hi peter, thank you for your advice. ok, i see the problem, but if i do
x<-unique(data$x) y<-unique(data$y) z<-matrix(unique(data$z),length(y),length(x)) it also doesn't work. i want to do a plot, where i can see, how x and y influences z. P Ehlers wrote: > [EMAIL PROTECTED] wrote: >> hello, >> >> i do the following in order to get an persp-plot >> >> x<-c(2,2,2,2,2,2,3,3,3,3) >> y<-c(41,41,83,83,124,166,208,208,208,208) >> z<-c(90366,90366,92240,92240,92240,96473,100995,100995,100995,100995) >> x<-data$x >> y<-data$y >> z<-matrix(data$z,length(y),length(x)) >> persp(x,y,z, col="gray") >> >> but i always get the error message increasing 'x' and 'y' values >> expected, but i think my data values are already increasing, what is >> wrong? > > > I'm not sure what your data$x, data$y, data$z are (but I can guess). > Why do you think that your x is *increasing*? Is x[i+1] > x[i]? > Does diff(x) yield only positive values? > > What kind of a perspective plot do you expect? You seem to have only > 5 unique points. > > Peter Ehlers > > >> >> best regards >> andreas >> > > > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
