Just really getting started on this, it was suggested on the USENET discussion group comp.graphics.apps.gnuplot that I could plot these into other plots in gnuplot, gnuplot can do multiplots too, so I am experimenting with both, see my HOWTO for the diagrams with gnuplot ...

A chromatictiy diagram is a two dimensional color gamut at a specific level of light. These calculations are at 100% light.

Have to credit Alex van der Spek, zdoor@xs4all.nl , for linking me to these applications.

I used Ubuntu OS for this HOWTO.

Install netpbm from the netpbm site

./configure

make (make --keep-going if neccesary)

make package (make package --keep-going if neccesary)

./installnetpbm

Open a gnome terminal, at the command prompt type the commands proceeding each plot

ppmcie > c_ppmcie.ppm

Open an image editor like get or use a netpbm convertor to get a png file from the ppm file for the web.

ppmcie -upvp > c_ppmcie.ppm

Open an image editor like gimp. or use a netpbm convertor to get a png file from the ppm file for the web.