0th

Percentile

##### Usage
## S3 method for class 'default}(file, colClasses=NULL, isPatterns=FALSE, defColClass=NA, header=FALSE, skip=0, nrows=-1, rows=NULL, col.names=NULL, check.names=FALSE, path=NULL, ..., stripQuotes=TRUE, method=c("readLines", "intervals"), verbose=FALSE)':

Reads a file in table format and creates a data frame from it, with cases corresponding
to lines and variables to fields in the file.

WARNING: This method is very much in an alpha stage.
Expect it to change.

This method is an extension to the default read.table()
function in R.  It is possible to specify a column name to column class
map such that the column classes are automatically assigned from the

The method is optimized such that only columns and rows that are of
interest are parsed and read into R's memory.  This minimizes memory
usage at the same time as it speeds up the reading.

file{A connection or a filename.  If a filename, the path
specified by path is added to the front of the
filename.  Unopened files are opened and closed at the end.}
colClasses{Either a named or an unnamed character vector.
If unnamed, it specified the column classes just as used by
If it is a named vector, names(colClasses) are used to match
the column classes are set to the corresponding values.
}
isPatterns{If TRUE, the matching of names(colClasses) to
the read column names is done by regular expressions matching.}
defColClass{If the column class map specified by a named
colClasses argument does not match some of the read column
names, the column class is by default set to this class. The
default is to read the columns in an "as is" way.}
skip{The number of lines (commented or non-commented) to skip
nrows{The number of rows to read of the data table.
Ignored if rows is specified.}
rows{An row index vector specifying which rows of the table
Non-existing rows are ignored.  Note that rows are returned in
the same order they are requested and duplicated rows are also
returned.}
check.names{Same as in read.table(), but default value
is FALSE here.}
path{If file is a filename, this path is added to it,
otherwise ignored.}
...{Arguments passed to read.table() used internally.}
stripQuotes{If TRUE, quotes are stripped from values before
being parse.
This argument is only effective when method=="readLines".
}
internally to first only read rows of interest, which is then
If "intervals", contigous intervals are first identified in
the rows of interest.  These intervals are the read one by one
The latter methods is faster and especially more memory efficient
if the intervals are not too many, where as the former is prefered
if many "scattered" rows are to be read.}
verbose{A logical or a Verbose object.}

Returns a data.frame.

[object Object]

IO