How to make a time series object from a data frame containing dates.
In particular,
library(zoo)
z <- zoo(x$alloc_gb, x$month)
plot(z)
See the three zoo vignettes
vignette(package = zoo) # to list them
vignette("zoo") # to show first one
and the help files
library(help = zoo)
?zoo
On Wed, Apr 22, 2009 at 1:07 PM, stephen sefick <ssefick at gmail.com> wrote:
look at the zoo package where there are quite a few functions to help with this. Stephen Sefick On Wed, Apr 22, 2009 at 11:09 AM, Lane, Jim <jim.lane at rbc.com> wrote:
Hi, All I have a data frame like this.
names(x)
[1] "month" ? ?"alloc_gb" One of the columns contains the dates I want to use:
data.class(x$month)
[1] "yearmon" I would like to make a time series object out of this. However the ts function seems to require me to spell out the starting date. Is there a way to tell ts to use the date column I already have? A naive version of the syntax I was expecting to find would have been something like: maketimeseries(values=x$alloc_gb,dates=x$month) Or am I seriously missing something somewhere? Jim Lane Capacity Planner RBC Financial Group 315 Front St W 6th Floor - H14 Toronto, Ontario CANADA M5V 3A4 416-348-6024 Display of superior knowledge is as great a vulgarity as display of superior wealth - greater indeed, inasmuch as knowledge should tend more definitely than wealth towards discretion and good manners. - H. W. Fowler, Modern English Usage
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