Message-ID: <4AF87F8E.5010704@stats.uwo.ca>
Date: 2009-11-09T20:46:06Z
From: Duncan Murdoch
Subject: persp function question
In-Reply-To: <2377A6C192169D4AA5CB6110D7F4F5D201446AA49EC8@MAIL-2.UNINE.CH>
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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