Terrific! How could I've missed that. Well, I know, I didn't get it from the documentation...
Thanks Regards/Cordialement Benoit Boulinguiez -----Message d'origine----- De : Duncan Murdoch [mailto:murd...@stats.uwo.ca] Envoyé : samedi 20 mars 2010 14:54 À : Benoit Boulinguiez Cc : r-help@r-project.org Objet : Re: [R] grid lines aligned on each ticks with a log scale On 20/03/2010 7:35 AM, Duncan Murdoch wrote: > On 20/03/2010 6:38 AM, Benoit Boulinguiez wrote: >> Hi all, >> >> for publication purpose I must provide a graph with grid lines >> aligned with each tick mark. >> Thing is that the graph has a log scale on the x-axis. >> I looked at the grid() and par() documentation but still don't figure >> out how to get it done. >> >> >> simple example >> >> plot(seq(1,9), log="x", panel.first=grid()) >> >> how to get lines at x = 2 and 5 on the graph? > > Use abline instead of grid for fine tuning: > > plot(seq(1,9), log="x", panel.first=abline(v=c(1,2,5),h=c(2,4,6,8), > lty=3,col="gray")) or more simply, just use equilogs=FALSE in the grid call: plot(seq(1,9), log="x", panel.first=grid(equilogs=FALSE)) Duncan Murdoch > > Duncan Murdoch > >> Of course the option "nx" in grid() is not valid, as it does not >> align the grid lines with the ticks in a log scale... >> >> Thanks for giving a hand. >> >> Regards/Cordialement >> >> ------------- >> Benoit Boulinguiez >> Ph.D student >> Ecole de Chimie de Rennes (ENSCR) Bureau 1.20 Equipe CIP UMR CNRS >> 6226 "Sciences Chimiques de Rennes" >> Avenue du Général Leclerc >> CS 50837 >> 35708 Rennes CEDEX 7 >> Tel 33 (0)2 23 23 80 83 >> Fax 33 (0)2 23 23 81 20 >> <http://www.ensc-rennes.fr/> http://www.ensc-rennes.fr/ >> >> >> >> [[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. ______________________________________________ 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.