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...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 -------------- next part -------------- A non-text attachment was scrubbed... Name: topo1.pdf Type: application/pdf Size: 114859 bytes Desc: topo1.pdf URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20091109/615a9446/attachment-0002.pdf>

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