R help - Aug 2009 - how to add data to some ts

Dear all,

Finally, I made it, my RPostgreSQL works. After working through some  
tutorials, i was able to plot, get and replace several timeseries.


Still I miss the opportunity (syntax) to add data. Most tutorials are  
about: "Download some S&P data from Yahoo and play around a
little".
What I want to do is, add data to an existing timeseries. Is there a  
possibility to add data ?

For example if I have something like

z <- ts(rnorm(10), start = c(1990, 1), frequency = 1)
seriesNames(z) <- "vec"

I want to add the next 10 years, like

z <- ts(rnorm(10), start = c(2000, 1), frequency = 1)
seriesNames(z) <- "vec"



If I use something TSreplace the new series starting at 2000 just  
replaces the existing one instead of just adding another. Is there any  
possibility to add data without reading the whole database into R ?



thx in advance

matt

P.S.: some basic TS manipulating manuals are highly appreciated, its  
just that i found the more sophisticated ones so far.
	[[alternative HTML version deleted]]

On Mon, Aug 31, 2009 at 6:09 AM, Bunny,
lautloscrew.com<bunny at lautloscrew.com> wrote:
> Dear all,
>
> Finally, I made it, my RPostgreSQL works. After working through some
> tutorials, i was able to plot, get and replace several timeseries.
>
>
> Still I miss the opportunity (syntax) to add data. Most tutorials are
> about: "Download some S&P data from Yahoo and play around a
little".
> What I want to do is, add data to an existing timeseries. Is there a
> possibility to add data ?
>
> For example if I have something like
>
> z <- ts(rnorm(10), start = c(1990, 1), frequency = 1)
> seriesNames(z) <- "vec"
>
> I want to add the next 10 years, like
>
> z <- ts(rnorm(10), start = c(2000, 1), frequency = 1)
> seriesNames(z) <- "vec"
>
>
>
> If I use something TSreplace the new series starting at 2000 just
> replaces the existing one instead of just adding another. Is there any
> possibility to add data without reading the whole database into R ?
>
>
>
> thx in advance
>
> matt
>
> P.S.: some basic TS manipulating manuals are highly appreciated, its
> just that i found the more sophisticated ones so far.
> ? ? ? ?[[alternative HTML version deleted]]
>
How about something like

rbind(
   OLD_Data,
   NEW_Data
)

As long as the data has the same number of columns (Yahoo data will,
or should) then something like this should work. I use it with data
from TradeStation but there I have total control of what goes into R.

If you are not 100% sure of non-overlapping data then you might want
to check for duplicates.

Hope this helps,
Mark