Am Donnerstag 14 August 2008 22:04:46 schrieb meik michalke: > hi, > > i've been planning this for a long time, now i have finally started working > on a plugin for data analysis unter the item response theory approach :-) > > i've implemented parameter estimation for dichotomous data last night, to > fit the rasch, two parameter logistic and birnbaum three parameter model. > the plugin relies on the ltm package: > o http://wiki.r-project.org/rwiki/doku.php?id=packages:cran:ltm > almost all options of the rasch(), ltm() and tpm() functions are available, > only the "parscale" control of tpm() and the two factor model of ltm() are > missing, as of now. > > my future plans are to develop additional dialogs for goodness-of-fit tests > and ltm specific plot options (e.g. test information curves). but of course > any suggestions are wellcome :-) >
Hello meik, thanks for the plugin. > here's the plugin: > o http://reaktanz.de/stuff/R/irt_plugin-0.01.tar.bz2 > and some screenshots: > o http://reaktanz.de/stuff/R/scrsht3_01_data_model.png > o http://reaktanz.de/stuff/R/scrsht3_02_options.png > o http://reaktanz.de/stuff/R/scrsht3_03_advanced_control.png > there's also a quick&dirty wizard, but i'm not sure if it's really > useful... > I think it will take some time until your plugin is reviewed, at least we have to wait for a final comment by Thomas. > since the plugin needs the ltm package, i've included a simple library(ltm) > call in the preprocess function. is there a better way to make sure it's > loaded, except doing it manually? > <? function preprocess () { ?> require (ltm) ... is commonly used in RKWard plug-ins. > > viele gruesse :: m.eik viele gruesse Stefan ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ RKWard-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/rkward-devel
