Engauge Digitizer - Fixing The Axis Points

If you are seeing unexpected values for the coordinates produced by Engauge Digitizer, then there probably is a problem with the axis points. Axis point problems include:

• An axis point was placed at the wrong location on the graph
• The X or Y coordinate of an axis point was entered incorrectly
• In a polar plot, the origin has a nonzero radius (so the default value of zero in the Coordinates Dialog does not apply)

The Axes Checker usually reveals problems with axis points - a shape that is not a rectangle (in cartesian coordinates) or annular disk (in polar coordinates) is usually a symptom.

This trick is also helpful if your axis points are fine, but the problem lies in the original image.