[R] Adding points to a wireframe: 'x and units must have length >0' error
Dennis Murphy
djmuser at gmail.com
Mon Oct 24 23:25:57 CEST 2011
Hi David:
When I try your code, I get the wireframe with the x, y, z axes sans
bounding cube and points, along with the error message
Error using packet 1
object 'pts' not found
> sessionInfo()
R version 2.13.1 (2011-07-08)
Platform: x86_64-pc-mingw32/x64 (64-bit)
locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] sos_1.3-1 brew_1.0-6 lattice_0.19-33
loaded via a namespace (and not attached):
[1] grid_2.13.1 tools_2.13.1
Dennis
On Mon, Oct 24, 2011 at 1:45 PM, David Winsemius <dwinsemius at comcast.net> wrote:
>
> On Oct 24, 2011, at 4:12 PM, Megan Bartlett wrote:
>
>> Hi David,
>>
>> Thanks for the suggestion - I changed pts1 to pts, but I still got
>> the same error as before. Do you know what else I'm doing wrong?
>
> I do not. The code that works for me is:
>
> 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) * (pts$x - xlim[1]) /
> diff(xlim)
> yy <- ylim.scaled[1] + diff(ylim.scaled) * (pts$y - ylim[1]) /
> diff(ylim)
> zz <- zlim.scaled[1] + diff(zlim.scaled) * (pts$z - zlim[1]) /
> diff(zlim)
> panel.3dscatter(x = xx,
> y = yy,
> z = zz,
> xlim = xlim,
> ylim = ylim,
> zlim = zlim,
> xlim.scaled = xlim.scaled,
> ylim.scaled = ylim.scaled,
> zlim.scaled = zlim.scaled,
> ...)
> })
>
> --
> David.
>>
>> Thanks,
>>
>> Megan
>>
>> PS. New code is:
>>
>> wireframe(z ~ y*x, gridd, drape = TRUE, colorkey= TRUE,
>> scales = list(arrows = FALSE),
>> pts = pts1,
>> panel.3d.wireframe =
>> function(x, y, z,xlim, ylim, zlim, xlim.scaled,
>> ylim.scaled, zlim.scaled, pts, ...)
>>
>> {
>> panel.3dwire(x = x, y = y, z = z,
>> xlim = c(-4, 0),
>> ylim = c(0, 40),
>> zlim = c(-160, 0),
>> xlim.scaled = c(-0.5, 0.5),
>> ylim.scaled = c(-0.5, 0.5),
>> zlim.scaled = c(-0.5, 0.5),
>> ...)
>> xx <- xlim.scaled[1] + diff(xlim.scaled) * (pts$x -
>> xlim[1]) / diff(xlim)
>> yy <- ylim.scaled[1] + diff(ylim.scaled) * (pts$y -
>> ylim[1]) / diff(ylim)
>> zz <- zlim.scaled[1] + diff(zlim.scaled) * (pts$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,
>> ...)
>> })
>>
>>
>> On Mon, Oct 24, 2011 at 12:04 PM, David Winsemius <dwinsemius at comcast.net
>> > wrote:
>>
>> On Oct 24, 2011, at 1:23 PM, Megan Bartlett wrote:
>>
>> 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,
>>
>> You assigned 'pts1' to 'pts', so you should have used 'pts' above:
>>
>>
>> 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
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help at r-project.org 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.
>>
>> David Winsemius, MD
>> West Hartford, CT
>>
>>
>
> David Winsemius, MD
> West Hartford, CT
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org 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.
>
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