[R] Σχετ: Σχετ: Σχετ: plotting dates in x axis

Maria Lathouri mlathouri at yahoo.gr
Tue Feb 28 16:30:29 CET 2017


Hi Petr
I followed your suggestion and I have attached a saved txt file with the data and the script using dput(). I hope this time will work. 
But by the way your code worked as well. 
Many thanks. 
Kind regards,Maria 

    Στις 1:06 μ.μ. Τρίτη, 28 Φεβρουαρίου 2017, ο/η PIKAL Petr <petr.pikal at precheza.cz> έγραψε:
 

 Hi

better to send us your data by copying result of dput()

Based on Jims toy data, do you want something like that?

plot(aa$sdate,aa$var1,xaxt="n")
sel <- seq(1,15, 2)
axis(1, at=axis.dates[sel], labels=format(axis.dates, "%Y")[sel])

You can easily adopt it by managing the sequention.

Cheers
Petr

> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Maria
> Lathouri via R-help
> Sent: Tuesday, February 28, 2017 1:14 PM
> To: r-help at r-project.org; Jim Lemon <drjimlemon at gmail.com>
> Subject: [R] Σχετ: Σχετ: plotting dates in x axis
>
> Dear Jim
> Many thanks for this. I tried and it somehow worked. I removed the nlines=3
> from your script so I can have the years in one line, but still the problem is
> that while trying to show all the years, there are years in the first line and
> then other years in a second line. I was wondering if I can show every two
> years instead. I think it would be much better. Many thanks. Kind
> regards,Maria
>
>    Στις 11:56 π.μ. Τρίτη, 28 Φεβρουαρίου 2017, ο/η Maria Lathouri via R-help
> <r-help at r-project.org> έγραψε:
>
>
>  Dear all,
> Sorry about that. My mistake. Here is an example of my data
> > head(aa)      SDATE  var11 1998-01-29 0.7282 1998-02-17 1.0803
> > 1998-03-20 0.6374 1998-05-07 1.1205 1998-05-26 0.9036 1998-06-05
> > 1.210.........................178 2012-10-4  0.71179 2012-11-4
> > 0.663180 2012-12-10 0.484
> I hope this helps.
> Maria
>
>    Στις 10:00 μ.μ. Δευτέρα, 27 Φεβρουαρίου 2017, ο/η Jeff Newmiller
> <jdnewmil at dcn.davis.ca.us> έγραψε:
>
>
>  While humorous, the term "Mexican Wall" is unlikely to be clear to the OP.
> This is a reference to the mailing list anti-virus strategy of cutting out
> attachments that don't meet a very restrictive set of requirements outlined
> in the Posting Guide that all R-users are supposed to have read and
> memorized, but which few even seem to know exists. You can best avoid the
> "Mexican Wall" by setting your email program to send plain text instead of
> HTML, and to embed your R code example (believe it or not, this is not the
> Excel-To-R translation service, so show us your R code and text data, not your
> Excel file) in the email along with your description of your problem. For more
> help on getting help search the Internet for "R reproducible example".
> --
> Sent from my phone. Please excuse my brevity.
>
> On February 27, 2017 1:11:05 PM PST, Jim Lemon <drjimlemon at gmail.com>
> wrote:
> >Hi Maria,
> >First, Excel files don't make it through the Mexican Wall. A CSV with
> >the extension changed to .txt might. You can get all of the years like
> >this:
> >
> >aa<-data.frame(var1=runif(180),
> > SDATE=paste(sample(1998:2012,180,TRUE),
> > sample(1:12,180,TRUE),sample(1:28,180,TRUE),sep="-"))
> >aa$sdate<-as.Date(aa$SDATE)
> >plot(aa$sdate,aa$var1,xaxt="n")
> >library(plotrix)
> ># set the tick marks at the middle of each year
> >axis.dates<-as.Date(paste(1998:2012,6,30,sep="-"))
> >staxlab(1,axis.dates,1998:2012,nlines=3)
> >
> >Obviously you don't want all of the months, so just add the months to
> >the years:
> >
> >plot(aa$sdate,aa$var1,xaxt="n")
> >staxlab(1,axis.dates,format(axis.dates,"%b/%Y"),nlines=3)
> >
> >Jim
> >
> >
> >On Tue, Feb 28, 2017 at 2:26 AM, Maria Lathouri via R-help
> ><r-help at r-project.org> wrote:
> >> Dear all,
> >> I have an excel file of 180 observations with dates and one variable,
> >from 1998 to 2012 by random months (there are some years that I might
> >not have all the months or I might have two observations in one month).
> >I am trying to plot the dates in x axis and the variable in y axis. I
> >have already used as.Date for the dates so I can import them into R.
> >> Here is my script:> aa<-read.csv("aa.csv")> attach(aa)>
> >names(aa)#"SDATE" "var1"
> >> I convert the dates into R: > sdate<-as.Date(SDATE,
> >format="%Y-%m-%d")
> >>
> >> I am plotting the dates with my var1:> plot(sdate, var1, type="l") Up
> >> to now, everything seems ok. However, in the x-axis I only get
> >three years, 2000, 2005 and 2010. As I want to show all the years or at
> >least as many as it could be, I am using the following:
> >>> plot(sdate, var1, type="l", xaxt="n")
> >>
> >>> d1<-c((sdate[1]), (sdate[183]))> d2<-as.Date((d1[1])+365*(0:15))
> >>> axis(side=1, at=0:15, labels=strftime(d2, format="%Y"),
> >cex.axis=0.8,las=2);  I tried also to plot the dates in a month-Year
> >form:
> >>
> >>> d2<-as.Date((d1[1])+150*(0:20))
> >>> plot(sdate, var1, type="l", xaxt="n")> axis(side=1, at=0:15,
> >labels=strftime(d2, format="%m-%Y"), cex.axis=0.8,las=2)
> >>
> >> But nothing happened. I cannot understand why it doesn't show
> >anything.
> >> I have attached the file as well in case you want to have a more
> >clear picture.
> >> I really appreciate it if you can help me on this.
> >> Thank you very much in advance.
> >> Kind regards,Maria
> >> ______________________________________________
> >> 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.
> >
> >______________________________________________
> >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.
>
>
>    [[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.
>
>
>      [[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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