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 pop-up window appears with the following option: | By clicking on Subtract Value, a pop-up window appears with the following option: | ||
| − | *"Mean Value" removes the | + | *"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. | + | *"Value" allows to specify the value to be subtracted from all samples. It might either positive of negative. |
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)]]. On the contrary to this appearance option, "Subtract value" modifies the [[Geopsy: Temporary Signal|temporary signal]]. | 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)]]. On the contrary to this appearance option, "Subtract value" modifies the [[Geopsy: Temporary Signal|temporary signal]]. | ||
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 07:40, 10 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 pop-up window 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 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). On the contrary to this appearance option, "Subtract value" modifies the temporary signal.
Note: In Geopsy toolboxes, the mean is automatically removed for all signals and windows.
