columns: ["c"], types: ["c": .string] ) dataFrame.removeRow(at:0) } test() and it crashes in roughly the same way. I’m running this as a command-line tool on macOS 13.4. I tested with both Xcode 14.3 and Xcode 15 beta and it crashes either way. I then put this code into...
范例2: # Defining columnsx<- factor(c(7,3,3,7,5,5,1))y<- factor(c(1,1,1,4,4,4,2))z<- c(1,5,3,2,9,4,7)# Defining data framedf<-data.frame(x,y,z)df<- df[1:6, ]# Print structure of data framestr(df)cat("\n")# Drop levels from data framedf_drop<-dropleve...