I see. I have been thinking of superimposing two plots with
par(new=TRUE), but how could I remove all the graphic parameters
(axes, background etc) keeping only the actual points in lattice? (if
possible).
Tx
On Thu, Feb 28, 2019 at 3:53 PM Duncan Murdoch <murdoch.dun...@gmail.com> wrote:
>
> On 28/02/2019 5:39 a.m., Luigi Marongiu wrote:
> > Dear all,
> > is it possible to add points to a lattice cloud plot (3D scatter)? I
> > can plot the main data, but what if I wanted to add another point. In
> > R there is the high level plotting function plot(), then the low level
> > points() or lines() etc. What is the equivalent for lattice?
>
> I don't know for sure, but I don't think you can do that in lattice.
> The scatterplot3d::scatterplot3d function returns enough information to
> do this, but I don't think lattice::cloud does. But even
> scatterplot3d::scatterplot3d won't necessarily get it right if points
> hide others that are behind them. It uses the "painter's algorithm",
> and that needs everything to be drawn in just the right order, which you
> probably won't get if you draw things in several calls.
>
> You can draw things in arbitrary order using rgl::plot3d or related
> functions, but you'll need to do more work yourself to get an array of
> plots like lattice gives.
>
> Duncan Murdoch
>
>
> >
> > Thank you
> >
> >
> >>>>
> >
> > df = data.frame(Name = c("A", "B", "C", "D", "E"),
> > x_axis = c(-0.591, 0.384, -0.384, -0.032, 0.754),
> > y_axis = c(-1.302, 1.652, -1.652, 0.326, 0.652),
> > z_axis = c(1.33, 1.33, 2.213, 0.032, -0.754),
> > stringsAsFactors = FALSE)
> >
> > cloud(z_axis ~ x_axis * y_axis, data = df,
> > xlab = "X", ylab = "Y", zlab = "Z",
> > pch = 16, col = "red", type = "b", cex = 1.5,
> > ltext(x=df$x_axis, y=df$y_axis, z=df$z_axis,
> > labels=df$Names, pos=1, offset=1, cex=0.8)
> > )
> >
> > df2 = data.frame(Name = "F",
> > x_axis = 0.891,
> > y_axis = 2.302
> > z_axis = -1.83,
> > stringsAsFactors = FALSE)
> >
>
--
Best regards,
Luigi
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