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Re: st: Dichotomizing a Variable
There are probably more efficient/clever ways of doing this, but you
can generate a random number from a uniform distribution and use this
to randomly assign cases to either the 0 or 1 condition. Of course,
there is no guarantee that exactly half of the cases will be 0 an
dhalf 1, but at least they are randomly assigned this state. The
following example shows how this works using the auto data.
tabstat rep78, statistics(median)
set seed 040706
replace dichot=0 if rep78<3
replace dichot=1 if rep78>3 & rep78 <.
replace dichot=0 if rep78==3 & select <.5
replace dichot=1 if rep78==3 & select >.5
tab rep78 dichot
On 4/7/06, Reg Jordan <email@example.com> wrote:
> Suppose I have a variable, abc that consists of: 1 2 3 4 5 5 6 7 8 9. I want
> to dichotomize the variable at the median.
> generate abcnew = 0
> replace abcnew = 1 if abc > 5
> What statement do I write that assigns one of the 5s a 0 and the other 5 a 1
> in abcnew?
> Thanks for the assistance.
> * 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: