On 18/05/2010 6:46 AM, Megh Dal wrote:
Thanks Duncan for your reply. This could definitely be an answer of my query
however I wanted something else. What I want is to draw 2 lines over the
surface which pass through x=3,4
That's even more ambiguous than your original request, so I won't try to
code it. The general solution to draw a line segment is to work out end
points (x1,y1,z1) and (x2,y2,z2), and then call
segments3d(c(x1,x2), c(y1,y2), c(z1, z2), ...)
where the ... specifies things like the colour, etc.
Duncan Murdoch
Any better idea?
Thanks,
--- On Tue, 5/18/10, Duncan Murdoch <murdoch.dun...@gmail.com> wrote:
From: Duncan Murdoch <murdoch.dun...@gmail.com>
Subject: Re: [R] [RGL] Need help to modify current plot
To: "Megh Dal" <megh700...@yahoo.com>
Cc: r-h...@stat.math.ethz.ch
Date: Tuesday, May 18, 2010, 3:51 PM
Megh Dal wrote:
Dear folks, I have created a plot on RGL device :
x = 1:6
y = seq(-12, 5, by=1)
z = matrix(0, length(y), length(x))
z[13,3] = 1; z[13,4] = 1.011765
surface3d(x, y, t(z), col=rainbow(1000))
grid3d(c("x-", "y-", "z"))
Now I want to draw 2 lines along x=3 & x=4, over the surface (with different
colour). Could somebody help me how to draw that?
x=3 and x=4 specify planes, not lines, so you'll need to give more information
to choose lines. Here's one possibility:
save <- par3d(ignoreExtent=TRUE)
segments3d(c(3,3,4,4), c(min(y), max(y), min(y), max(y)), c(max(z), max(z), max(z),
max(z)), col="red")
par3d(save)
Duncan Murdoch
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