[R] how to control ticks

Yogesh Tiwari yogesh.mpi at googlemail.com
Wed Dec 22 06:24:09 CET 2010


Hi Jim,

Yes you are right, file$time is decimal date. In the attached plot I want to
replace decimal
date with proper time axis so I can show month ticks. Decimal date misleads
sometime
while interpretation. Data varies from Jan-Dec 2009.

Thanks,

Yogesh

On Tue, Dec 21, 2010 at 9:57 PM, jim holtman <jholtman at gmail.com> wrote:

> What is the structure of file$time? Is it Date/POSIXct?  'at=1:12'
> only works if those are the dimensions of file$time.  So give us an
> idea of what the data is (PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html and provide commented,
> minimal, self-contained, reproducible code).
>
>
>
> On Tue, Dec 21, 2010 at 7:36 AM, Yogesh Tiwari
> <yogesh.mpi at googlemail.com> wrote:
> > Hi,
> > I want 12 ticks at axis 1 and want to write Jan-Dec on each.
> >
> > something like:
> >
> > axis(1, at=1:12,
> labels=c('J','F','M','A','M','J','J','A','S','O','N','D'))
> >
> > I could omit default ticks but now how to control ticks.
> >
> > plot(file$time, file$ch4*1000, ylim=c(1500,1700), xaxt='n', xlab= NA,
> > ylab=NA,col="blue",yaxs="i",lwd=2, pch=10, type="b")#
> >
> > axis(1, at=1:12,
> labels=c('J','F','M','A','M','J','J','A','S','O','N','D'))
> >
> > BUT above is not working, and there is no error as well.
> >
> > Pls help,
> >
> > Regards,
> > Yogesh
> >
> >        [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > R-help at 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.
> >
>
>
>
> --
> Jim Holtman
> Data Munger Guru
>
> What is the problem that you are trying to solve?
>



-- 
Yogesh K. Tiwari (Dr.rer.nat),
Scientist,
Centre for Climate Change Research,
Indian Institute of Tropical Meteorology,
Homi Bhabha Road,
Pashan,
Pune-411008
INDIA

Phone: 0091-99 2273 9513 (Cell)
         : 0091-20-25904452 (O)
Fax    : 0091-20-258 93 825


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