Indeed ... pk used to be p (instead of 1) and k (instead of o).
PROBLEM SOLVED!
Thank you very much!
Soren
On Sunday 04 July 2004 22:00, Nick Cox wrote:
> One or both of these variables is
> probably a string variable. Check out -destring-.
>
> Nick
> [email protected]
>
> S�ren O'Neill
>
> > A newbie problem perhaps, but my data looks like this:
> >
> > pk pixels
> > -------------
> > 0 100
> > 0 120
> > 0 110
> > 1 210
> > 1 230
> > 1 205
> >
> > etc ... you get the idea...
> >
> > running :
> > ranksum pixels, by (pk)
> >
> > returns:
> > no observations
> > r(2000);
> >
> > However, if (instead of my own data) I use the dataset from
> > http://www.stata-press.com/data/r8/fuel2 (as described in the
> > [R] S-Z p. 63,
> > there is no problem at all ...
>
> *
> * 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/
--
S�ren O'Neill, kiropraktor
[email protected]
tel. 6362 1906
*
* 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/
