version 0.2

cran · Jul 22, 2016 · 29e0433 · 29e0433
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diff --git a/DESCRIPTION b/DESCRIPTION
@@ -2,15 +2,15 @@ Package: DIFboost
 Type: Package
 Title: Detection of Differential Item Functioning (DIF) in Rasch Models
         by Boosting Techniques
-Version: 0.1
-Date: 2015-08-19
+Version: 0.2
+Date: 2016-07-21
 Imports: mboost, penalized, stabs
 Author: Gunther Schauberger
 Maintainer: Gunther Schauberger <gunther@stat.uni-muenchen.de>
 Description: Performs detection of Differential Item Functioning using the method DIFboost as proposed in Schauberger and Tutz (2015): Detection of Differential item functioning in Rasch models by boosting techniques, British Journal of Mathematical and Statistical Psychology. 
 License: GPL-2
 LazyLoad: yes
+Packaged: 2016-07-21 14:38:13 UTC; schaubergerg
 NeedsCompilation: no
-Packaged: 2015-08-19 15:26:20 UTC; schaubergerg
 Repository: CRAN
-Date/Publication: 2015-08-19 17:38:58
+Date/Publication: 2016-07-22 14:58:37
diff --git a/MD5 b/MD5
@@ -1,10 +1,10 @@
-844b4efd765fe9cb4d7dc58e460f99ae *DESCRIPTION
+b025c0b1346e9b20ef025fb54a8f6b1f *DESCRIPTION
 a9b970ebac4afc6216517192b8196c11 *NAMESPACE
 a4d9d26d5c8c274393fa730a21d2d06f *R/DIFboost-internal.R
-847f657bf4b9ebcf0312dd05255a5a63 *R/DIFboost.R
+c5731cc9068a65a7dec716044bf25f61 *R/DIFboost.R
 842fba54f82f8b40877d82bea5a981bb *R/print.DIFboost.R
-2ff80e279410c1239785c28977f8d481 *data/simul.data.rda
-210974d2e7f7c9e3da8240599cbdd67d *man/DIFboost-package.Rd
-602fdc04a576fe8780a4fb076e5ba80e *man/DIFboost.Rd
-43c4a9005398352539e00b574d015e57 *man/print.DIFboost.Rd
-1cf11066dcb645e048c14076b9bc84c9 *man/simul.data.Rd
+6f86099ec98501b1cf6942a7027adb95 *data/simul.data.rda
+3b8b3451311fd747ba46b8397d2576c4 *man/DIFboost-package.Rd
+618a16e3f79a0f9b3f02c777271d5cee *man/DIFboost.Rd
+7312e97c37ebdd72799cd9064202bef5 *man/print.DIFboost.Rd
+4ba7f97549ec926dc9e550f953ad9519 *man/simul.data.Rd
diff --git a/NAMESPACE b/NAMESPACE
diff --git a/R/DIFboost-internal.R b/R/DIFboost-internal.R
diff --git a/R/DIFboost.R b/R/DIFboost.R
@@ -119,7 +119,7 @@ smp<-  sample(1:P,floor(P/2))
 # perform stability selection
 m2 <- stabsel(m1,q=q ,cutoff=cutoff, folds = folds, mc.cores=mc.cores)
 
-# extract selected base learners/items
+# extract selected base learners/items  
 selected <- as.numeric(which(apply(m2$phat,1,max)>cutoff))
 
 # extract selected columns from design matrix
@@ -150,7 +150,8 @@ form2 <- as.formula(paste("~ ",paste("V",1:ncol(design.matrix),sep="",collapse="
 m3 <- penalized(response=XP,unpenalized=form1,penalized=form2,lambda1=0,lambda2=0.0001,data=refit.data,model="logistic")
 
 # extract relevant estimates
-coefs <- coef(m3)
+#coefs <- coef(m3)
+coefs <- m3@penalized
 
 theta.hat <- head(coefs,P)
 beta.hat <- coefs[(P+1):(P + I - 1)]

diff --git a/R/print.DIFboost.R b/R/print.DIFboost.R
diff --git a/data/simul.data.rda b/data/simul.data.rda
diff --git a/man/DIFboost-package.Rd b/man/DIFboost-package.Rd
@@ -16,7 +16,7 @@ Gunther Schauberger\cr
 \url{http://www.statistik.lmu.de/~schauberger/}
 }
 \references{
-Schauberger, Gunther and Tutz, Gerhard (2015): \emph{Detection of Differential Item Functioning in Rasch Models by Boosting Techniques}, British Journal of Mathematical and Statistical Psychology, published online
+Schauberger, Gunther and Tutz, Gerhard (2016): \emph{Detection of Differential Item Functioning in Rasch Models by Boosting Techniques}, British Journal of Mathematical and Statistical Psychology, 69(1), 80 - 103
 }
 \seealso{
 \code{\link{DIFboost}}, \code{\link{print.DIFboost}}

diff --git a/man/DIFboost.Rd b/man/DIFboost.Rd
@@ -62,7 +62,7 @@ The method assumes the DIFmodel from Tutz and Schauberger (2015) where boosting
 \item{cutoff}{cutoff value used for stability selection}
 }
 \references{
-Schauberger, Gunther and Tutz, Gerhard (2015): \emph{Detection of Differential Item Functioning in Rasch Models by Boosting Techniques}, British Journal of Mathematical and Statistical Psychology, published online
+Schauberger, Gunther and Tutz, Gerhard (2016): \emph{Detection of Differential Item Functioning in Rasch Models by Boosting Techniques}, British Journal of Mathematical and Statistical Psychology, 69(1), 80 - 103
 }
 \author{
 Gunther Schauberger\cr

diff --git a/man/print.DIFboost.Rd b/man/print.DIFboost.Rd
@@ -20,7 +20,7 @@ Further arguments to be passed to the \code{\link[base:print]{print}} function.
 }
 
 \references{
-Schauberger, Gunther and Tutz, Gerhard (2015): \emph{Detection of Differential Item Functioning in Rasch Models by Boosting Techniques}, British Journal of Mathematical and Statistical Psychology, published online
+Schauberger, Gunther and Tutz, Gerhard (2016): \emph{Detection of Differential Item Functioning in Rasch Models by Boosting Techniques}, British Journal of Mathematical and Statistical Psychology, 69(1), 80 - 103
 }
 \author{
 Gunther Schauberger\cr

diff --git a/man/simul.data.Rd b/man/simul.data.Rd
@@ -25,7 +25,7 @@ Simulated data set with 100 persons, 10 items and 3 (standardized) covariates. I
   }
 }
 \references{
-Schauberger, Gunther and Tutz, Gerhard (2015): \emph{Detection of Differential Item Functioning in Rasch Models by Boosting Techniques}, British Journal of Mathematical and Statistical Psychology, published online
+Schauberger, Gunther and Tutz, Gerhard (2016): \emph{Detection of Differential Item Functioning in Rasch Models by Boosting Techniques}, British Journal of Mathematical and Statistical Psychology, 69(1), 80 - 103
 }
 \author{
 Gunther Schauberger\cr