I just used the following command to get a color map in the blue range
(based on a long-ago post by Ethan Merrit, thanks Ethan!)
set palette rgbformulae 5, 7, 8 negative
How exactly does this work? I read the help and then dug deeper by `show
palette rgbformulae`. I see there are those 36 functional forms defined.
How are these selected? And why do these work? Just seems like "magic" to
me that the (5,7,8) selection above ( I think: x^3 , sqrt(x) , sqrt(sqrt
(x)) ) leads to a "blue map".
Can someone explain, or perhaps point me to other sources? Just my
curiosity how this works.
--
Rahul
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