st: creating lag variable

["sarah smith" <sarah22209@hotmail.com>]

Dear Stata users;

I am trying to create a lag variable

y(t) = x(t-1)

I searched for a lag function but could not find. Any suggestions?
Thanks,
Sarah

> From: Roger Newson <roger.newson@kcl.ac.uk>
> Reply-To: statalist@hsphsun2.harvard.edu
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: Tempvars with ylabel
> Date: Tue, 08 Jun 2004 20:32:54 +0100
>
> At 19:35 08/06/2004, Doug A. Simmons wrote:
> > Is it possible to use tempvars (or some other Stata variable) to specify
> > values with the -ylabel- command? I have tried
> > -tempvar Mean-
> > -ylabel(`Mean', axis(2))-
> > but it gives me the error
> > "invalid label specifier, :  __000000:".
> >
> > It appears to be evaluating to the macro name, but not the stored
> > value. I have tried using compound quotes, but get similar results.
> >
> > I am attempting to build a .do file that will automate the graphing of
> > data that varies such that `Mean' could be different at each run of the
> > file. I use -graph twoway line `Mean'- to generate a reference line on
> > my graph and it works as expected. It just doesn't seem quite right to
> > me that I can use the temporary variable to draw the graph, but not to
> > label it.
> >
> > Thank you for your assistance.
> Doug might like to use my -regaxis- package, downloadable from SSC, which 
> inputs one or more variables and/or values which must be in the axis range 
> and creates a set of axis labels as output in a macro. The package contains 
> 2 programs, -regaxis- for regular linear axes and -logaxis- for regular 
> logarithmic axes. In Stata, type
>
> ssc describe regaxis
>
> to find out more.
>
> I hope this helps.
>
> Roger
>
>
> --
> Roger Newson
> Lecturer in Medical Statistics
> Department of Public Health Sciences
> King's College London
> 5th Floor, Capital House
> 42 Weston Street
> London SE1 3QD
> United Kingdom
>
> Tel: 020 7848 6648 International +44 20 7848 6648
> Fax: 020 7848 6620 International +44 20 7848 6620
>   or 020 7848 6605 International +44 20 7848 6605
> Email: roger.newson@kcl.ac.uk
> Website: http://www.kcl-phs.org.uk/rogernewson
>
> Opinions expressed are those of the author, not the institution.
>
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