This package provides functions to read, list contents of, and write SAS export files.
lookup.xport Lookup Information on a SAS XPORT Format
Library
read.xport Import SAS XPORT files
toSAS.default Convert R data object for storage in SAS
xport file
units Set or Retrieve the label, SASformat,
SASiformat, or units Attribute of a Vector
write.xport Write data to a SAS XPORT file
makeSASNames Create valid SAS names from a character vector.
This creation of this package was partially funded by Metrum Institute http://metruminstitute.org.
Gregory R. Warnes greg@warnes.net
The read.xport function reads SAS xport formatted files,
augmenting the functionality of the read.xport
function provided in the 'foreign' package with additional features,
borrowed from sasxport.get in Frank Harrell's
'Hmisc' package. Namely, variables are properly coerced into the
types specified by the format field. All standard numeric and string
SAS formats are supported automatically, while user-defined formats
are supported when the user has included the appropriate format data
in the xport file via:
PROC FORMAT CNTLOUT=format;
In addition, labels are supported for variable and data frames, as are dataset 'types'.
The write.xport function writes one or more data sets into a
SAS xport formatted file. Standard R data types, including date and
time objects (e.g. Date, and POSIX.t) are stored with
proper SAS format types. Handling of object formatting is
customizable by providing methods for the function toSAS.
This is accomplished by writing a new method for toSAS for the
object class of interest. The toSAS method is responsible for
converting its argument to either a simple floating point or
character variable (the only basic types permitted by the xport
format) and adding the appropriate SAS format code in the
"SASformat" attribute.
The write.xport function also allows the user to override the
operating system type and SAS version information, as well as object
creation and modification times.