On 11/17/2016 06:00 AM, r-help-requ...@r-project.org wrote:
Hi,
As I sit and learn how to work with time series, I've run into a problem
that is eluding a quick easy answer (and googling for answers seems to
really slow the process...)
Question #1--
In a simple example on R 3.3.1 (sorry my employer hasn't upgraded to 3.3.2
yet):
x=rnorm(26,0,1)
x.ts<-ts(x,start=c(2014,9),frequency=12)
inputting x.ts at the prompt gives me a table with the rooms denoted by
year and columns denoted by months and everything lines up wonderfully.
Now my problem comes when I type at the prompt
plot(x.ts) or
plot(x.ts, xlab="") or
plot.ts(x.ts,xlab="")
I get a plot of the values, but my x-axis labels are 2015.0, 2015.5,
2016.0, and 2016.5 . January 2015 is coming out as 2015.0...
Is there a way of getting a more intelligible x-axis labeling? Even 2015.1
for Janaury, etc. would work, or even getting an index (either Septemebr
2014 representing 0 or 1 and it incrementally increasing each month).
There are several ways to do this. Having some bias, I would do
require(tfplot)
tfplot(x.ts)
Question #2--
If I have a time series of decadal events, how best should I set the
frequency. It is historical data, in the form of say AD 610-619 5 events,
AD 620-629 7 events, etc.
For anything other than annual, quarterly, and monthly data you probably
should consider zoo. (There are other options, but I think zoo is the
most widely used for some time now.) Guessing a bit how you think of
this data, I would say you want the date index to be the first year of
the decade. To illustrate, I can generate a hundred decades of random
data and index it thus:
require(zoo)
x <- zoo(round(10 * runif(100)) , order.by= 10 * 61:160)
Paul
Sorry for such a basic questions. Any advice would be appreciated.
Thanks in advance, MEH
Mark E. Hall, PhD
Assistant Field Manager
Black Rock Field Office
Winnemucca District Office
775-623-1529.
______________________________________________
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.
