Hmm, well, of course this is tested, and it produces a plot, but not the correct one ;) Sorry, that was too quick....
Am Tuesday 25 April 2006 12:51 schrieb Duncan Murdoch: > On 4/25/2006 6:23 AM, Michael Dondrup wrote: > > Hi, > > of course it can't because the number of unique values is different. You > > need a unique _combination_ of x,y and hopefully you don't have different > > z values for any such a pair. try: > > > > xyz <- unique(cbind(x,y,z)) > > persp(xyz) > > > > If you still get the err, then you had different measurements for the > > same point. > > I think you and Andreas want scatterplot3d (from a contributed package > of the same name), not persp. Persp takes very data in a very > particular format. See the man page. > > In general, it's a good idea to test your suggestions before posting > them. Yours wouldn't work, because x, y and z *must not* be the same > length in persp. > > Duncan Murdoch > > > Am Tuesday 25 April 2006 12:24 schrieb [EMAIL PROTECTED]: > >> 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 > >> > >> ______________________________________________ > >> R-help@stat.math.ethz.ch mailing list > >> https://stat.ethz.ch/mailman/listinfo/r-help > >> PLEASE do read the posting guide! > >> http://www.R-project.org/posting-guide.html > > > > ______________________________________________ > > R-help@stat.math.ethz.ch mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide! > > http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
