[R] persp plot increasing 'x' and 'y' values expected

Michael Dondrup michael.dondrup at cebitec.uni-bielefeld.de
Tue Apr 25 12:07:55 CEST 2006

yes, your x and y are increasing but the (x,y) coordinates are not unique.
Looks like some measurements are redundant in your input.
> 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?
> best regards
> andreas
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