# [R] time series plot: x-axis problem

arun smartpink111 at yahoo.com
Fri Apr 26 15:30:23 CEST 2013

```
Hi,

labs <- format(as.Date(time(rr)), "%b-%Y")
#Error in as.Date.default(time(rr)) :
# do not know how to convert 'time(rr)' to class “Date”

#I guess this needs library(zoo)

library(zoo)
labs <- format(as.Date(time(rr)), "%b-%Y")

sessionInfo()
R version 3.0.0 (2013-04-03)
Platform: x86_64-unknown-linux-gnu (64-bit)

#or
z<- zoo(rr)
lab1<-as.yearmon(index(z))
plot(rr, xlab="2012 - 2013", ylab="event freq", xaxt = "n", col="blue")
axis(1, time(rr), lab1,    cex.axis = .9, tcl = -.5, las = 2)
A.K.

----- Original Message -----
To: Jerry <i89rt5 at gmail.com>
Cc: r-help at r-project.org
Sent: Friday, April 26, 2013 5:25 AM
Subject: Re: [R] time series plot: x-axis problem

Hello,

Try the following.

(rr=ts(rr,start=c(2012,5),frequency=12))

plot(rr, xlab="2012 - 2013", ylab="event freq", xaxt = "n", col="blue")

labs <- format(as.Date(time(rr)), "%b-%Y")

axis(1, time(rr), labs,    cex.axis = .9, tcl = -.5, las = 2)

Hope this helps,

Em 25-04-2013 19:11, Jerry escreveu:
> Hi,
>
> I'm trying to plot a simple time series. I'm running into an issue with
> x-axis
>
> The codes below will produce a plot with correct x-axis showing from Jan to
> Dec
>
>> rr=c(3,2,4,5,4,5,3,3,6,2,4,2)
>
>> (rr=ts(rr,start=c(2012,1),frequency=12))
>
>> win.graph(width=6.5, height=2.5,pointsize=8)
>
>> plot(rr, xlab="2012", ylab="event freq", xaxt = "n", col="blue")
>
>> axis(1, time(rr), rep(substr(month.abb, 1, 3), length = length(rr)),
> cex.axis = .9, tcl = -.5, las = 2)
>
>
> However, if I change the start point from Jan 2012 to May 2012, which is
>
>> (rr=ts(rr,start=c(2012,5),frequency=12))
>
>
> Then run the codes below
>
>> plot(rr, xlab="2012 - 2013", ylab="event freq", xaxt = "n", col="blue")
>
>> axis(1, time(rr), rep(substr(month.abb, 1, 3), length = length(rr)),
> cex.axis = .9, tcl = -.5, las = 2)
>
>
> In the the new plot produced, x-axis is still showing from Jan to Dec, not
> from May to April as I desired.
>
> How to fix x-axis? Is it possible to fix it WITHOUT modifying the object
> "rr"? Also, ideally, I would like to have each time point on x-axis showing
> month/year, not just month. How to do that?
>
> Any help and input will be much appreciated!
>
> Thanks
> Jerry
>
>     [[alternative HTML version deleted]]
>
> ______________________________________________
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> https://stat.ethz.ch/mailman/listinfo/r-help
> and provide commented, minimal, self-contained, reproducible code.
>

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