[R] x axis labelling
Hi, I am new to R and am trying to create a graph with Time(24hr) along the x axis. Rather than start at 01.00, I wanted to start at 14.00. I tried to use the axis(side=1, at=c( )) function but it continues to put then in numeric order. Is there another way I can add labels to the x axis? Thank You. Michael [[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] x axis labelling
Did you add xaxt = n in the plot function? Try the following: plot(x,y, xaxt = n) axis(1, at = c(14, 20),labels = c(14h, 20h) ) 2014-07-01 12:41 GMT-05:00 Michael Millar michael88mil...@hotmail.co.uk: Hi, I am new to R and am trying to create a graph with Time(24hr) along the x axis. Rather than start at 01.00, I wanted to start at 14.00. I tried to use the axis(side=1, at=c( )) function but it continues to put then in numeric order. Is there another way I can add labels to the x axis? Thank You. Michael [[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] x axis labelling
On Tue, 1 Jul 2014 06:41:52 PM Michael Millar wrote: Hi, I am new to R and am trying to create a graph with Time(24hr) along the x axis. Rather than start at 01.00, I wanted to start at 14.00. I tried to use the axis(side=1, at=c( )) function but it continues to put then in numeric order. Is there another way I can add labels to the x axis? Hi Michael, Perhaps this will get you out of trouble. mmdat-data.frame(time=paste(c(14:23,0:13),00,sep=:), wind_speed=sample(0:30,24)) plot(mmdat$wind_speed,type=b,xaxt=n,xlab=Time) axis(1,at=1:24,labels=mmdat$time) If you want to get more tick labels on the time axis, look at staxlab (plotrix). Jim __ 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] x axis labelling
Hi Michael Dates and times are always a problem as they are irregular not 1,2,3 ..., 100 If you want more fancy formatting of the x axis try this First convert your time to a datetime class # Use a dummy date for datetime as it is easier mmdat$time - seq(strptime(20140702 14, %Y%m%d %H), by = hours, length= 24) # only gives numerical sequence on xlab plot(mmdat$wind_speed,type=b,xlab=Time) However library(lattice) ?xyplot # by starting at 15:00 hours get sequence and use formatting of dates xyplot(wind_speed ~time, data = mmdat, type = b, xlab=Time, scales = list(x = list(at = seq(mmdat[2,1], by = 3 hours, length = 8), labels = format(seq(mmdat[2,1], by = 3 hours, length = 8),%H:%M))) ) Duncan Duncan Mackay Department of Agronomy and Soil Science University of New England Armidale NSW 2351 Email: home: mac...@northnet.com.au -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Michael Millar Sent: Wednesday, 2 July 2014 03:42 To: r-help@R-project.org Subject: [R] x axis labelling Hi, I am new to R and am trying to create a graph with Time(24hr) along the x axis. Rather than start at 01.00, I wanted to start at 14.00. I tried to use the axis(side=1, at=c( )) function but it continues to put then in numeric order. Is there another way I can add labels to the x axis? Thank You. Michael [[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] x-axis labelling
Hi Dave, Thanks for your reply. I can't reproduce the last line of code your code. The ifelse argument throws back an error saying it was not used. A On Fri, Feb 1, 2013 at 10:56 PM, David Winsemius dwinsem...@comcast.netwrote: On Feb 1, 2013, at 9:30 AM, Alfredo Tello wrote: Hi Folks! I have a question regarding an issue on which I´ve read a few threads but can´t resolve -- Labelling every other tick mark on the x-axis using factors. Here´s an example: Why not: db-data.frame(date=as.factor(**c(1:50)),var=rnorm(50)) barplot(db$var,names.arg=**ifelse( rep( c(TRUE,FALSE), length=length(levels(db$date) ) ), levels(db$date), ),las=2,cex.axis=0.8,cex=0.**8) barplot(db$var,names.arg=**ifelse( c(TRUE,FALSE), levels(db$date), },las=2,cex.axis=0.8,cex=0.**8) -- David. This labels all the tickmarks in my barplot, which is the default behavior. I would like to label every other tick mark in the barplot -- 1,3,5,7 and so on. Thank you very much for your help! All the best, A -- Alfredo Tello (http://alfredotello.com) Sustainable Aquaculture Group Institute of Aquaculture University of Stirling Scotland, UK. [[alternative HTML version deleted]] __** R-help@r-project.org mailing list https://stat.ethz.ch/mailman/**listinfo/r-helphttps://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/** posting-guide.html http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD Alameda, CA, USA -- Alfredo Tello (http://alfredotello.com) Sustainable Aquaculture Group Institute of Aquaculture University of Stirling Scotland, UK. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] x-axis labelling
On Feb 4, 2013, at 4:00 AM, Alfredo Tello wrote: Hi Dave, Thanks for your reply. I can't reproduce the last line of code your code. The ifelse argument throws back an error saying it was not used. Did you look at your graphics window? On my machine the plot you asked for was created by the preceding line: barplot(db$var, names.arg=ifelse( rep( c(TRUE,FALSE), length=length(levels(db$date) ) ), levels(db$date), ), las=2,cex.axis=0.8,cex=0.8) True, the line in question was copied to the message by mistake, but an arguably workable answer was presented. -- David. A On Fri, Feb 1, 2013 at 10:56 PM, David Winsemius dwinsem...@comcast.net wrote: On Feb 1, 2013, at 9:30 AM, Alfredo Tello wrote: Hi Folks! I have a question regarding an issue on which I´ve read a few threads but can´t resolve -- Labelling every other tick mark on the x-axis using factors. Here´s an example: Why not: db-data.frame(date=as.factor(c(1:50)),var=rnorm(50)) barplot(db$var,names.arg=ifelse( rep( c(TRUE,FALSE), length=length(levels(db$date) ) ), levels(db$date), ),las=2,cex.axis=0.8,cex=0.8) barplot(db$var,names.arg=ifelse( c(TRUE,FALSE), levels(db$date), },las=2,cex.axis=0.8,cex=0.8) -- David. This labels all the tickmarks in my barplot, which is the default behavior. I would like to label every other tick mark in the barplot -- 1,3,5,7 and so on. Thank you very much for your help! All the best, A -- Alfredo Tello (http://alfredotello.com) Sustainable Aquaculture Group Institute of Aquaculture University of Stirling Scotland, UK. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. David Winsemius, MD Alameda, CA, USA -- Alfredo Tello (http://alfredotello.com) Sustainable Aquaculture Group Institute of Aquaculture University of Stirling Scotland, UK. David Winsemius Alameda, CA, USA __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] x-axis labelling
Hi Folks! I have a question regarding an issue on which I´ve read a few threads but can´t resolve -- Labelling every other tick mark on the x-axis using factors. Here´s an example: db-data.frame(date=as.factor(c(1:50)),var=rnorm(50)) barplot(db$var,names.arg=levels(db$date),las=2,cex.axis=0.8,cex=0.8) This labels all the tickmarks in my barplot, which is the default behavior. I would like to label every other tick mark in the barplot -- 1,3,5,7 and so on. Thank you very much for your help! All the best, A -- Alfredo Tello (http://alfredotello.com) Sustainable Aquaculture Group Institute of Aquaculture University of Stirling Scotland, UK. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] x-axis labelling
On Feb 1, 2013, at 9:30 AM, Alfredo Tello wrote: Hi Folks! I have a question regarding an issue on which I´ve read a few threads but can´t resolve -- Labelling every other tick mark on the x-axis using factors. Here´s an example: Why not: db-data.frame(date=as.factor(c(1:50)),var=rnorm(50)) barplot(db$var,names.arg=ifelse( rep( c(TRUE,FALSE), length=length(levels(db$date) ) ), levels(db$date), ),las=2,cex.axis=0.8,cex=0.8) barplot(db$var,names.arg=ifelse( c(TRUE,FALSE), levels(db$date), },las=2,cex.axis=0.8,cex=0.8) -- David. This labels all the tickmarks in my barplot, which is the default behavior. I would like to label every other tick mark in the barplot -- 1,3,5,7 and so on. Thank you very much for your help! All the best, A -- Alfredo Tello (http://alfredotello.com) Sustainable Aquaculture Group Institute of Aquaculture University of Stirling Scotland, UK. [[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. David Winsemius, MD Alameda, CA, USA __ 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.
