Hello! I have a data set with almost 2,000 variables (called 'Data'). I want to select only a set of variables that have a certain string in them (e.g., "Variable") - 'Variable.1', 'Variable.2', etc. until 'Variable.20'.
2 questions: 1. How can I determine the exact column index of a variable in the data frame if I know its exact name? (I am asking because names(Data) allows me to see only the last 1,348 variables) 2. How can I grab only variables that have a string "Variable" in their name using grep? Thank you! Dimitri ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
