search for: drop_var

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2012 Nov 24
5
subsetting - questions
...ror message for # 5 and # 7 ? 2) How to fix the code? I would appreciate receiving your help. Thanks, Pradip Muhuri ###### Reproducible Example ##### N <- 100 set.seed(13) df<-data.frame(matrix(sample(c(1:10),N, replace=TRUE),ncol=5)) keep_var <- c("X1", "X2") drop_var <- c("X3", "X4", "X5") df[df$X1>=8,] [,1:2] #1 df[df$X1>=8,] [,-c(3,4,5)] #2 df[df$X1>=8,] [,c(-3,-4,-5)] #3 df[df$X1>=8,] [,c("X1", "X2")] #4 df[df$X1>=8,] [,-c("X3", &qu...