Thank Alec

I want the first case you described, say,

3D coordinate variables for x, y, and m and plot only curves for fixed values of m, equal 1, 5, and 10

 Could you tell me  how to implement this?

Thanks again!

Thank Alec

I want the first case you described, say,

3D coordinate variables for x, y, and m and plot only curves for fixed values of m, equal 1, 5, and 10

 Could you tell me  how to implement this?

Thanks again!