survival: fitting equation to survival curve?
On Wed, Oct 26, 2011 at 2:37 PM, Lancaster, Robert (Orbitz)
<ROBERT.LANCASTER at orbitz.com> wrote:
I was able to resolve my issue. ?I assumed my survival rates followed an exponential, so took the log of them and fit the resulting values to a linear model. Would survreg allow me skip this step? ?I'm a newbie to the survival package so am not very familiar with its capabilities.
Yep, see ?survreg particularly the 'dist' argument and the examples section showing how to fit a model assuming an exponential distribution. HTH, Josh
-----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Lancaster, Robert (Orbitz) Sent: Wednesday, October 26, 2011 1:40 PM To: r-help at r-project.org Subject: [R] survival: fitting equation to survival curve? Given a survfit object, is it possible to fit an equation to the resulting survival curve? ?Is this possible? ?What about with a coxph or survreg object? TIA, Rob ? ? ? ?[[alternative HTML version deleted]]
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Joshua Wiley Ph.D. Student, Health Psychology Programmer Analyst II, ATS Statistical Consulting Group University of California, Los Angeles https://joshuawiley.com/