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2009 Nov 09
1
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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2004 Feb 28
2
questions about anova
Hello all,
I have two questions about anova (one is probably VERY basic...)
1 - when one asks for a summary of a trend surface created with surf.ls, he/she
gets:
> summary(g3r)
Analysis of Variance Table
Model: surf.ls(np = 3, x = gradiente$east, y = gradiente$north, z =
gradiente$num1)
Sum Sq Df Mean Sq F value Pr(>F)
Regression 215.7182 9 23.968693976