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st: Conditional operatior trouble


From   "Ashim Kapoor" <ashimkapoor@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Conditional operatior trouble
Date   Mon, 15 Sep 2008 12:08:06 +0530

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.
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