Statalist The Stata Listserver

[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: -generate- and run time contingencies

From   Nick Winter <>
Subject   Re: st: -generate- and run time contingencies
Date   Mon, 30 Jan 2006 11:34:48 -0500

Nick Cox had a slightly shorter version, eliminating the creation of the OK variable.

I am reminded again that it would be nice if the -replace- command somehow left behind the number of changes it makes (which it displays, but does not leave for a program to pick up.) It's been discussed before on statalist I think, and making -replace- r-class would likely break all kinds of programs, but still it would be handy to be able to get to that somehow....

-Nick Winter

At 11:26 AM 1/30/2006, you wrote:

At 11:09 AM 1/30/2006, n j cox wrote:
// not tested
gen x = uniform()
gen byte OK = x >= 0.8
capture assert OK == 1

while _rc {
        replace x = cond(x < 0.8, uniform(), x)
        replace OK = x >= 0.8
        capture assert OK == 1
I think you've got a winner. I tried it with a 1,000 cases and then 100,000, and it went pretty quickly. Then, I tried it with 10,000,000 cases - it took a few minutes but it finally got it done.

Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
FAX: (574)288-4373
HOME: (574)289-5227
EMAIL: Richard.A.Williams.5@ND.Edu
WWW (personal):
WWW (department):
* For searches and help try:
Nicholas J. G. Winter 607.255.8819 t
Assistant Professor 607.255.4530 f
Department of Government e
Cornell University w
308 White Hall
Ithaca, NY 14853-4601

* For searches and help try:

© Copyright 1996–2017 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index