Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: RE: RE: Derivative of Kaplan-Meier curves


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: Derivative of Kaplan-Meier curves
Date   Mon, 16 Jun 2003 18:51:10 +0100

Indeed. I imagine that what the original questioner really meant 
was "after, or with, some kind of smoothing". 

Nick 
n.j.cox@durham.ac.uk 

> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of 
> FEIVESON, ALAN
> H. (AL) (JSC-SK) (NASA)
> Sent: 16 June 2003 18:43
> To: 'statalist@hsphsun2.harvard.edu'
> Cc: 'smurphy@perfuse.org'
> Subject: st: RE: Derivative of Kaplan-Meier curves 
> 
> 
> Kaplan-Meier "curves" are step functions. Thus their 
> derivatives are either
> zero (between observations) or undefined (at the observations).
> 
> Al Feiveson
> 
> -----Original Message-----
> From: Nick Cox [mailto:n.j.cox@durham.ac.uk]
> Sent: Monday, June 16, 2003 11:59 AM
> To: statalist@hsphsun2.harvard.edu
> Cc: smurphy@perfuse.org
> Subject: st: Derivative of Kaplan-Meier curves 
> 
> 
> Sabina A. Murphy [smurphy@perfuse.org] sent this
> to me. Please copy any answer to her.
> 
> Do you know if Stata can graph the first derivative of Kaplan Meier
> curves, and if so, how it is programmed? I have no problem creating
> the
> KM curves but have not been able to figure out how to graph the
> functions.
> 
> Nick
> n.j.cox@durham.ac.uk
> 

*
*   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/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index