[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
