Sounds like you are running Version 7, Paul. It requires that you
specifically declare the variable to be a string. Try
gen str6 oral="OVYS" if index(stk,"OVYS")
Tom
----- Original Message -----
From: "Paul O'Brien" <[email protected]>
To: <[email protected]>
Sent: Saturday, February 07, 2004 1:45 PM
Subject: Re: st: Extracting data from mixed string
> Thanks James. Tried but:
>
> . gen oral="OVYS" if index(stk,"OVYS")
> type mismatch
>
> Paul
>
>
> On 7 Feb 2004, at 17:21, James Hesford wrote:
>
> > If you don't have duplicate oral contraceptives in variable, stk, a
> > simple solution seems to be:
> >
> > gen oral = "OVYS" if index(stk,"OVYS")
> > replace oral = "MICROG" if index(stk, "MICROG")
> > replace oral ="FEMOD" if index(stk, "FEMOD")
> > replace oral = "LOGED" if index(stk, "LOGED")
> >
> > Items not have matches are blank, but you can replace this with BLANK
> > by making this your first command (i.e., gen oral = BLANK followed by
> > the series of replacements).
> >
> >> Database of 41,000 clinic visits with 26 variables for each visit.
> >> One variable is a string (stk) of contraceptives prescribed,
> >> containing 1 to 4 types, separated by commas.
> >>
> >> stk
> >> NONE,OVYS
> >> NONE,NONE,NONE,MATES6,NATURAL
> >> NONE,MICROG
> >> NONE,NONE
> >> NONE,FEMODE,NATURAL
> >> NONE,NONE
> >> LOGED
> >> NONE,NONE,MICROG,MATES6,NATURAL
> >> NONE
> >> NONE,LEVONEL,MICROG
> >> MICROG
> >> NONE,NONE,LOG
> >> NONE,NONE,NONE
> >> NONE,MATES6,NATURAL
> >> NONE,NONE
> >> MICROG,ULTRA
> >> NATURAL
> >> NONE,MICROG,NATURAL
> >>
> >> Some are oral contraceptives:OVYS MICROG FEMODE, LOGED
> >>
> >> The position of the oral contraceptives in the string varies.
> >>
> >> I want all the oral contraceptives in one column:
> >>
> >> OVYS
> >> blank
> >> MATES6
> >> MICROG
> >> blank
> >> FEMO
> >> blank
> >> LOGED
> >>
> >> How?
> >>
> >> Help gratefull received.
> >>
> >> Paul
> >>
> >> *
> >> * 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/
> >
> > *
> > * 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/
> >
> >
> Dr Paul O'Brien
> Westside Contraceptive Services
> Raymede Clinic, Exmoor St, London
> W10 6DZ
> 020 8962 4450 - tel
> 020 8962 4451 - fax
> 07900 495 118 - mob
>
> *
> * 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/
>
*
* 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/
