Malcolm Barrett

Malcolm Barrett is a PhD candidate in Epidemiology at the University of Southern California. His areas of research include eye and vision epidemiology, cancer symptom epidemiology, and psychometrics related to quality of life. He is an avid R user and teaches R to students and faculty of the Preventive Medicine department at USC, co-organizes the Los Angeles East R Users Group, develops R packages, and regularly contributes to popular R packages. His R packages include ggdag, a tool for visualizing and analyzing causal directed acyclic graphs, and precisely, a sample size planning tool that targets precision rather than power.