University of Minnesota, Twin Cities School of Statistics (Local) Rweb

Charlie Geyer's Personal Home Page

Official disclaimer required by the University WWW policy.

Woof! I just found out I also need a privacy statement and a link to the official university policy on that (even though nothing linked here is relevant to that stuff).

Also I must abide by the University Accessibility of Information Technology Policy, which I try to do, as well as I can. I'm all for accessibility. It's just that there aren't any great tools, and bobby which is good, complains about a lot of irrelevant stuff.

My worst accessibility offense is using plots in statistics (including over the web via Rweb). I don't know how to make them accessible. There's a good research area for anyone interested in statistical graphics. Apparently, this is already an area of some research interest, but we are a long way from an R device driver that outputs accessible statistical graphics (AFAIK).

Preprints, tech reports, conference proceedings.
- Likelihood Inference in Exponential Families and Directions of Recession (UMn TR 672)
- My Ph. Thesis University of Washington 1990.
- Radically Elementary Probability and Statistics (UMn TR 657)
- Aster Models Preprints for two papers that have now appeared, also numerous technical reports, web pages and overheads for a short course, overheads for several talks.
- Le Cam Made Simple: Asymptotics of Maximum Likelihood without the LLN or CLT or Sample Size Going to Infinity (UMn TR 643)
- Computing the Joint Range of a Set of Expectations (with Radu Lazar and Glen Meeden)
- A paper Markov chain Monte Carlo maximum likelihood from the 1991 Interface Proceedings that is hard to find (not on the web apparently) and has the first mention of what is now called parallel tempering in the MCMC community.
  - This PostScript version is the original form as it appeared in the Interface proceedings.
  - This PDF form is just the PostScript form run through ps2pdf without any attempt to use PDF-friendly fonts and may not look very good.
Software
- An R package trust to do trust region optimization. This is a general unconstrained optimization routine that competes with the R functions nlm and optim that come with the base distribution.
- An R package aster to do life history analysis for data on biological organisms. Aster models are in some respects either specializations or generalizations (both in different respects) of survival analysis, generalized linear models, and graphical models.
- An R package rcdd to do computational geometry, a (partial) interface to the functionality of the cddlib library written by Komei Fukuda.
- An R package bernor to do logit-normal GLMM.
- An R package mcmc to do Markov chain Monte Carlo.

A rant about Sweave.
- Why Reproducible Research is the Right Thing.

Fun rant.
- A review of Linux laptops from LinuxCertified. (I recently bought one and so did Elizabeth Thompson.)
- A letter about infamous Monte Hall problem.

Course Home Pages
- Stat 5101 fall semester 08.
- Stat 8054 spring semester 08.
- Stat 8931 spring semester 08.
- Stat 5601 fall semester 07.
- Stat 5102 spring semester 07.
- Stat 5101 fall semester 06.
- Stat 5601 fall semester 06.
- Stat 3011 spring semester 06.
- Stat 5601 (old) spring semester 06.
- Stat 8931 fall semester 05.
- Stat 8932 spring semester 04.
- Stat 5931 fall semester 03.
- Stat 5601 (older) fall semester 03.
- Stat 5102 spring semester 03.
- Stat 8701 spring semester 03.
- Stat 5101 (old) fall semester 02.
- Stat 5601 (oldest) fall semester 02.
- Stat 3011 (old) fall semester 01.
- Stat 5102 (old) spring semester 01.
- Stat 5101 (older) fall semester 00.
- Stat 3011 (older) fall semester 00.

Some rants about Markov chain Monte Carlo.
- Why One Long Run is the Right Thing.
- Why Burn-In is pointless.
- On the Bogosity of MCMC Diagnostics.

Some other rants.
- How to Analyze the Lottery.
- How to Interpret Polls.
- A Playoff Probability Calculator that does a tree diagram calculation for playoff series.

My vita. It has links to papers available on-line.

My official departmental home page
University of Minnesota School of Statistics Home Page and places to surf
University of Minnesota Department of Ecology, Evolution and Behavior
University of Minnesota Program in the History of Science & Technology
University of Minnesota Division of Biostatistics
University of Minnesota Twin Cities Campus Home Page
University of Washington Department of Statistics

Some fooling around with Java applets.