Manually defining the colours of a wireframe
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I am plotting some surfaces in R using the lattice package. I can't find a way to choose the colours of the surface. Here is an example:
Here is an example of how i plot each:
theseCol=heat.colors(150) mm=paste("WB numbers where present\n(",nstoch," sims)",sep="") WBnumbers=wbPrev_series rownames(WBnumbers)=KList colnames(WBnumbers)=iMwbList wireframe(WBnumbers, zlim=c(0,max(wbPrev_series,na.rm=TRUE)), colorkey=FALSE, col.regions=theseCol, scales = list(arrows = FALSE), drape = TRUE, main=mm, zlab="", xlab="K", ylab="iMwb")
I would like for the first surface to be as it is, but for the others to be coloured not by their z levels but by the 1st surface's z levels. I tried multiple things but wireframe always accepts the colours i give as the possible ranges for the current variable.
Anyway this could be done? ThanksАвтор: lourencoj Источник Размещён: 23.05.2013 03:37
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Here is the answer Dave W. posted some years back on the R-help mailing list. You probably can google up the entire thread.
From: David Winsemius
Following the advice in help(wirefrane) you need to look at the
levelplot section for advice re: a proper specification to colorkey
and follow the appropriate links in the help pages. Whether your data
is a proper input to wireframe cannot be determined from the included
information, although I suppose your reported success suggests it is.
This is an untested (since there was nothing to test) wild-assed guess
after reading the material I pointed to:
wireframe(data.m,aspect = c(0.3), shade=TRUE, screen = list(z = 0, x = -45), light.source = c(0,0,10), distance = 0.2,zlab="Freq",xlab="base",ylab="Fragment", col=level.colors(x, at = do.breaks(range(data.m), 30), col.regions = colorRampPalette(c("red", "white", "blue")(30)) )
EDIT: Per Josh's request, I played around a bit. The following will apply color shading (drape):
wireframe(dmat,drape=TRUE,col='black',col.regions = colorRampPalette(c("red", "white", "blue"))(30) )
Which sets the "drape" colors but not the gridlines themselves.
It's a darn shame that
wireframe doesn't respect
par(new=TRUE), because if it did we could slice the data matrix into z-ranges and overplot one color at a time.
I will have to check my "archive" of old experiments w/ R graphics when I get home, but I think I ended up using the
scatterplot3d package to get data-dependent grid colors.