[R] abline function : plot.new has not been called yet

[Frederic Ntirenganya]

Thanks Jeff for the Help. it works correctly.

Regards,
Frederic.

Frederic Ntirenganya
Maseno University,
African Maths Initiative,
Kenya.
Mobile:(+254)718492836
Email: fredo at aims.ac.za
https://sites.google.com/a/aims.ac.za/fredo/

On Sun, Dec 14, 2014 at 11:13 AM, Jeff Newmiller <jdnewmil at dcn.davis.ca.us>
wrote:
>
> The abline function is part of base graphics (read the help ?abline... it
> is part of the "graphics" package).
>
> The xyplot function is part of the lattice package... a clone of the
> original "trellis" package from the S software. The two approaches to
> graphics don't play well together.
>
> Once you know to keep this distinction in mind, you can probably find
> examples on the web, such as [1], or in help files such as ?panel.abline.
>
> [1] http://apcg.uoregon.edu/GeogR/topics/lattice.htm
>
> ---------------------------------------------------------------------------
> Jeff Newmiller                        The     .....       .....  Go Live...
> DCN:<jdnewmil at dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live
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> Sent from my phone. Please excuse my brevity.
>
> On December 13, 2014 11:05:52 PM PST, Frederic Ntirenganya <
> ntfredo at gmail.com> wrote:
> >Hi All,
> >
> >I would like to have an idea of how I can solve this error.
> >
> >I am getting the following error in plotting:
> >
> >> abline(regn,col='red',lwd=1.5 , data=BUTemp)
> >Error in int_abline(a = a, b = b, h = h, v = v, untf = untf, ...) :
> >  plot.new has not been called yet
> >
> >This is the str of my data set
> >
> >> str(BUTemp)
> >'data.frame':    7671 obs. of  6 variables:
> > $ Year : int  1971 1971 1971 1971 1971 1971 1971 1971 1971 1971 ...
> >$ Month: Factor w/ 12 levels "Aug","Sep","Oct",..: 2 2 2 2 2 2 2 2 2 2
> >...
> > $ Day  : int  1 2 3 4 5 6 7 8 9 10 ...
> > $ Rain : num  0 0 0 0 0 0 0 0 0 0 ...
> > $ Tmax : num  24.3 25 25.6 26.5 27.8 27.5 25.7 25.1 26.5 25.1 ...
> > $ Tmin : num  13.5 13.2 12.7 12.7 12.2 14 13.2 12.3 12.8 11.7 ...
> >
> >The code I am using is :
> >
> >require(latticeExtra) # trellis plot for temperature and rain.
> >require(lattice)
> >
> >levels(BUTemp$Month) <- c("Aug", "Sep", "Oct", "Nov", "Dec", "Jan",
> >                          "Feb", "Mar", "Apr", "May", "Jun", "Jul")
> >
> >xyplot(BUTemp$Tmin + BUTemp$Tmax ~ BUTemp$Year | BUTemp$Month,
> >       data =BUTemp , type = "b", pch=19)
> >
> >regn=lm(BUTemp$Tmin + BUTemp$Tmax ~ BUTemp$Year)
> >
> >abline(regn,col='red',lwd=1.5)
> >summary(regn)
> >
> >Thanks  for your help.
> >
> >Regards,
> >Frederic.
> >Frederic Ntirenganya
> >Maseno University,
> >African Maths Initiative,
> >Kenya.
> >Mobile:(+254)718492836
> >Email: fredo at aims.ac.za
> >https://sites.google.com/a/aims.ac.za/fredo/
> >
> >       [[alternative HTML version deleted]]
> >
> >______________________________________________
> >R-help at 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.
>
>

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