contour and color-changing lines?

[Emilie Vanvyve <vanvyve@xxxxxxxxxxxxxx>]

Hello Ferreters!

I'm wondering whether it is possible or not with Ferret to plot a temperature field using CONTOUR and where the line color is changing according to the temperature value. A bit like a FILL with a palette, but without filling, or a bit like associating a color palette to the lines that CONTOUR draws.

All I've found in the documentation is:

! mix: three line colors
contour/level="(1,30,1,-1) PEN(5,10,1,2) PEN(11,20,1,3) PEN(21,30,1,4)" my_var

(from the custom_contour_demo.jnl example)

But it's then just 3 colors and the change is not progressive. I'm imagining something like:

CONTOUR/pal="default.spk"/level=(-20,20,1) my_temperature


If anyone knows how to do that, I'll be glad to know it also!

Emilie V.

____________________________________________________________

Emilie VANVYVE

Physicist, PhD student

Université catholique de Louvain (UCL)
Institut d'astronomie et de géophysique G. Lemaître (ASTR)
Chemin du Cyclotron, 2
1348 Louvain-la-Neuve (Belgium)
Phone : +32-(0)10-473300 // Fax : +32-(0)10-474722
E-mail : vanvyve@astr.ucl.ac.be // Web : www.astr.ucl.ac.be