R help - Jan 2005 - Help about time series

Hello,

When I create a ts object, I would like to get a particular value of this
time serie according to the date and not the rank. 
However, it seems necessary to use the rank as if it were a simple vector.
I would be very grateful if you could help out of this.
I thank you in advance,

Nicolas Ferrari

?time

dat <- ts(rnorm(10), start = c(1900), frequency = 1)
dat[time(dat) == 1905]

HTH, Andy
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Ferrari Nicolas
> Sent: Monday, January 31, 2005 2:26 PM
> To: 'R-help at lists.R-project.org'
> Subject: [R] Help about time series
>
>
> Hello,
>
> When I create a ts object, I would like to get a particular value of this
> time serie according to the date and not the rank.
> However, it seems necessary to use the rank as if it were a simple vector.
> I would be very grateful if you could help out of this.
> I thank you in advance,
>
> Nicolas Ferrari
>
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>

Ferrari Nicolas <nicolas.ferrari <at> insee.fr> writes:

: 
: Hello,
: 
: When I create a ts object, I would like to get a particular value of this
: time serie according to the date and not the rank. 
: However, it seems necessary to use the rank as if it were a simple vector.


Try this:

oneval <- function(series, date) as.vector(window(series, date, date))

# test
ser <- ts(21:25, 101)
oneval(ser, 102)