From: Ben Bolker <bolker_at_ufl.edu>

Date: Wed 26 Jul 2006 - 07:11:22 EST

z[is.na(z)] <- 1

labeltop2d <- trans3dfun(labeltop3d)

labelang <- 180/pi*atan2(labeltop2d$y-labelbot2d$y,labeltop2d$x-labelbot2d$x) par(xpd=NA,srt=labelang) ## disable clipping and set string rotation text(labelmid2d[1]$x,labelmid2d$y,"z label")

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Wed Jul 26 07:15:40 2006

Date: Wed 26 Jul 2006 - 07:11:22 EST

Paul Murrell <p.murrell <at> auckland.ac.nz> writes:

*>
**> Hi
**>
*

> Kilian Plank wrote:

*> > Good morning,
**> >
**> > in a 3D plot based on persp() the axis title (of dimension z) overlaps with
**> > the axis labels.
**> > How can the distance (between axis labels and axis title) be increased?
**>
*

*> Paul
*

Another way to do it: get the perspective matrix back from persp() and use trans3d() to redo essentially the same calculations that persp() does to decide where to put the label:

x <- seq(-10, 10, length= 30) y <- x f <- function(x,y) { r <- sqrt(x^2+y^2); 10 * sin(r)/r } z <- outer(x, y, f)

z[is.na(z)] <- 1

par(mfrow=c(2, 2))

persp(x, y, z, theta = 30, phi = 30, expand = 0.5,

col = "lightblue", ticktype="detailed")

persp(x, y, z, theta = 30, phi = 30, expand = 0.5,

col = "lightblue", ticktype="detailed", zlab="\n\n\n\nz") p1 <- persp(x, y, z, theta = 30, phi = 30, expand = 0.5, col = "lightblue", ticktype="detailed",zlab="")

ranges <- t(sapply(list(x,y,z),range))

means <- rowMeans(ranges)

## label offset distance, as a fraction of the plot width labelspace <- 0.12 ## tweak this until you like the result

xpos <- min(x)-(diff(range(x)))*labelspace ypos <- min(y)-(diff(range(y)))*labelspace labelbot3d <- c(xpos,ypos,min(z)) labeltop3d <- c(xpos,ypos,max(z)) labelmid3d <- c(xpos,ypos,mean(range(z))) trans3dfun <- function(v) { trans3d(v[1],v[2],v[3],p1) } labelbot2d <- trans3dfun(labelbot3d) labelmid2d <- trans3dfun(labelmid3d)

labeltop2d <- trans3dfun(labeltop3d)

labelang <- 180/pi*atan2(labeltop2d$y-labelbot2d$y,labeltop2d$x-labelbot2d$x) par(xpd=NA,srt=labelang) ## disable clipping and set string rotation text(labelmid2d[1]$x,labelmid2d$y,"z label")

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Wed Jul 26 07:15:40 2006

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