getDataInfo(dh)
openData.
"double",
"character", or
"factor".
TRUE for those variables that will be included
in the imported
and
FALSE for those variables that will be dropped.
The length of the
name,
class
, and
keep
vectors in the returned list is the number of variables (columns) in the
external data set i.e. all variables
are listed whether they are kept or dropped.
# First create an external data set:
exportData(Quinidine, "Quinidine.ssd01") # a SAS data set
# Open the external data set for subsequent reads:
dh <- openData("Quinidine.ssd01", rowsToRead=100, drop="Subject")
# Get variable names and type:
getDataInfo(dh)
# Close the external data file:
closeData(dh)