Thanks a lot, but something else may be awry ? - at least as.POSIXct(Dato) 
although now of length 84 still elicits a report of different argument 
lengths even though length now is 84 for both arguments.
 > identify(as.POSIXct(Dato),Crea,5,plot=TRUE)
Error in identify(x, y, as.character(labels), n, plot, offset) :
         different argument lengths
 > length(as.POSIXct(Dato))
[1] 84
 > length(Crea)
[1] 84
 > length(Dato)
[1] 9

Best wishes
Troels Ring
Aalborg

At 18:43 9/15/03, you wrote:
>You need to convert to POSIXct before using Dato in identify().
>This will work as you expected in R 1.8.0.
>
>On Mon, 15 Sep 2003, Troels Ring wrote:
>
> > Dear Friends, I'm using winXP and R 1.7.1 and plotting some data using
> > dates on the x-axis, and wanted to use identify to show some points but 
> was
> > told by identify that the x and y vectors producing a fine graph with 84
> > points were not equal in length. Below are the Dato for date - and
> > length(Dato) finds 9 but str finds 84 as known. Will identify not work in
> > this context ?
> > Best wishes
> > Troels Ring
> > Aalborg, Denmark
> >  > Dato
> >   [1] "2000-01-04" "2000-01-07" "2000-01-10" "2000-01-13" "2000-01-17"
> >   .......
> > [81] "2003-04-23" "2003-05-14" "2003-07-30" "2003-08-14"
> >  > length(Dato)
> > [1] 9
> >  > str(Dato)
> > `POSIXlt', format: chr [1:84] "2000-01-04" "2000-01-07" "2000-01-10"
> > "2000-01-13" ...
>
>--
>Brian D. Ripley,                  ripley@stats.ox.ac.uk
>Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
>University of Oxford,             Tel:  +44 1865 272861 (self)
>1 South Parks Road,                     +44 1865 272866 (PA)
>Oxford OX1 3TG, UK                Fax:  +44 1865 272595
>
>______________________________________________
>R-help@stat.math.ethz.ch mailing list
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