You seem to be using Mata operators in Stata. That will not work. A
list legal operators in Stata can be found by typing -help operator-.
But before you start inventing your own functions, take a look at:
-help dates_and_times##extracting-
-- Maarten
--- Ashim Kapoor <[email protected]> wrote:
> Hello everyone,
>
> I am having trouble with the last line of the following code : -
>
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>
> gen week=1
> gen dow=dow(stdate)
>
> gen changeinweek=1 if dow< dow[_n-1]
>
> replace week=( changeinweek==. ) ? week[_n-1] : week[_n-1]+1
>
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>
> It says " invalid ? "
>
> Could someone please tell me what I am doing wrong ? In case someone
> needs details I am assigning weeks to my data.
>
> Thank you,
> Ashim.
> *
> * 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/
>
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room N515
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
*
* 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/
