R help - Nov 2009 - persp function question

Hello,
I have a question about persp function:
I made my classical matrix with x, y and z variables and I dont know why I
obtain a 3D image with overestimate heights.

Here is my script:

microtopo = read.csv2("topo2.csv", dec=".")
attach(microtopo)
require(akima)  # for persp or
zz <-interp (x, y, z)
persp(zz)



See also my attach file



Thanks,

Best regards



JS

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On 11/9/2009 1:00 PM, STEFFEN Julie wrote:
> Hello,
> I have a question about persp function:
> I made my classical matrix with x, y and z variables and I dont know why I
obtain a 3D image with overestimate heights.
How can you tell it overestimates heights?  There's no scale given.

Duncan Murdoch
> Here is my script:
> 
> microtopo = read.csv2("topo2.csv", dec=".")
> attach(microtopo)
> require(akima)  # for persp or
> zz <-interp (x, y, z)
> persp(zz)
> 
> 
> 
> See also my attach file
> 
> 
> 
> Thanks,
> 
> Best regards
> 
> 
> 
> JS
> 
> 
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