Re: [R] x-axis tick marks on log scale plot
Very, very nice. Thanks for sharing.
On 5/20/2016 4:21 AM, Martin Maechler wrote:
>> Brian Smith
>> on Thu, 19 May 2016 11:04:55 -0400 writes:
> > Thanks all !! On Thu, May 19, 2016 at 9:55 AM, Ivan
> > Calandra wrote:
>
> >> Hi,
> >>
> >> You can do it by first plotting your values without the
> >> x-axis: plot(x,y,log="xy", xaxt="n")
> >>
> >> and then plotting the x-axis with ticks where you need to:
> >> axis(side=1, at=seq(2000,8000,1000))
>
> Getting nicer looking axis ticks for log-scale axes (and
> traditional graphics) I have created the function
> eaxis()
> and utility functionpretty10exp(.)
>
> and I also created standard R's axTicks(.) to help with these.
>
> if(!require("sfsmisc")) install.packages("sfsmisc")
> require("sfsmisc")
>
> x <- lseq(1e-10, 0.1, length = 201)
> plot(x, pt(x, df=3), type = "l", xaxt = "n", log = "x")
> eaxis(1)
>
> gives the attached plot
>
>
>
> __
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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[[alternative HTML version deleted]]
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Re: [R] x-axis tick marks on log scale plot
> Brian Smith
> on Thu, 19 May 2016 11:04:55 -0400 writes:
> Thanks all !! On Thu, May 19, 2016 at 9:55 AM, Ivan
> Calandra wrote:
>> Hi,
>>
>> You can do it by first plotting your values without the
>> x-axis: plot(x,y,log="xy", xaxt="n")
>>
>> and then plotting the x-axis with ticks where you need to:
>> axis(side=1, at=seq(2000,8000,1000))
Getting nicer looking axis ticks for log-scale axes (and
traditional graphics) I have created the function
eaxis()
and utility functionpretty10exp(.)
and I also created standard R's axTicks(.) to help with these.
if(!require("sfsmisc")) install.packages("sfsmisc")
require("sfsmisc")
x <- lseq(1e-10, 0.1, length = 201)
plot(x, pt(x, df=3), type = "l", xaxt = "n", log = "x")
eaxis(1)
gives the attached plot
eaxis-log-example.pdf
Description: Adobe PDF document
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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 tick marks on log scale plot
Thanks all !! On Thu, May 19, 2016 at 9:55 AM, Ivan Calandra wrote: > Hi, > > You can do it by first plotting your values without the x-axis: > plot(x,y,log="xy", xaxt="n") > > and then plotting the x-axis with ticks where you need to: > axis(side=1, at=seq(2000,8000,1000)) > > HTH, > Ivan > > -- > Ivan Calandra, PhD > Scientific Mediator > University of Reims Champagne-Ardenne > GEGENAA - EA 3795 > CREA - 2 esplanade Roland Garros > 51100 Reims, France > +33(0)3 26 77 36 89 > ivan.calan...@univ-reims.fr > -- > https://www.researchgate.net/profile/Ivan_Calandra > https://publons.com/author/705639/ > > > Le 19/05/2016 à 15:40, Brian Smith a écrit : > >> Hi, >> >> I have a plot with log scale on the axes. How do I add ticks and labels in >> addition to the ones provided by default? Can I specify where I want the >> ticks and labels? >> >> For example: >> >> set.seed(12345) >> x <- sample(1:1,10) >> y <- sample(1:1,10) >> >> plot(x,y,log="xy") >> >> >> For me, this plot has tick marks (and labels) at 2000, 4000, 6000, 8000. >> How can I make the axes so that it has marks and labels at 1000 intervals >> (i.e. 2000, 3000, 4000, etc.) >> >> thanks! >> >> [[alternative HTML version deleted]] >> >> __ >> R-help@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. >> >> > __ > R-help@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@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.
Re: [R] x-axis tick marks on log scale plot
Hi, You can do it by first plotting your values without the x-axis: plot(x,y,log="xy", xaxt="n") and then plotting the x-axis with ticks where you need to: axis(side=1, at=seq(2000,8000,1000)) HTH, Ivan -- Ivan Calandra, PhD Scientific Mediator University of Reims Champagne-Ardenne GEGENAA - EA 3795 CREA - 2 esplanade Roland Garros 51100 Reims, France +33(0)3 26 77 36 89 ivan.calan...@univ-reims.fr -- https://www.researchgate.net/profile/Ivan_Calandra https://publons.com/author/705639/ Le 19/05/2016 à 15:40, Brian Smith a écrit : Hi, I have a plot with log scale on the axes. How do I add ticks and labels in addition to the ones provided by default? Can I specify where I want the ticks and labels? For example: set.seed(12345) x <- sample(1:1,10) y <- sample(1:1,10) plot(x,y,log="xy") For me, this plot has tick marks (and labels) at 2000, 4000, 6000, 8000. How can I make the axes so that it has marks and labels at 1000 intervals (i.e. 2000, 3000, 4000, etc.) thanks! [[alternative HTML version deleted]] __ R-help@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. __ R-help@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.
Re: [R] x-axis tick marks on log scale plot
On 19/05/2016 9:40 AM, Brian Smith wrote: Hi, I have a plot with log scale on the axes. How do I add ticks and labels in addition to the ones provided by default? Can I specify where I want the ticks and labels? For example: set.seed(12345) x <- sample(1:1,10) y <- sample(1:1,10) plot(x,y,log="xy") For me, this plot has tick marks (and labels) at 2000, 4000, 6000, 8000. How can I make the axes so that it has marks and labels at 1000 intervals (i.e. 2000, 3000, 4000, etc.) You'll get ticks on side 1 (the x axis) by using axis(1, at=1000*(2:10)) You'll get labels at some of those locations; R will leave some out, if it looks as though the labels will overlap. Using las=2 will make them perpendicular to the axis, and all should be drawn. Duncan Murdoch __ R-help@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.
