[OT] two question about color space.

Hi,

For a good discussion of the link between colour and spectra I would  
suggest,

http://www.fourmilab.ch/documents/specrend/

which provides an open-source C code to perform the conversion you ask  
for. I asked for some advice on how to wrap a R function around this  
code last week but sadly I didn't get anywhere. Do let me know if you  
succeed. (alternatively, one could port the implementation in pure R  
as the code is not too complicated or computationally demanding).

Hope this helps,

baptiste

Hi there,

I try to plot visible light spectrum (380nm~780nm) with color
corresponding to the specific wavelength. However, I don't find a
function that could do this.

Another question, it's possible to plot a color space chromaticity
diagram like this:
http://upload.wikimedia.org/wikipedia/commons/thumb/0/02/CIExy1931.svg/300px-CIExy1931.svg.png

Thanks in advance!

Jinsong

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Baptiste Augui?

School of Physics
University of Exeter
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http://newton.ex.ac.uk/research/emag