[R] barplot() options for intervals on axes
Hello, I am a beginner with R. I read many tutorials and the FAQ but I cannot solve my problem. I use barplot() to view my graph. I try to get more interval marks on y axis. I wasn't able to find options in 'help(barplot)' or 'help(par)' to do this with barplot(). I seek for another option to print y values on my bars like on the graph of the R homepage: http://www.r-project.org/ Thanks for your help. -- Sebastien MORETTI Linux User - #327894 CNRS - IGS 31 chemin Joseph Aiguier 13402 Marseille cedex 20, FRANCE tel. +33 (0)4 91 16 44 55 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] barplot() options for intervals on axes
Sebastien Moretti wrote: Hello, I am a beginner with R. I read many tutorials and the FAQ but I cannot solve my problem. I use barplot() to view my graph. I try to get more interval marks on y axis. I wasn't able to find options in 'help(barplot)' or 'help(par)' to do this with barplot(). See ?par and ?axis. You might want to omit the y-axis completely at first (argument yaxt=n) and add one manually useing axis(2, ). I seek for another option to print y values on my bars like on the graph of the R homepage: http://www.r-project.org/ Click on the image and see the code how it was generated. Uwe Ligges Thanks for your help. __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] barplot() options for intervals on axes
Did you see the lab argument to par()? 'lab' A numerical vector of the form 'c(x, y, len)' which modifies the way that axes are annotated. The values of 'x' and 'y' give the (approximate) number of tickmarks on the x and y axes and 'len' specifies the label size. The default is 'c(5, 5, 7)'. _Currently_, 'len' _is unimplemented_. You might want something like this: par(lab=c(5,10,7)) barplot(runif(10)) Sebastien Moretti wrote: Hello, I am a beginner with R. I read many tutorials and the FAQ but I cannot solve my problem. I use barplot() to view my graph. I try to get more interval marks on y axis. I wasn't able to find options in 'help(barplot)' or 'help(par)' to do this with barplot(). I seek for another option to print y values on my bars like on the graph of the R homepage: http://www.r-project.org/ Thanks for your help. -- Chuck Cleland, Ph.D. NDRI, Inc. 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 452-1424 (M, W, F) fax: (917) 438-0894 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] barplot() options for intervals on axes
Did you see the lab argument to par()? 'lab' A numerical vector of the form 'c(x, y, len)' which modifies the way that axes are annotated. The values of 'x' and 'y' give the (approximate) number of tickmarks on the x and y axes and 'len' specifies the label size. The default is 'c(5, 5, 7)'. _Currently_, 'len' _is unimplemented_. You might want something like this: par(lab=c(5,10,7)) barplot(runif(10)) 'lab' doesn't change my graph. It is always the same. Maybe it doesn't work with other options I use in barplot: barplot(y,xlab=Number of splice variants,ylab=Number of genes,col=red1,names.arg=x,border=red1,axes=TRUE,ylim=c(0,max(y))) Hello, I am a beginner with R. I read many tutorials and the FAQ but I cannot solve my problem. I use barplot() to view my graph. I try to get more interval marks on y axis. I wasn't able to find options in 'help(barplot)' or 'help(par)' to do this with barplot(). I seek for another option to print y values on my bars like on the graph of the R homepage: http://www.r-project.org/ Thanks for your help. -- Sebastien MORETTI Linux User - #327894 CNRS - IGS 31 chemin Joseph Aiguier 13402 Marseille cedex 20, FRANCE tel. +33 (0)4 91 16 44 55 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] barplot() options for intervals on axes
On Mon, 2004-12-06 at 15:30 +0100, Sebastien Moretti wrote: Hello, I am a beginner with R. I read many tutorials and the FAQ but I cannot solve my problem. I use barplot() to view my graph. I try to get more interval marks on y axis. I wasn't able to find options in 'help(barplot)' or 'help(par)' to do this with barplot(). I seek for another option to print y values on my bars like on the graph of the R homepage: http://www.r-project.org/ Thanks for your help. The general process of customizing the annotation of the axes for a variety of plots is posted frequently to this e-mail list, so a search of the archive using axis as the keyword yields almost 2,000 hits. Using axis labels narrows that to 650, which are more relevant. The key is to inhibit the generation of the default y axis by using the argument 'yaxt = n': Compare: barplot(1:5) versus barplot(1:5, yaxt = n) You can then use the axis() function to customize the y axis values: barplot(1:5, yaxt = n) axis(2, at = seq(0, 5, 0.25), las = 1) help(par) provides additional information on the graphic parameters, which are the key to these types of customizations. See ?axis for more information on that function as well. To your second query, the key is to note that barplot() returns the bar midpoints, which is referenced in the Value section of ?barplot. Thus: mp - barplot(1:5, yaxt = n, ylim = c(0, 6)) axis(2, at = seq(0, 5, 0.25), las = 1) text(mp, 1:5, labels = 1:5, pos = 3) See ?text for more information. Also, note that I increased the range of the y axis here to make room for the bar text labels (primarily the final tallest bar). Finally, there is an article in the R Help Desk section of the October 2003 R News on basic graphic operations in R, which you might find helpful. A direct link to it is: http://cran.r-project.org/doc/Rnews/Rnews_2003-2.pdf HTH, Marc Schwartz __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] barplot() options for intervals on axes
Hello, I am a beginner with R. I read many tutorials and the FAQ but I cannot solve my problem. I use barplot() to view my graph. I try to get more interval marks on y axis. I wasn't able to find options in 'help(barplot)' or 'help(par)' to do this with barplot(). I seek for another option to print y values on my bars like on the graph of the R homepage: http://www.r-project.org/ Thanks for your help. The general process of customizing the annotation of the axes for a variety of plots is posted frequently to this e-mail list, so a search of the archive using axis as the keyword yields almost 2,000 hits. Using axis labels narrows that to 650, which are more relevant. The key is to inhibit the generation of the default y axis by using the argument 'yaxt = n': Compare: barplot(1:5) versus barplot(1:5, yaxt = n) You can then use the axis() function to customize the y axis values: barplot(1:5, yaxt = n) axis(2, at = seq(0, 5, 0.25), las = 1) It's exactly what I seek for ! There are too many answers in the FAQ. So, I use axis(2,at=c(0,round(max(y)/8),round(max(y)/4),round(max(y)/2),round(3*max(y)/4),max(y))) to print the vertical axe I want. help(par) provides additional information on the graphic parameters, which are the key to these types of customizations. See ?axis for more information on that function as well. To your second query, the key is to note that barplot() returns the bar midpoints, which is referenced in the Value section of ?barplot. Thus: mp - barplot(1:5, yaxt = n, ylim = c(0, 6)) axis(2, at = seq(0, 5, 0.25), las = 1) text(mp, 1:5, labels = 1:5, pos = 3) The text() command prints y value labels over my bars Maybe some examples like that should be in the R manual Thanks See ?text for more information. Also, note that I increased the range of the y axis here to make room for the bar text labels (primarily the final tallest bar). Finally, there is an article in the R Help Desk section of the October 2003 R News on basic graphic operations in R, which you might find helpful. A direct link to it is: http://cran.r-project.org/doc/Rnews/Rnews_2003-2.pdf HTH, Marc Schwartz -- Sebastien MORETTI Linux User - #327894 CNRS - IGS 31 chemin Joseph Aiguier 13402 Marseille cedex 20, FRANCE tel. +33 (0)4 91 16 44 55 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Re: [R] barplot() options for intervals on axes
On Mon, 2004-12-06 at 16:31 +0100, Sebastien Moretti wrote: There are too many answers in the FAQ. Given the discussions here of late, I suspect that there will be one or two folks who might disagree with that statement... ;-) Marc __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Fwd: Re: [R] barplot() options for intervals on axes
There are too many answers in the FAQ. For this topic ! Marc Schwartz -- Sebastien MORETTI Linux User - #327894 CNRS - IGS 31 chemin Joseph Aiguier 13402 Marseille cedex 20, FRANCE tel. +33 (0)4 91 16 44 55 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
