Re: [Gnuplot-info] how to make contour plot in 2d with other 2d lines

[<br...@ph...>]

Michael Chen wrote:
> Hi, it is pretty common to see such a graph in nonlinear optimization
> book: on xy plane, contour of objective function, and lines or curves
> of constraints.
> 
> I tried to make contour using splot, but then I can not add 2d plots
> onto it. Any suggestions?

Two:

1) Output the contours to the 'table' driver (--> help table), and use 
them in a 'plot' instead of an 'splot'

2) 'set parametric; set view map', and you can draw 2D curves even in 
splots.