On Apr 1, 2011, at 6:21 PM, Pam Allen wrote:
I have a question about wireframe 3-D plots and how to apply
colors. I have
a large dataset of river flow (m^3/s) over time, and I have coded
these
flows based on their height. I would like to produce a wireframe
plot that
colors the graph based on the flow code, i.e. I would like high
flows to be
red, medium to be green and low flows to be blue. Here is some
sample data
with the basic wireframe plot:
flow.dat=cbind.data.frame(flow=sin(2*pi/53*c(1:3000))
+1,day=as.numeric(format(as.Date(c(1:3000)),
format="%j")), year=as.numeric(format(as.Date(c(1:3000)),
format="%Y")),grp=c(rep(c("1.high","2.med","3.low"),1000)))
It does not look to me that high flows are properly grouped with `grp`.
wireframe(flow~day*year, data=flow.dat, shade=T)
wireframe(flow~day*year, data=flow.dat, drape=TRUE,
col.regions=c("#FF3030","#551A8B","#43CD80"),
at=c(0,.6,1.3,1.8))
Because of the coding at the corner and the long thin polygons you
have specified with your day*year splits you get slanting colors.
Is there any way to specify what colours are passed to the plot? I.e.
wireframe(flow~day*year, data=flow.dat, shade=T, groups=grp,
col.group=c("#FF3030","#551A8B","#43CD80"))
I would also be happy if I could do this with a cloud plot, but I
can't get
the colors to plot correctly.
cloud(flow~day*year, data=flow.dat, shade=T, groups=grp,
col.group=c("#FF3030","#43CD80","#1E90FF"), pch=20)
Any help is much appreciated! Thank you.
-Pam Allen
allen_...@hotmail.com
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