Ahh thank you. I figures out from the date / time functions.
Thanks Maarten,
Ashim.
On Mon, Sep 15, 2008 at 12:23 PM, Maarten buis <[email protected]> wrote:
> 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/
>
*
* 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/
