CODEWITHSUNDEEP
r3dplotvisualizationdata-visualization
Ali
Ali

Reputation: 58501

Plotting surfaces with contour map in 3D over triangles

The example code here for rgl does almost what I want. However my (x,y) are not in a rectangle but in a triangle that is half of the rectangle (x=0..1, y=0..1 and z is missing if x+y>1).

My input dataset is in the following format:
x1 x2 x3 x4 x5 x6 z

and I would like to visualize (x4, x5, z) and (x2, x3, x6), etc. Any help is appreciated how to do this in R, I am beginner.

Can export the final plot into PDF, EPS or SVG?

UPDATE: OK, I see I can export to EPS.

UPDATE 2: Thanks to Carl I almost got what I want. 3D surface over a triangle

The only problem is that one of the edges of the surface is saw-toothed. Between the teeth, where x+y<=4 the surface should be kept so the saw-toothed edge becomes like the other edges. How can I do this?

The R code is below, the input data is here

library(rgl)
mat = matrix(scan("bpexamp.out"),ncol=9,byrow=T)
N <- 4
x <- c(0:N)
y <- c(0:N)
z <- mat[,9]
zlim <- range(y)
zlen <- zlim[2] - zlim[1] + 1
colorlut <- terrain.colors(zlen,alpha=0) # height color lookup table
col <- colorlut[ z-zlim[1]+1 ] # assign colors to heights for each point
open3d()
aspect3d(1,1,0.1)
surface3d(x, y, z, col)
axes3d()

Upvotes: 0

Views: 1259

Answers (1)

Carl Witthoft
Carl Witthoft

Reputation: 21532

This is a comment - but I don't know howto put an image into a comment, so formatted as an answer. I ran yr stuff and got this chart: I ran yr stuff and got this chart: enter image description here

So, what is missing or inaccurate here? We can probably 'fix' it for you...

Upvotes: 1

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