Indeed. I imagine that what the original questioner really meant
was "after, or with, some kind of smoothing".
Nick
[email protected]
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of
> FEIVESON, ALAN
> H. (AL) (JSC-SK) (NASA)
> Sent: 16 June 2003 18:43
> To: '[email protected]'
> Cc: '[email protected]'
> 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:[email protected]]
> Sent: Monday, June 16, 2003 11:59 AM
> To: [email protected]
> Cc: [email protected]
> Subject: st: Derivative of Kaplan-Meier curves
>
>
> Sabina A. Murphy [[email protected]] 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
> [email protected]
>
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