Dear Stephan,
there are two ways to do it:
1) write if first, then put a comma and all options
2) write a comma, all options, another comma and then if condition
E.g.:
sysuse auto
regress p w, noconst, if foreign
regress p w if foreign, noconst,
Regards,
Sergiy Radyakin
On 7/31/08, Stephan Rudolfer <[email protected]> wrote:
> I wish to use the if command to select a subset for estimation purposes, but also use options for the main command. This doesn't seem to work, since stata thinks that "if" is a further option. For example, pca..., comp(6). If I follow this with "if x==1", it won't work because stata thinks that "x==1" is a further option for pca.
>
> Comments please!
> Stephan Rudolfer
> --
> Dr Stephan M Rudolfer
> Honorary Research Fellow
> in Biostatistics & Mathematical Statistics
> Chairman, Manchester Group, Royal Statistical Society
> Biostatistics, Health Methodology Research Group
> School of Community Based Medicine
> University Place (1st Floor)
> University of Manchester
> Oxford Road, Manchester M13 9PL.
> Tel: +44 161 275 1650 Fax: +44 161 275 5205
> Email: [email protected]
> Web: http://www.maths.man.ac.uk/DeptWeb/Homepages/smr/
>
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
