[R] highlight overlapping region of two densities
Hi all. I would like to highlight overlapping regions of two densities and I could not find a way to do it. Here is the sample code: myd - c(2,4,5, 4,3,2,2,3,3,3,2,3,3,4,2,4,3,3,3,2,2.5, 2, 3,3, 2.3, 3, 3, 2, 3) myd1 - myd-2 plot(range(density(myd)$x, density(myd1)$x), range(density(myd)$y, density(myd1)$y), type = n) lines(density(myd), col=1, lwd=4) lines(density(myd1), col=2, lwd=4, lty=2) So, I am trying to highlight the region from 1 to 4, on x axis, taking the minimum value of corresponding y values. I am aware of polygon function but don't know how to define correctly x and y coordinate vectors for this function. Could someone help me to solve this? Thank in advance. Andrija [[alternative HTML version deleted]] __ 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.
Re: [R] highlight overlapping region of two densities
Hi Andrija, As far as I understood, your problem comes from the density() function - the domains of myd and myd1 are different, which causes slightly shifted x values in the density() output. A simple workaround (which you maybe already came up with): dens1 - density(myd, from=-1, to=6) # force both densities on same domains, dens2 - density(myd1, from=-1, to=6) # which facilitates drawing plot(range(dens1$x, dens2$x), range(dens1$y, dens2$y), type = n) lines(dens1, col=1, lwd=4) lines(dens2, col=2, lwd=4, lty=2) polygon(dens1$x, pmin(dens1$y, dens2$y), col=grey) But doing so causes inelegant distribution tails... Maybe somebody will have a more elegant suggestion ? Pierrick Bruneau CRP Gabriel Lippmann On Wed, Mar 20, 2013 at 1:32 PM, andrija djurovic djandr...@gmail.comwrote: Hi all. I would like to highlight overlapping regions of two densities and I could not find a way to do it. Here is the sample code: myd - c(2,4,5, 4,3,2,2,3,3,3,2,3,3,4,2,4,3,3,3,2,2.5, 2, 3,3, 2.3, 3, 3, 2, 3) myd1 - myd-2 plot(range(density(myd)$x, density(myd1)$x), range(density(myd)$y, density(myd1)$y), type = n) lines(density(myd), col=1, lwd=4) lines(density(myd1), col=2, lwd=4, lty=2) So, I am trying to highlight the region from 1 to 4, on x axis, taking the minimum value of corresponding y values. I am aware of polygon function but don't know how to define correctly x and y coordinate vectors for this function. Could someone help me to solve this? Thank in advance. Andrija [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] highlight overlapping region of two densities
Hi Pierrick, thanks for reply. This is the closest solution that I got. I also found something like this: dens1 - density(myd) dens2 - density(myd1) plot(range(dens1$x, dens2$x), range(dens1$y, dens2$y), type = n) polygon(dens1$x, dens1$y, col = rgb(1,0,0, .5),lwd=4, lty=2) polygon(dens2$x, dens2$y, col = rgb(0,0,1, .5),lwd=4) Your solution is closer to what I want but also solution above can be, maybe, useful. Thank you Andrija On Wed, Mar 20, 2013 at 2:20 PM, Pierrick Bruneau pbrun...@gmail.comwrote: Hi Andrija, As far as I understood, your problem comes from the density() function - the domains of myd and myd1 are different, which causes slightly shifted x values in the density() output. A simple workaround (which you maybe already came up with): dens1 - density(myd, from=-1, to=6) # force both densities on same domains, dens2 - density(myd1, from=-1, to=6) # which facilitates drawing plot(range(dens1$x, dens2$x), range(dens1$y, dens2$y), type = n) lines(dens1, col=1, lwd=4) lines(dens2, col=2, lwd=4, lty=2) polygon(dens1$x, pmin(dens1$y, dens2$y), col=grey) But doing so causes inelegant distribution tails... Maybe somebody will have a more elegant suggestion ? Pierrick Bruneau CRP Gabriel Lippmann On Wed, Mar 20, 2013 at 1:32 PM, andrija djurovic djandr...@gmail.comwrote: Hi all. I would like to highlight overlapping regions of two densities and I could not find a way to do it. Here is the sample code: myd - c(2,4,5, 4,3,2,2,3,3,3,2,3,3,4,2,4,3,3,3,2,2.5, 2, 3,3, 2.3, 3, 3, 2, 3) myd1 - myd-2 plot(range(density(myd)$x, density(myd1)$x), range(density(myd)$y, density(myd1)$y), type = n) lines(density(myd), col=1, lwd=4) lines(density(myd1), col=2, lwd=4, lty=2) So, I am trying to highlight the region from 1 to 4, on x axis, taking the minimum value of corresponding y values. I am aware of polygon function but don't know how to define correctly x and y coordinate vectors for this function. Could someone help me to solve this? Thank in advance. Andrija [[alternative HTML version deleted]] __ 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. [[alternative HTML version deleted]] __ 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.
Re: [R] highlight overlapping region of two densities
Le 20/03/13 13:32, andrija djurovic a écrit : Hi all. I would like to highlight overlapping regions of two densities and I could not find a way to do it. Here is the sample code: myd - c(2,4,5, 4,3,2,2,3,3,3,2,3,3,4,2,4,3,3,3,2,2.5, 2, 3,3, 2.3, 3, 3, 2, 3) myd1 - myd-2 plot(range(density(myd)$x, density(myd1)$x), range(density(myd)$y, density(myd1)$y), type = n) lines(density(myd), col=1, lwd=4) lines(density(myd1), col=2, lwd=4, lty=2) So, I am trying to highlight the region from 1 to 4, on x axis, taking the minimum value of corresponding y values. I am aware of polygon function but don't know how to define correctly x and y coordinate vectors for this function. Could someone help me to solve this? Thank in advance. Andrija Here is another solution. Marc myd - c(2,4,5, 4,3,2,2,3,3,3,2,3,3,4,2,4,3,3,3,2,2.5, 2, 3,3, 2.3, 3, 3, 2, 3) myd1 - myd-2 plot(range(density(myd)$x, density(myd1)$x), range(density(myd)$y, density(myd1)$y), type = n) # lines(density(myd), col=1, lwd=4) # lines(density(myd1), col=2, lwd=4, lty=2) d0x - density(myd)$x d0y - density(myd)$y d1x - density(myd1)$x d1y - density(myd1)$y polygon(d0x, d0y, col=red, border=FALSE) polygon(d1x, d1y, col=rgb(0, 1, 0, 0.5), border=FALSE) -- __ Marc Girondot, Pr Laboratoire Ecologie, Systématique et Evolution Equipe de Conservation des Populations et des Communautés CNRS, AgroParisTech et Université Paris-Sud 11 , UMR 8079 Bâtiment 362 91405 Orsay Cedex, France Tel: 33 1 (0)1.69.15.72.30 Fax: 33 1 (0)1.69.15.73.53 e-mail: marc.giron...@u-psud.fr Web: http://www.ese.u-psud.fr/epc/conservation/Marc.html Skype: girondot __ 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.
Re: [R] highlight overlapping region of two densities
Hello, Try the following. d0 - density(myd) d1 - density(myd1) idx0 - d0$x = 1 d0$x = 4 idx1 - d1$x = 1 d1$x = 4 yy - apply(cbind(d0$y[idx0], d1$y[idx1]), 1, min) xx - d0$x[idx0] xx - c(xx[1], xx, xx[1]) yy - c(0, yy, 0) polygon(xx, yy, col = blue) Hope this helps, Rui Barradas Em 20-03-2013 12:32, andrija djurovic escreveu: Hi all. I would like to highlight overlapping regions of two densities and I could not find a way to do it. Here is the sample code: myd - c(2,4,5, 4,3,2,2,3,3,3,2,3,3,4,2,4,3,3,3,2,2.5, 2, 3,3, 2.3, 3, 3, 2, 3) myd1 - myd-2 plot(range(density(myd)$x, density(myd1)$x), range(density(myd)$y, density(myd1)$y), type = n) lines(density(myd), col=1, lwd=4) lines(density(myd1), col=2, lwd=4, lty=2) So, I am trying to highlight the region from 1 to 4, on x axis, taking the minimum value of corresponding y values. I am aware of polygon function but don't know how to define correctly x and y coordinate vectors for this function. Could someone help me to solve this? Thank in advance. Andrija [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] highlight overlapping region of two densities
Hi Rui. Thank you very much. I had similar idea like yours but your is more elegant. Andrija On Wed, Mar 20, 2013 at 4:03 PM, Rui Barradas ruipbarra...@sapo.pt wrote: Hello, Try the following. d0 - density(myd) d1 - density(myd1) idx0 - d0$x = 1 d0$x = 4 idx1 - d1$x = 1 d1$x = 4 yy - apply(cbind(d0$y[idx0], d1$y[idx1]), 1, min) xx - d0$x[idx0] xx - c(xx[1], xx, xx[1]) yy - c(0, yy, 0) polygon(xx, yy, col = blue) Hope this helps, Rui Barradas Em 20-03-2013 12:32, andrija djurovic escreveu: Hi all. I would like to highlight overlapping regions of two densities and I could not find a way to do it. Here is the sample code: myd - c(2,4,5, 4,3,2,2,3,3,3,2,3,3,4,2,4,3,3,**3,2,2.5, 2, 3,3, 2.3, 3, 3, 2, 3) myd1 - myd-2 plot(range(density(myd)$x, density(myd1)$x), range(density(myd)$y, density(myd1)$y), type = n) lines(density(myd), col=1, lwd=4) lines(density(myd1), col=2, lwd=4, lty=2) So, I am trying to highlight the region from 1 to 4, on x axis, taking the minimum value of corresponding y values. I am aware of polygon function but don't know how to define correctly x and y coordinate vectors for this function. Could someone help me to solve this? Thank in advance. Andrija [[alternative HTML version deleted]] __** R-help@r-project.org mailing list https://stat.ethz.ch/mailman/**listinfo/r-helphttps://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/** posting-guide.html http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]] __ 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.
