Sorry for my bad explanation (french people don't speak english well , it is known). I tried predict.smooth.spline and it's working. The aim of this work was to extract the y for x=1, x=2, x=3 etc on the ploted line.
Thank you for your time. Best Regards Camille REROLLE 2013/5/6 Bert Gunter <gunter.ber...@gene.com>: > With the same possibility of misunderstanding as Rui, this sort of > question is generally answered by predict() methods, in this case: > > ?predict.smooth.spline > > > -- Bert > > On Mon, May 6, 2013 at 8:26 AM, Rui Barradas <ruipbarra...@sapo.pt> wrote: >> Hello, >> >> I'm not sure I understand. If you assign the value of smooth.spline, you'll >> have a list with elements x and y: >> >> dat <- read.table(text = " >> X Y >> 1 0 137.659166666667 >> 2 2.502 152.623333333333 >> 3 4.998 162.391333333333 >> 4 7.501 170.753666666667 >> 5 9.997 174.877 >> 6 12.499 178.4275 >> 7 15.002 184.565 >> 8 17.498 189.8985 >> 9 20 192.6885 >> ", header = TRUE) >> dat >> >> sp <- smooth.spline(dat) >> plot(sp$x, sp$y, type="l") >> >> >> Aren't the values of y you want in sp$y? >> >> Hope this helps, >> >> Rui Barradas >> >> Em 06-05-2013 14:36, camille rérolle escreveu: >>> >>> Dear list, >>> >>> I'm trying to retrieve specific y for a list of x on a drawn line in the >>> plot area. >>> The line is plot with an other list of xy coordinates,which only serve to >>> plot the line. >>> Here is an example of the beginning of a table of initial coordinates >>> which >>> permit to draw the line: >>> X Y >>> "1" 0 137.659166666667 >>> "2" 2.502 152.623333333333 >>> "3" 4.998 162.391333333333 >>> "4" 7.501 170.753666666667 >>> "5" 9.997 174.877 >>> "6" 12.499 178.4275 >>> "7" 15.002 184.565 >>> "8" 17.498 189.8985 >>> "9" 20 192.6885 >>> [...] >>> >>> Here is what I want to do: >>> >>> dossier<- ### path of the table to read >>> table <- read.table(dossier) >>> curv<-plot(smooth.spline(table), >>> type="l",xlim=c(0,100),ylim=c(0,255)) >>> >>> # Now the line is drawn >>> >>> #For x in 1:100 on curv, I want to retrieve each >>> corresponding y and sort coordinates in a table. >>> >>> I search on the forum, the RSiteSearch, the R-intro.pdf, and I read the >>> book >>> of the most common graph packages... >>> But I don't find the specific answer for my problem. >>> Can you help me, please. >>> Kind regards >>> >>> Camille >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > > > > -- > > Bert Gunter > Genentech Nonclinical Biostatistics > > Internal Contact Info: > Phone: 467-7374 > Website: > http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
