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.
