Query an Object for Information
The function query can be used to search an object
for a keyword.
query(x,pattern,...) ## S4 method for signature 'data.set' query(x,pattern,...) ## S4 method for signature 'importer' query(x,pattern,...) ## S4 method for signature 'item' query(x,pattern,...) # (Called by the methods above.)
x |
an object |
pattern |
a character string that gives the pattern to be searched for |
... |
optional arguments such as
|
If both the annotation and the value labels of an item match the pattern
the query method for 'item' objects returns a list containing the annotation
and the value labels, otherwise if only the annotation or the value labels
match the pattern, either the annotation or the value labels are returned,
otherwise if neither matches the pattern, query returns NULL.
The methods of query for 'data.set' and 'importer' objects return
a list of all non-NULL query results of all items contained by these
objects, or NULL.
nes1948.por <- unzip(system.file("anes/NES1948.ZIP",package="memisc"),
"NES1948.POR",exdir=tempfile())
nes1948 <- spss.portable.file(nes1948.por)
query(nes1948,"TRUMAN")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.