Martin Elff's Blog

Essex Summer School Course "Data Analysis and Programming with R"

Posted on Tue, 15 May 2012 18:36:39 +0100

I should of course also mention that there is an Essex Summer School Course that I will be teaching: 3L: Data Analysis and Programming with R, which will take place August 6-17.

Tags: teaching, essex summer school

Mathematical Tools for Social Scientists

Posted on Tue, 15 May 2012 18:23:23 +0100

September 17–21 this year I will be teaching a course on "Mathematical Tools for Social Scientists" at GESIS, Cologne.

Register as long as there are places available :)

Tags: teaching

New article about electoral volatility in the Netherlands in Acta Politica

Posted on Tue, 3 Apr 2012 16:38:55 +0100

An article about "Bounded volatility in the Dutch electoral battlefield: A panel study on the structure of changing vote intentions in the Netherlands during 2006–2010" is now available for advance access from the journal Acta Politica (if you/your library have a journal subscription).

Tags: netherlands,volatility

New paper about "A Spatial Model of Coded Political Texts" available online.

Posted on Tue, 3 Apr 2012 14:11:09 +0100

I have uploded a paper I am presenting at panel 38-4 "Placing Actors in the Policy Space" of the Annual Conference of the Midwest Political Science Association (MPSA), 12-15 April in Chicago. The paper is available at the Conference Website here.

Tags: positions

Version 0.95-38 of R package "memisc" released

Posted on Tue, 14 Feb 2012 16:43:08 +0000

A new patchlevel of my memisc package is available on this website and hopefully soon on CRAN.

The following changes were made since the last patchlevel:

2012-02-14:

  • Replaced calls to .Internal(sample()) by calls to sample.int() and eliminated call to .Internal(int.unzip()). The package now depends on R >= 2.9.0

2012-01-25:

  • Fixed reading of value labels from SPSS system files - no garbage at the end of the labels.

2011-12-07:

  • Fixed "getSummary" and "getSummary.expcoef" S3-generic functions.

Tags: memisc

Version 0.2-3 of R package "mclogit" released

Posted on Wed, 7 Dec 2011 16:17:48 +0000

I just wrapped up version 0.2-3 of my mclogit package, which corrects some issues with the standard errors. It should soon appear on CRAN. For the time being there is a version available from this website.

Tags: mclogit

Version 0.95-35 of R package "memisc" released

Posted on Sun, 6 Nov 2011 17:55:49 +0000

A new patchlevel of my memisc package is available on this website and hopefully soon on CRAN.

The following changes were made since the last patchlevel:

2011-11-06:

  • Added a 'rep' method for 'item.vector' objects.
  • Applied patch sent by Masahiro Hayashi to fix bugs in 'vector' method of 'recode'.

Tags: memisc

Version 0.95-34 of R package "memisc" released

Posted on Wed, 5 Oct 2011 19:14:28 +0100

A new patchlevel of my memisc package is available on this website and hopefully soon on CRAN.

The following changes were made since the last patchlevel:

2011-10-05:

  • Adapted the package to R 2.14.0 (by eliminating calls to 'require' in the '.onLoad' function)
  • Changed the methods for data frames, 'data.set' and 'importer' objects of the function 'sort' from S3 to S4

2011-08-26:

  • Fixed a bug in internal function 'compress.storage.mode.double' that caused it to create NA's where it should not.
  • Fixed a bug in the print method for items that caused it to report their ...
(read more)

Tags: memisc

Version 0.95-33 of package "memisc" released

Posted on Fri, 17 Jun 2011 18:54:57 +0100

A new patchlevel of my memisc package is available on this website and hopefully soon on CRAN.

The following changes were made since the last patchlevel:

2011-06-17:

  • Removed mkHelpDir() that has not worked for a while because of architectural changes in R.
  • Removed some unused variables from the C-code that caused warnings.
  • Corrected a bug in format.mtable() misusing the function character() and some other buglets reported by NOTE's in automatic runs by CRAN.

2011-05-29:

  • Applied patch sent by Christopher N. Lawrence: Added support to mtable() for clm and clmm ordinal models in the ordinal package. Updates getSummary to ...
(read more)

Tags: memisc

Version 0.95-32 of R package "memisc" released

Posted on Sat, 14 May 2011 22:00:47 +0100

A new patchlevel of my memisc package is available on this website and hopefully soon on CRAN.

The following changes were made since the last patchlevel:

2011-05-14:

  • Fixed problems with SPSS system files that do not contain an 'info_flt64' record. This problem led to zeroes in the data section of the file being erroneously interpreted as sysmis.
  • Fixed 'show' and 'print' methods for 'data.set' objects - they no do fit the width set by options(width=...), without ugly line breaks.
  • Changed the default value of the 'compress.storage.modes' option for the subset and bracket methods o 'importer' objects to ...
(read more)

Tags: memisc

Package "memisc": Sandwich estimators and 'mtable'

Posted on Fri, 13 May 2011 21:46:19 +0100

Recently I was asked whether it was possible to use with 'mtable' sandwich estimators of variance for lm and glm models, as they are provided by the R packages 'sandwich' and 'lmtest'.

An R script that provides this extension can now be downloaded from here.

(read more)

Tags: memisc

Extensions for 'mtable' in R package "memisc"

Posted on Tue, 10 May 2011 12:28:38 +0100

Jason Morgan has posted some extensions to the 'mtable' function on his blog. It provides extended support for survival models and linear mixed models.

Tags: memisc

RZ - a GUI for Data Management with memisc

Posted on Tue, 10 May 2011 12:13:40 +0100

Masahiro Hayashi has written a graphical user interface for the data management facilities that my package 'memisc' provides.

This package can be found here. It looks promising but seems to lack documentation. I am going to check it out more intensively in the next weeks.

For a start, here is a screenshot.

Tags: memisc

memisc 0.95-31

Posted on Fri, 16 Jul 2010 18:55:05 +0100

A new patchlevel of my memisc package is available on this website.

The following changes were made since the last patchlevel:

2010-07-16:

  • fixed a bug in 'Simulate' that caused it to fail in certain situations in R version >= 2.11.

Tags: memisc

memisc 0.95-30

Posted on Mon, 12 Apr 2010 21:42:18 +0100

A new patchlevel (0.95-30) of my memisc package is on CRAN now.

The following changes were made since the last patchlevel:

2010-04-12:

  • 'toLatex(mtable(),useDcolumn=FALSE)' should now produce useable LaTeX output (dollars are added to the table entries).

2010-04-09:

  • 'By' works now with 'genTable' and 'aggregate.formula'. It gains a 'data.frame' method, which better cooperates with calls to 'lm'-like functions. Their results get a 'data' component containing the subset of the data frame that was given as 'data' argument to the call of 'By'.

Tags: memisc

memisc 0.95-29

Posted on Thu, 8 Apr 2010 11:40:13 +0100

A new patchlevel (0.95-29) of my memisc package is on CRAN now.

The following changes were made since the last patchlevel:

2010-04-08:

  • fixed bug in 'cases'. It works now with target expressions even with 'within'.
  • 'write.mtable' now handles a 'forLaTeX=TRUE' option in a more convenient way.
  • 'mtable' now handles objects of classes "polr" and "simex", thanks to a contribution from Christopher N. Lawrence (Texas A&M International University)
  • support for 'mtable' output for "glm" objects with exponentiated coefficients and prelininary support for "lmer" object added, thanks to a contribution from Dave Atkins (Unversity of Washington). Also the ...
(read more)

Tags: memisc

Updates of munfold and mclogit

Posted on Wed, 7 Apr 2010 21:28:34 +0100

I just uploaded updates of my packages munfold and mclogit onto my website. The updates have now a more complete documentation so that they pass R CMD check. These updates have also been uploaded to CRAN where I hope they will soon be made publicly available.

Tags: munfold, mclogit

memisc 0.95-27

Posted on Sat, 20 Mar 2010 19:14:33 +0000

A new patchlevel (0.95-27) of my memisc package is on CRAN now.

The following changes were made since the last patchlevel:

2010-03-18:

  • patch to trimws to make it locale-neutral

Tags: memisc

memisc update

Posted on Fri, 12 Mar 2010 17:28:59 +0000

A new patchlevel (0.95-26) of my memisc package is on CRAN now.

The following changes were made since the last patchlevel:

2010-03-11:

  • fixed bugs in mtable and format.mtable. Short 'summary.stats' arguments or 'summary.stats=FALSE' should work now.

2010-03-06:

  • fixed bug in genTable/percentage: total counts disappeared if a factor level had the same name as the name given to the total count
  • changed the default value of the 'digits' option of the matrix method of the toLatex generic to the more sensible getOption("digits")
  • the matrix method of the toLatex generic gains new optional arguments 'show ...
(read more)

Tags: memisc

Nice manual for LaTeX

Posted on Mon, 1 Mar 2010 14:45:54 +0000

Just found a nice reference for LaTeX: http://latex.computersci.org/Reference/Reference

R software uploads

Posted on Thu, 18 Feb 2010 22:20:02 +0000

Just finished the pages for some of my R packages (there's more to come). Packages memisc, munfold, and mcogit can now be found on my website.

Tags: memisc, munfold, mclogit