write.foreign {foreign} | R Documentation |
This function exports simple data frames to other statistical packages by writing the data as free-format text and writing a separate file of instructions for the other package to read the data.
write.foreign(df, datafile, codefile, package = c("SPSS", "Stata", "SAS"), ...)
df |
A data frame |
datafile |
Name of file for data output |
codefile |
Name of file for code output |
package |
Name of package |
... |
Other arguments for the individual |
The work for this function is done by
foreign:::writeForeignStata
, foreign:::writeForeignSAS
and
foreign:::writeForeignSPSS
. To add support for another package,
eg Systat, create a function writeForeignSystat
with the same first
three arguments as write.foreign
. This will be called from
write.foreign
when package="Systat"
.
Numeric variables and factors are supported for all packages: dates and
times (Date
, dates
, date
, and POSIXt
classes) and logical vectors are also supported for SAS and characters
are supported for SPSS.
For package="SAS"
there are optional arguments
dataname = "rdata"
taking a string that will be the SAS data set
name, validvarname
taking either "V6"
or "V7"
,
and libpath = NULL
taking a string that will be the directory where
the target SAS datset will be written when the generated SAS code been
run.
Invisible NULL
.
Thomas Lumley and Stephen Weigand
## Not run: datafile<-tempfile() codefile<-tempfile() write.foreign(esoph,datafile,codefile,package="SPSS") file.show(datafile) file.show(codefile) unlink(datafile) unlink(codefile) ## End(Not run)