unable to use group_by if using label attribute from sas file

[johngoldin]

testsas <- group_by(read_sas("http://crn.cancer.gov/resources/ctcodes-procedures.sas7bdat"), code_type)
#   Error: column 'px' of type character has unsupported attributes: label

By using as_factor to change all columns with label attribute I can fix things so that group_by works.

testsas <- read_sas("http://crn.cancer.gov/resources/ctcodes-procedures.sas7bdat")
testsas$px <- as_factor(testsas$px)
testsas$code_type <- as_factor(testsas$code_type)
testsas$description <- as_factor(testsas$description)
testsas$chemo_type <- as_factor(testsas$chemo_type)
testsas$comments <- as_factor(testsas$comments)
group_by(testsas, code_type)

[hadley]

This is a dplyr problem - will be fixed in next version