Last Update: 1/8/2019
A contour triangulation algorithm that plots raw X and Y data was implemented for Origin 2016. Previous versions performed some normalization of X and Y data before plotting. The change will be most noticeable if there are large scale range differences between your X and Y values. Such contour and surface plots of XYZ worksheet data may look very different in 2016 (or higher versions) as compared to previous versions.
To normalize data before plotting, click on your graph to activate the graph window, then choose Format: Page. In Plot Details, click the Miscellaneous tab and enable Normalize Data for XYZ Contour/Surface Plot.
Keywords:XYZ, contour, surface, triangulation, normalize, 3D