Publications by Robert Vidigal, PhD
Introduction to R for Social Scientists
rm(list=ls()) Today: Coding skills for social scientists Research & Data organization R-architecture R exists as a base package with a reasonable amount of functionality. Data analysis and graphs The beauty of R: free, versatile, and expandable with packages with canned functions (pre-built implementations of various models). Any user can write ...
1560 sym R (5200 sym/18 pcs) 2 img
Weighted Networks
Creating Weighted Edgelists EDGES edges_<-list(NULL) for (i in 1:length(subsetsLIST)) { edges1 <- data.frame(from = c(subsetsLIST[[i]]$c1.1, subsetsLIST[[i]]$c1.1, subsetsLIST[[i]]$c1.1), to = c(subsetsLIST[[i]]$c2.1, subsetsLIST[[i]]$c2.2, subsetsLIST[[i]]$c2.3)) edges2 <- data.frame(from = c(subsetsLIST[[i]]$c1.2, sub...
163 sym Python (8552 sym/6 pcs)
Introduction to IRT
rm(list=ls()); gc(full=T); objects() set.seed(10012) Creating an Index of the Variables used gmo$polknowTF<-(gmo$pk_medmarij+gmo$pk_nafta+gmo$pk_parisagree+ gmo$pk_guantanamo+gmo$pk_gdpgrow+gmo$pk_deficit2018) table(gmo$polknowTF) gmo$polknowMC<-(gmo$pkT_medmarij+gmo$pkF_nafta+gmo$pkT_parisagree+ ...
648 sym
DIF
DIFFERENTIAL ITEM FUNCTIONING (DIF) METHODS 3 methods are shown here for detecting: uniform DIF (different item difficulty parameters) non-uniform DIF (different item discrimination parameters) Compare knowledge distributions for different respondents genderMC<-subset(gmo, select=c("pk_medmarij", "pk_nafta", "pk_parisagree", "pk_guantanamo", ...
388 sym