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?
Thanks,
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