By Thomas Lumley. It fits stratified proportional hazards models with left
truncation and right censoring using either the Breslow or Efron approximations for tied
failures. Only very limited diagnostics and graphics are as yet available.
sapaclisp is a collection of Common Lisp functions that can be used
to carry out many of the computations described in the book
"Spectral Analysis for Physical Applications: Multitaper and
Conventional Univariate Techniques",
by Donald B. Percival and Andrew T. Walden,
Cambridge University Press, Cambridge, England, 1993