lookup.xport: Describe the Contents of an SAS XPORT File

In SASxport: Read and Write 'SAS' 'XPORT' Files

Description

Describe the contents of an SAS XPORT file.

Usage

lookup.xport(file)
## S3 method for class 'lookup.xport'
print(x, ...)
## S3 method for class 'lookup.xport'
summary(object, ...)
## S3 method for class 'summary.lookup.xport'
print(x, ...)

Arguments

file	Character string specifying the name or URL of a SAS XPORT file.
x, object	Object to be printed or summarized
...	Optional arguments

Details

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.

Value

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.

See Also

For complete documentation of lookup.xport see the manual page for lookup.xport.

Examples

## 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 

SASxport documentation built on March 13, 2020, 1:59 a.m.