> How would one go about plotting a curve on top of a contour plot?

> Say we have a contour plot on an x-t diagram of say, pressure gradient
> generated by a script similar to what is seen in the previous thread:
> http://groups.google.com/group/amrita-ebook/browse_thread/thread/77b8...

> And we also have a file listing the x-t coordinates of a curve (say,
> the x-t coordinates of a particle path or a C+ characteristic). What
> is the best way to plot the curve on top of the contour plot? This can
> be done by dumping the results extracted by AMRITA  simulation into a
> program like MATLAB or Mathematica and having those programs do the
> plotting, but it may be better to do everything on the fly within
> AMRITA

> Right now I am thinking of plotting the curve using the "line" command
> to connect the points (connecting the first point in the x-t file to
> the second point, taking the second point and connecting it to the
> third and so on) and overlaying what I get onto the contour plot (of
> say pressure gradient). Would this be the right approach to take?

> On a related note, is there a way to draw the lines differently, for
> example making some lines slightly thicker than other lines, or adding
> colour to the lines? Say we wanted to plot many C+ and C-
> characteristics together. If we plotted a lot of those lines together,
> the result could be a jumbled mess, and we want to colour code it so
> that the C+ is red and the C- is blue. Is there a way to do something
> like this within AMRITA?

> Thanks,
> Carlos