[Plplot-general] contour plotting problem

[Joachim G. <joa...@ip...>]

Hello,
after some days of debugging (frustration included), I think
that the contour plotting routine used for plcon2 in the fortran
interface has a bug in it. The attached example shows the problem
and is taken from the expample x09f.f of version 5.3.0 and
is the following:
when you plot a function z(r) on the space x(r,theta),y(r,theta),
then it depends on the storage of the grid values for plcon2
whether you see the contour lines or not. Specifically,
x(r,theta) is stored in xg(i,j) (y and z the same way); if
i corresponds to r, then you will get nice nested contours,
if i corresponds to theta (thus j corresponds to r) then
no contours are seen.
If there is a dependence of z on r and theta, you will not
notice this asymmetry in the coordinates.
Has anyone an idea how to fix it, so that it does not
depend on the order of the coordinates that you might or
might not see contour lines?
By the way, I love plplot!!! Really great!
Joachim

-- 
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Joachim Geiger                                  @\\
Institute for Plasma Physics, Euratom Association\\\
Department E3                                     \\\__
Wendelsteinstr. 1                                (  \\ \
D-17491 Greifswald, Germany                       \_ \\(_
Tel.: 03834/88-2327                                 ) \\ \
e-mail: joa...@ip...                   \  -  |
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