R help - Dec 2012 - Focus on a sub-panel of a splom with trellis.focs() -- return coordinate of sub-panel, or names of variables therein

Hi,
I'd like to be able to generate a splom plot in R and then use my mouse to
click on one of the sub-panels (panel.pairs, specifically) and have R return
either the coordinates of that sub-panel, or even better, the names of the
corresponding variables plotted in that sub-panel.

Here's an example to work with:
> library(lattice)
> splom(~iris[1:4], groups = Species, data = iris,
+       panel = panel.superpose,
+       key = list(title = "Three Varieties of Iris",
+                  columns = 3, 
+                  points = list(pch = super.sym$pch[1:3],
+                                col = super.sym$col[1:3]),
+                  text = list(c("Setosa", "Versicolor",
"Virginica"))))

This is what I've been able to come up with so far, but I know it's not
what I need. I'd like to be able to select an entire sub-panel
> trellis.focus()
> panel.link.splom() #click on a point in the plot, then hit 'esc'
[1]  80 111
> trellis.unfocus() #to end trellis.focus
Thanks for your help,
Eric


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You could try

require(grid)
trellis.focus()
names(iris)[round(unlist(grid.locator()))]
trellis.unfocus()

cheers

On Tue, Dec 11, 2012 at 11:59 AM, Eric Stone <eric.stone@temple.edu>
wrote:
> Hi,
> I'd like to be able to generate a splom plot in R and then use my mouse
to
> click on one of the sub-panels (panel.pairs, specifically) and have R
> return either the coordinates of that sub-panel, or even better, the names
> of the corresponding variables plotted in that sub-panel.
>
> Here's an example to work with:
>
> > library(lattice)
> > splom(~iris[1:4], groups = Species, data = iris,
> +       panel = panel.superpose,
> +       key = list(title = "Three Varieties of Iris",
> +                  columns = 3,
> +                  points = list(pch = super.sym$pch[1:3],
> +                                col = super.sym$col[1:3]),
> +                  text = list(c("Setosa",
"Versicolor", "Virginica"))))
>
> This is what I've been able to come up with so far, but I know it's
not
> what I need. I'd like to be able to select an entire sub-panel
>
> > trellis.focus()
> > panel.link.splom() #click on a point in the plot, then hit
'esc'
>
> [1]  80 111
>
> > trellis.unfocus() #to end trellis.focus
>
> Thanks for your help,
> Eric
>
>
>         [[alternative HTML version deleted]]
>
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
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>
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