[R] Display common color scale on multiple scatter3D plots

[Jim Lemon]

Hi Luigi,
Upon careful reading of the help page, you can do it with scatter3D:

scatter3D(X, Y, Z, col.var = Z, pch = 16, cex = 2,clim=c(0.5,3))
scatter3D(X, Y, K, col.var = K, pch = 16, cex = 2,clim=c(0.5,3))

Jim

On Thu, Mar 14, 2019 at 9:32 PM Luigi Marongiu <marongiu.luigi using gmail.com> wrote:
>
> Dear all,
> I am trying to display multivariate data using the library plot3D. I
> have 3 variables that go on the axis and a fourth that I would like to
> display as a color shade. However, the scale differs between plots
> because the data I am using varies.
> Would be possible to maintain a single scale so that the different
> points will have the same shade on different plots? This would be like
> giving the same axis scale on different plots.
>
> For example, I got the following:
> >>>>
> set.seed(50)
> x = runif(10, 6, 18)
> y = runif(10,  5,  7)
> z = runif(10, 0.7, 3.14)
> k = runif(10, 0.5, 1.2)
> w = runif(10, min(z, k), max(z,k))
> df = my.data <- data.frame(x, y, z, k, w)
>
> library("plot3D")
> X = df$x
> Y = df$y
> Z = df$z
> K = df$k
> W = df$w
> scatter3D(X, Y, Z, col.var = Z, pch = 16, cex = 2)
> scatter3D(X, Y, K, col.var = K, pch = 16, cex = 2)
> <<<
>
> In these plots the scale varies (0.6-0.9 in the first plot, 1.5-2.5 in
> the second); I tried by creating a common scale with the variable W
> which ranges from the min and max of the fourth levels represented by
> the variables Z and K, but the result is the same:
> scatter3D(X, Y, Z, col.var = W, pch = 16, cex = 2)
> scatter3D(X, Y, K, col.var = W, pch = 16, cex = 2)
>
> Essentially, I would like the variables Z and K to be shaded according
> to a common scale so that I could evaluate the shades of the two plots
> directly.
> Would that be possible?
> Thank you.
>
> --
> Best regards,
> Luigi
>
> ______________________________________________
> R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.