Hi BFD, ?geom_contour() *does* have helpful examples. Your Google-foo is weak: Searching for geom_contour brought me: http://ggplot2.tidyverse.org/reference/geom_contour.html as the first result. HTH Ulrik On Mon, 9 Oct 2017 at 08:04 Big Floppy Dog <bigfloppydog at gmail.com> wrote:> Can someone please point me to an example with geom_contour() that uses a > function? The help does not have an example of a function, and also I did > not find anything from online searches. > > TIA, > BFD > > > > ----------------------------------------------------------------------------------------------- > > How about geom_contour()? > > Am So., 8. Okt. 2017, 20:52 schrieb Ranjan Maitra <maitra at email.com>: > > > Hi, > > > > I am no expert on ggplot2 and I do not know the answer to your question. > I > > looked around a bit but could not find an answer right away. But one > > possibility could be, if a direct approach is not possible, to draw > > ellipses corresponding to the confidence regions of the multivariate t > > density and use geom_polygon to draw this successively? > > > > I will wait for a couple of days to see if there is a better answer > posted > > and then write some code, unless you get to it first. > > > > Thanks, > > Ranjan > > > > > > On Sun, 8 Oct 2017 09:30:30 -0500 Big Floppy Dog <bigfloppydog at gmail.com > > > > wrote: > > > > > Note: I have posted this on SO also but while the question has been > > > upvoted, there has been no answer yet. > > > > > > > > > > https://stackoverflow.com/questions/46622243/ggplot-plot-2d-probability-density-function-on-top-of-points-on-ggplot > > > > > > Apologies for those who have seen it there also but I thought that this > > > list of experts may have someone who knows the answer. > > > > > > I have the following example code: > > > > > > > > > > > > require(mvtnorm) > > > require(ggplot2) > > > set.seed(1234) > > > xx <- data.frame(rmvt(100, df = c(13, 13))) > > > ggplot(data = xx, aes(x = X1, y= X2)) + geom_point() + > geom_density2d() > > > > > > > > > > > > It yields a scatterplot of X2 against X1 and a KDE contour plot of the > > > density (as it should). > > > > > > My question is: is it possible to change the contour plot to display > > > the contours > > > > > > of a two-dimensional density function (say dmvt), using ggplot2? > > > > > > The remaining figures in my document are in ggplot2 and therefore I > > > am looking for a ggplot2 solution. > > > > > > Thanks in advance! > > > > > > BFD > > > > > > [[alternative HTML version deleted]] > > > > > > ______________________________________________ > > > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > > > 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. > > > > > > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. >[[alternative HTML version deleted]]

Hello Ulrik, I apologize, but I can not see how to provide a pdf in place of the density function which calculates a KDE (that is, something from the dataset in the example). Can you please point to the specific example that might help? Here is what I get: require(mvtnorm) require(ggplot2) set.seed(1234) xx <- data.frame(rmvt(100, df = c(13, 13))) v <- ggplot(faithfuld, aes(waiting, eruptions, z = drmvt, df = c(13,13))) v + geom_contour() Don't know how to automatically pick scale for object of type function. Defaulting to continuous. Error: Aesthetics must be either length 1 or the same as the data (5625): x, y, z, df Can you please tell me how to use this here? Or is some other example more appropriate? TIA, BFD On Mon, Oct 9, 2017 at 2:22 AM, Ulrik Stervbo <ulrik.stervbo at gmail.com> wrote:> Hi BFD, > > ?geom_contour() *does* have helpful examples. Your Google-foo is weak: > Searching for geom_contour brought me: http://ggplot2.tidyverse. > org/reference/geom_contour.html as the first result. > > HTH > Ulrik > > On Mon, 9 Oct 2017 at 08:04 Big Floppy Dog <bigfloppydog at gmail.com> wrote: > >> Can someone please point me to an example with geom_contour() that uses a >> function? The help does not have an example of a function, and also I did >> not find anything from online searches. >> >> TIA, >> BFD >> >> >> ------------------------------------------------------------ >> ----------------------------------- >> >> How about geom_contour()? >> >> Am So., 8. Okt. 2017, 20:52 schrieb Ranjan Maitra <maitra at email.com>: >> >> > Hi, >> > >> > I am no expert on ggplot2 and I do not know the answer to your >> question. I >> > looked around a bit but could not find an answer right away. But one >> > possibility could be, if a direct approach is not possible, to draw >> > ellipses corresponding to the confidence regions of the multivariate t >> > density and use geom_polygon to draw this successively? >> > >> > I will wait for a couple of days to see if there is a better answer >> posted >> > and then write some code, unless you get to it first. >> > >> > Thanks, >> > Ranjan >> > >> > >> > On Sun, 8 Oct 2017 09:30:30 -0500 Big Floppy Dog < >> bigfloppydog at gmail.com> >> > wrote: >> > >> > > Note: I have posted this on SO also but while the question has been >> > > upvoted, there has been no answer yet. >> > > >> > > >> > >> https://stackoverflow.com/questions/46622243/ggplot- >> plot-2d-probability-density-function-on-top-of-points-on-ggplot >> > > >> > > Apologies for those who have seen it there also but I thought that >> this >> > > list of experts may have someone who knows the answer. >> > > >> > > I have the following example code: >> > > >> > > >> > > >> > > require(mvtnorm) >> > > require(ggplot2) >> > > set.seed(1234) >> > > xx <- data.frame(rmvt(100, df = c(13, 13))) >> > > ggplot(data = xx, aes(x = X1, y= X2)) + geom_point() + >> geom_density2d() >> > > >> > > >> > > >> > > It yields a scatterplot of X2 against X1 and a KDE contour plot of the >> > > density (as it should). >> > > >> > > My question is: is it possible to change the contour plot to display >> > > the contours >> > > >> > > of a two-dimensional density function (say dmvt), using ggplot2? >> > > >> > > The remaining figures in my document are in ggplot2 and therefore I >> > > am looking for a ggplot2 solution. >> > > >> > > Thanks in advance! >> > > >> > > BFD >> > > >> > > [[alternative HTML version deleted]] >> > > >> > > ______________________________________________ >> > > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >> > > 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. >> > > >> > >> > >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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. >> >[[alternative HTML version deleted]]