | By clicking on Subtract Value, a dialog box appears with the following option: |
*''Mean Value'' removes the arithmetic average of the amplitude signal calculated over the whole signal duration. | *''Mean Value'' removes the arithmetic average of the amplitude signal calculated over the whole signal duration. | ||
*''Value'' allows to specify the value to be subtracted from all samples. It might be either positive of negative. | *''Value'' allows to specify the value to be subtracted from all samples. It might be either positive of negative. | ||
| − | Warning: the offset may be hidden by the offset correction in the [[SciFigs: Properties| | + | Warning: the offset may be hidden by the offset correction in the [[SciFigs: Properties|properties]] of the [[Geopsy: Graphic|Graphic viewer]] [[Geopsy: Graphic#/The signal layer|(tab ''Layers'', box ''Values'')]]. By contrast with this appearance option, ''Subtract value'' creates a new [[Geopsy: Temporary Signal|temporary signal]] displayed in the active viewer. |
Note: In [[Geopsy: Tools|Geopsy toolboxes]], the mean is automatically removed for all signals and windows. | Note: In [[Geopsy: Tools|Geopsy toolboxes]], the mean is automatically removed for all signals and windows. | ||
Revision as of 09:07, 12 March 2010
Subtract Value, reached from the Waveform menu, removes an offset value for the signals in the active signal viewer. By clicking on Subtract Value, a dialog box appears with the following option:
- Mean Value removes the arithmetic average of the amplitude signal calculated over the whole signal duration.
- Value allows to specify the value to be subtracted from all samples. It might be either positive of negative.
Warning: the offset may be hidden by the offset correction in the properties of the Graphic viewer (tab Layers, box Values). By contrast with this appearance option, Subtract value creates a new temporary signal displayed in the active viewer.
Note: In Geopsy toolboxes, the mean is automatically removed for all signals and windows.
