Coordinate Systems
xyscan uses 2 coordinate systems:
- Local Coordinates
- These are essentially the screen coordinated of the window in which the plot is displayed is performed. The units are pixel. The upper left corner of the plot defines is defined by the origin (0,0) of the plot. x coordinate increases to the right, y increases downwards. They are displayed on the top of the Coordinate Display window once a plot is loaded.
- Plot Coordinates
- These are
the coordinate of the data points you want to scan. In order
to transform local coordinates into plot coordinates, xyscan needs markers to
be set along the axis. The user has to provide the position
of the markers in plot coordinates.