Geopsy: Subtract Value

Subtract Value pop-up window

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 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). 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.