The SAS transport format is a open format, as is required for submission of the data to the FDA.
read_xpt( file, col_select = NULL, skip = 0, n_max = Inf, .name_repair = "unique" )
write_xpt(data, path, version = 8, name = NULL, label = attr(data, "label"))
Either a path to a file, a connection, or literal data (either a single string or a raw vector).
Files ending in
be automatically uncompressed. Files starting with
ftps:// will be automatically
downloaded. Remote gz files can also be automatically downloaded and
Literal data is most useful for examples and tests. To be recognised as
literal data, the input must be either wrapped with
I(), be a string
containing at least one new line, or be a vector containing at least one
string with a new line.
Using a value of
clipboard() will read from the system clipboard.
One or more selection expressions, like in
list() to use more than one expression.
?dplyr::select for details on available selection options. Only the
specified columns will be read from
Number of lines to skip before reading data.
Maximum number of lines to read.
Treatment of problematic column names:
"minimal": No name repair or checks, beyond basic existence,
"unique": Make sure names are unique and not empty,
"check_unique": (default value), no name repair, but check they are
"universal": Make the names
unique and syntactic
a function: apply custom name repair (e.g.,
.name_repair = make.names
for names in the style of base R).
A purrr-style anonymous function, see
This argument is passed on as
See there for more details on these terms and the strategies used
to enforce them.
Data frame to write.
Path to a file where the data will be written.
Version of transport file specification to use: either 5 or 8.
Member name to record in file. Defaults to file name sans extension. Must be <= 8 characters for version 5, and <= 32 characters for version 8.
Dataset label to use, or
NULL. Defaults to the value stored in
the "label" attribute of
Note that although SAS itself supports dataset labels up to 256 characters long, dataset labels in SAS transport files must be <= 40 characters.
A tibble, data frame variant with nice defaults.
Variable labels are stored in the "label" attribute of each variable. It is not printed on the console, but the RStudio viewer will show it.
If a dataset label is defined, it will be stored in the "label" attribute of the tibble.
write_xpt() returns the input