The zapping function allows the
user to identify a region of data points in a 2D
data object or 3D data object
and replace them with a straight line connecting the starting data point
with the ending data point at the extremes. In case of 3D data, the specified
region is replaced by a plain surface.
While it can be used for many things, this data editing tool is especially
useful for wiping out interferences and spikes, before e.g. searching
data on a library.