On 05/07/2011 1:36 PM, петрович wrote:
I have a problem with a 3d plot, suppose we have a matrix like this:
v1 v2 v3 v4
jan-2010 0.5 0.25 0.25 0.3
feb-2010 0.35 0.12 0.12 0.4
mar-2010 0.15 0.25 0.25 0.1
and i want to plot this matrix in 3d plot where x-axis is the first
column of the matrix above, y - axis is the first row of the matrix
above and the z-axis is the numbers corresponding, so
z(jan-2010,v3)=0.25
I was trying with persp() but i see that in this function z is a
vector but in my case is a matrix, so i receive an error message
I think this sound no so hard, but actually i couldn´t find a function
doing this, is there actually such a function?
persp() handles exactly the case you describe, but it wants numeric x
and y. You didn't show what you tried, but this works:
x <- 1:3
y <- 1:4
z <- matrix(rnorm(12), nrow=3)
persp(x,y,z, col="red")
It's not a very useful plot with the random data; it might be better
with yours.
Duncan Murdoch
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