Tag: get nonmatching strings in R

  • R error in data.frame : undefined columns selected

    R error in data.frame : undefined columns selected

    For me, R error undefined columns selected appears when I try to select some of the columns to keep in the data frame. It is easy to solve. You have to search for the misspelled column name, but if there is a long list of column names, then here is how to do that quickly.