You can try
. centile d, centile(33)
. reg y a b c if d>r(c_1)
Best,
Jean-Benoit Hardouin
FUKUGAWA, N. a écrit :
Dear all,
Suppose we want to limit observations where one variable records a larger value
than its top quartile, we can write as follows.
sum d,detail
reg y a b c if d>r(p75)
However, this program allows only fixed thresholds such as 1, 10, and 75 percent.
How can I use other thresholds such as r(p33) in the program?
Or, is there any program to do the same?
Thanks in advance.
--
*********************************************
Jean-Benoit Hardouin
Biostatisticien
Observatoire Régional de la Santé du Centre
BP 2439
1, rue Porte Madeleine
45032 Orléans Cedex 1
tél : 02 38 74 48 80
fax : 02 38 74 48 81
Email : [email protected]
*********************************************
*
* 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/
