Expand SAS Style Variable/Column List — ru

Pass in a data frame along with column/variable identifiers formatted with SAS Style (i.e., using colon) and it will be expanded to the actual variable list.

Usage

ru_expvarlist(dsetin, varsin = NULL, keepnotexist = FALSE)

Arguments

dsetin: A dataframe holding columns whose names will be expanded.
varsin: A SAS style list of variable names.
keepnotexist: If the variable does not exist on the dataframe it will be excluded from the list.

Value

A list of column/variable names.

Author

Yongwei Wang, yongwei.x.wang@viivhealthcare.com
Chris Rook, cr883296@gmail.com

Examples

library(repfun)
df <- data.frame(tt_ac01=c('1','2','3'),
                 tt_ac02=c('a','b','b'),
                 tt_ac03=c('10','11','12'))
chk <- repfun::ru_expvarlist(df, varsin="tt_ac:")
print(chk)
#> [1] "tt_ac01" "tt_ac02" "tt_ac03"