lookup.xport {SASxport}R Documentation

Describe the Contents of an SAS XPORT File

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 on a local file
lookup.xport("Alfalfa.xpt")

## Or read a copy of test2.xpt available on the web:
## Not run: 
host <- 'http://biostat.mc.vanderbilt.edu'
path <- '/cgi-bin/viewvc.cgi/*checkout*/Hmisc/trunk/tests/test2.xpt'
url <- paste(host,path,sep="")

w <- lookup.xport(url)

# 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 
## End(Not run)


[Package SASxport version 1.2.2 Index]