The fifth public release of my survival code, "survival5", is now available
on the Biostatistics web site
http://www.mayo.edu/hsr/biostat.html
in the software section. Some useful documentation is also found in my
own page under the Lead statistician section.
There are dozens of changes with respect to "survival4". Most of these
have already been incorporated into Splus; for these the release acts as
the ultimate documentation, i.e., source code. Major changes that are not
yet part of the Splus release are
- penalized Cox models. These include smoothing splines, frailty
(random effects) and ridge regression as special cases. User written
penalty functions are supported, so many more possibilities exist.
- major rewrite of the parametric survival function survreg(). This
allows for penalized models (same extensions as coxph), user specified
distributions, a larger number of residuals and predicted values options,
and numerical improvements. The latter finally removes the "singular"
errors that people have complained of, justifiably, for several years.
- updated rate tables, including 1990 US data
- more plotting options for survival curves. Along with the use of
subscripting, e.g. fit <- survfit(...); plot(fit[1:2],...); lines(fit[3],...)
this much improves the flexibility.
This is source code. Adding it locally is easy under Unix, more
work under Windows. Brian Ripley has a binary copy for S-PLUS 3.x and
4.x for Windows at http://www.stats.ox.ac.uk/pub/SWin/surv5.zip which
is mirrored on Statlib; he had already given significant input on the
packaging, i.e., missing routines and flawed instructions present in
my first attempt. Propogation of the source and binaries to Statlib
will occur apace.
I'll be out of town some of next week, when I get back I'll fix any
problems with the distribution (confusing instructions, etc), but don't
expect to update the posted files after that.
Terry T.
Terry M. Therneau, Ph.D. (507) 284-3694
Head, Section of Biostatistics (507) 284-9542 FAX
Mayo Clinic therneau.terry@mayo.edu
Rochester, Minn 55905
-----------------------------------------------------------------------
This message was distributed by s-news@wubios.wustl.edu. To unsubscribe
send e-mail to s-news-request@wubios.wustl.edu with the BODY of the
message: unsubscribe s-news
|