Hi,

I'm trying to follow the suggestions given by Deepayan Sarkar in this
message:

http://tolstoy.newcastle.edu.au/R/help/05/11/16135.html

to plot 3-D points on a wireframe plot. The problem is that I keep getting a
partly formed plot- with the colored lattice visible but no axis labels or
additional points- with the error message "error using packet 1, 'x' and
'units' must have length >0".  Does anyone know what I'm doing wrong? The
code I've been using is:

# generate some fake data
data.frame(x = seq(-4, 0, 0.5), y = seq(0, 40, 5))-> df
expand.grid(x = df$x, y = df$y) -> gridd
(gridd$y* gridd$x) -> gridd$z

data.frame(x = runif(10, -4, 0), y = runif(10, 0, 40))-> pts1
pts1$z <- pts1$x*pts1$y

# plot

wireframe(z ~ y*x, gridd, drape = TRUE, colorkey= TRUE,
          scales = list(arrows = FALSE),
          pts = pts1,
          panel.3d.wireframe =
          function(x, y, z,xlim, ylim, zlim, xlim.scaled, ylim.scaled,
zlim.scaled, pts1, ...)

                    {
              panel.3dwire(x = x, y = y, z = z,
                           xlim = c(-4, 0),
                           ylim = c(0, 40),
                           zlim = c(-160, 0),
                           xlim.scaled = c(-0.5, 0.5),
                           ylim.scaled = c(-0.5, 0.5),
                           zlim.scaled = c(-0.5, 0.5),
                           ...)
        xx <- xlim.scaled[1] + diff(xlim.scaled) * (pts1$x - xlim[1]) /
diff(xlim)
        yy <- ylim.scaled[1] + diff(ylim.scaled) * (pts1$y - ylim[1]) /
diff(ylim)
        zz <- zlim.scaled[1] + diff(zlim.scaled) * (pts1$z - zlim[1]) /
diff(zlim)
              panel.3dscatter(x = xx,
                              y = yy,
                              z = zz,
                              xlim = xlim,
                              ylim = ylim,
                              zlim = zlim,
                              xlim.scaled = xlim.scaled,
                              ylim.scaled = ylim.scaled,
                              zlim.scaled = zlim.scaled,
                              ...)
          })

Thanks so much!

-Megan Bartlett

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