Maybe one of these are close enough:
xts(c(2, 4, 5), yearqtr(1991:1993))
as.xts(ts(c(2, 4, 5), 1991))
of if you want only a plain year as the index then then use zoo,
zooreg or ts class:
library(zoo)
zoo(c(2, 4, 5), 1991:1993)
zooreg(c(2, 4, 5), 1991)
ts(c(2, 4, 5), 1991)
On Fri, Oct 6, 2017 at 2:56 AM, John <miao...@gmail.com> wrote:
> Hi,
>
> I'd like to make a time series at an annual frequency.
>
>> a<-xts(x=c(2,4,5), order.by=c("1991","1992","1993"))
> Error in xts(x = c(2, 4, 5), order.by = c("1991", "1992", "1993")) :
> order.by requires an appropriate time-based object
>> a<-xts(x=c(2,4,5), order.by=1991:1993)
> Error in xts(x = c(2, 4, 5), order.by = 1991:1993) :
> order.by requires an appropriate time-based object
>
> How should I do it? I know that to do for quarterly or monthly time
> series, we use as.yearqtr or as.yearmon. What about annual?
>
> Thanks,
>
> John
>
> [[alternative HTML version deleted]]
>
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