Hi,
I am plotting a policy function (result from a dynamic stochastic optimization problem, discretized approximation). The policy function maps from an 2 x 2 x 2 x 3 x B x F state space to a B x F state space (B and F are usually between 4-6, and represent domestic and foreign savings. The other variables are income (Y), inflation (Pi), domestic and foreign interest rates (R and Z)). I actually wrote a plotting function to represent all this, the result is attached -- please have a look at it and help me...
I need advice in the following: I need two sets of colors for B and F which are easy to distinguish (when printed on a color laser printer), represent cardinality (ie have an intuitive mapping to an interval) or at least ordinality.
I have experimented with the following:
Bcolors <- hsv(.6, seq(0.2, 1, length=5), 1) Fcolors <- hsv(seq(.1,0, length=5), seq(0.2, 1, length=5)
this is what you see in the plot. What colors would you use? Do you think that varying both brightness and hue helps to distinguish colors? Should I change saturation, too?
Hmm, Ross Ihaka has given a talk at the DSC2003 conference about constructing sensible colors. Unfortunately, there is no paper available at http://www.ci.tuwien.ac.at/Conferences/DSC-2003/Proceedings/ ...
Some notes and a color package are available at http://www.stat.auckland.ac.nz/~ihaka/color/
Also, you might want to look at the package RColorBrewer available at CRAN. The package is supposed to provide palettes of sensible colors.
Uwe Ligges
PS: If you want to send any attachments: Preferably upload to a web site and just post the link.
Thanks,
Tamas
PS.: The plot is simply gzipped. If you need a zipped version, or the source code, contact me.
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