[R] selecting points on 3D scatterplots
ligges at statistik.tu-dortmund.de
Tue May 12 22:18:10 CEST 2009
Or with scatterplot3d:
The regular identify() usage with the iris data:
s3d <- scatterplot3d(iris[,1:3], color=as.numeric(iris[,5]))
or for locator: the values you get are the 2D representation of the
current coordinate system and you can use locator directly for putting
text in such as in:
text(locator(1), "The iris data")
If you want to convert back to 3D: This is not possible, because there
is a while line behind that point you are clicking on ....
Duncan Murdoch wrote:
> On 5/12/2009 3:08 PM, Abby Drake wrote:
>> Hello Everyone,
>> I am new to R and need some help.
>> I have a matrix of x,y,z coordinates that I would like to
>> interactively plot in 3D and then using the cursor select points on
>> the plot and have the coordinates sent to a matrix. I am using the rgl
>> package to plot the data at the moment because it allows me to rotate
>> and zoom. I also tried cloud and scatterplot3D.
>> I am looking for a function like 'locator' which is used to select
>> points on 2D scatterplots.
> There's no locator3d, but select3d is somewhat similar.
> You could write a locator3d function using the rgl.setMouseCallbacks,
> rgl.user2window and rgl.window2user functions, if you can figure out how
> to indicate depth with a mouse click. identify3d might be a little easier.
> Duncan Murdoch
> R-help at r-project.org mailing list
> PLEASE do read the posting guide
> and provide commented, minimal, self-contained, reproducible code.
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