man/examples/searchSDF.R

In EdSurvey: Analysis of NCES Education Survey and Assessment Data

\dontrun{
# read in the example data (generated, not real student data)
sdf <- readNAEP(path=system.file("extdata/data", "M36NT2PM.dat", package="NAEPprimer"))

# search both the student and school files by a character string
searchSDF(string="book", data=sdf)

# use the `|` (OR) operator to search several strings simultaneously
searchSDF(string="book|home|value", data=sdf)

# use a vector of strings to search for variables that contain multiple strings,
# such as both "book" and "home"
searchSDF(string=c("book","home"), data=sdf)

# search only the student files by a character string
searchSDF(string="algebra", data=sdf, fileFormat="student")

# search both the student and school files and return a glimpse of levels
searchSDF(string="value", data=sdf, levels=TRUE)

# save the search as an object to return a full data.frame of search
ddf <- searchSDF(string="value", data=sdf, levels=TRUE)
ddf
}