Description Usage Arguments Details Value See Also Examples
Describe the contents of an SAS XPORT file.
1 2 3 4 5 6 7 |
file |
Character string specifying the name or URL of a SAS XPORT file. |
x, object |
Object to be printed or summarized |
... |
Optional arguments |
The lookup.xport
function is a simple wrapper for the
lookup.xport
function provided by the
foreign
library. The wrapper adds the ability to handle URL's,
and returns an object of class lookup.xport
for which
appropriate print
, and summary
functions are provided.
lookup.xport
returns a list with one component for each dataset
in the XPORT format library.
summary.lookup.xport
returns a single data frame containing:
dataset |
Dataset name, |
name |
Variable name, |
type |
Type of variable (one of 'character' or 'numeric'), |
format |
SAS format, |
width |
SAS format width, |
label |
Variable label, |
nobs |
Number of observations. |
For complete documentation of lookup.xport
see the manual page
for lookup.xport
.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | ## Get information about a local file
alfFile <- system.file('extdata', 'Alfalfa.xpt', package='SASxport')
lookup.xport(alfFile)
## Read a copy of test2.xpt available on the web:
## Not run:
url <- 'http://biostat.mc.vanderbilt.edu/wiki/pub/Main/Hmisc/test2.xpt'
w <- lookup.xport(url)
## End(Not run)
## Or use the local copy...
testFile <- system.file('extdata', 'test2.xpt', package="SASxport")
w <- lookup.xport(testFile)
# display the information (calls 'print.lookup.xport')
w
# names of data sets
names(w)
# names of variables within data sets
w$Z$name
# use summary
wS <- summary(w)
wS # same display
# variable names within all data sets
wS$name
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.