Squared Extrapolation Methods for Accelerating EM-Like Monotone Algorithms

Algorithms for accelerating the convergence of slow, monotone sequences from smooth, contraction mapping such as the EM algorithm. It can be used to accelerate any smooth, linearly convergent acceleration scheme. A tutorial style introduction to this package is available in a vignette on the CRAN download page or, when the package is loaded in an R session, with vignette("SQUAREM").


News

Log of changes to SQUAREM

o first release: August 8, 2010

o second release: August 9, 2010 - fixed a bug in cyclem1' andcyclem2' that croped up when testing under Windows 64-bit. This was due to QR-decomposition using LAPACK.

o third release: September 26, 2010 - modified the `cat' statement such that it is effective only when trace = TRUE

o fourth release: December 31, 2010 - There was a bug in the check for convergence in all the 4 functions: squarem1, squarem2, cyclem1 and cyclem2. It was pointed out by Roger Koenker. It is now fixed. - A slight change was made to documentation regarding the objective function.

o Fifth release: August 10, 2016 - created vignettes with several examples showing how to accelerate convergence using SQUAREM - created demo examples showing how to use SQUAREM to accelerate convergence

o October 19, 2016 - return intermediate parameter vector and merit function values

Reference manual

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install.packages("SQUAREM")

2017.10-1 by Ravi Varadhan, 4 months ago


http://www.jhsph.edu/agingandhealth/People/Faculty_personal_pages/Varadhan.html


Browse source code at https://github.com/cran/SQUAREM


Authors: Ravi Varadhan


Documentation:   PDF Manual  


GPL (>= 2) license


Suggests setRNG


Imported by ashr, lava, reReg, spef, tranSurv.

Depended on by GNE.


See at CRAN