Origin Ver. and Service Release (Select Help-->About Origin): 9.0 Operating System:Win 7 I use the Virtual Matrix to creat the contour figures, however, although I delete the Graph generated by Virtual Matrix, the Virtual Matrix seems to be existed still. Because when I am creating a new graph, it warns me that the name of Virtual Matrix is existed. How can I delete the Virtual Matrix?
The virtual matrix created by plotting your original graph refers to the worksheet containing the data, and not the graph itself. You should be able to either enter a new Z Title for your new graph, or delete the worksheet which had contained the virtual matrix.