Thanks Paul.
I thought about using some arbitrarily large number earlier. But I
recently came across an example, in which case the specified value is
indeed that large..So, I was wondering if there is any better
alternative.
Le
On Tue, Apr 1, 2008 at 12:12 AM, Paul Millar <[email protected]> wrote:
> How about something like:
>
> program define example,rclass
> syntax varlist(max=2) [if] [in] [, option1(real -999)]
>
> gettoken y 0: 0
> gettoken x 0: 0
>
> if `option1' == -999 {
>
> local option1=sum(y)/sum(x)
> }
>
>
>
> At 12:01 AM 01/04/2008, you wrote:
> >Hi there,
> >
> >Thanks in advance for your time.
> >
> >I am programming a ado file which needs to calculate a sample-specific
> >default value (according to some formulae), when the user does not
> >specify the option. I am not quite sure how I should use the -syntax-
> >to do this because -syntax- requires a fixed default value.
> >
> >For example, - example - won't work.
> >
> >program define example,rclass
> > syntax varlist(max=2) [if] [in] [, option1(real)]
> > gettoken y 0: 0
> > gettoken x 0: 0
> >
> > if "`option1'" == ""{
> > local option1=sum(y)/sum(x)
> > }
> >end
> >
> >But how can I get around with this? Thank you very much.
> >
> >Le
> >--
> >~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >Le Wang, Ph.D.
> >Minnesota Population Center
> >University of Minnesota
> >(o) 612-624-5818
> >*
> >* For searches and help try:
> >* http://www.stata.com/support/faqs/res/findit.html
> >* http://www.stata.com/support/statalist/faq
> >* http://www.ats.ucla.edu/stat/stata/
>
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Le Wang, Ph.D.
Minnesota Population Center
University of Minnesota
(o) 612-624-5818
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
