Extract Columns from a Dataset

DESCRIPTION:

Selects (subscript extraction) a column (or columns) from a 1- or 2-dimensional dataset, retaining that dimensionality.

USAGE:

select.cols(x, columns) 

REQUIRED ARGUMENTS:

x
1- or 2-dimensional dataset whose column(s) will be selected. A 1-dimensional dataset is considered to be a single, unnamed column.
columns
logical, integer, or character vector specifying the column(s) of x which is/are to be selected.

VALUE:

The subscript extraction of columns of x, with the same dimensionality as x .

SEE ALSO:

, , , , .

EXAMPLES:

fuel.both <- insert.col(fuel.frame, "@END", 2, 
                        column.names=paste("orig", 
                                           name.cols(fuel.frame.orig)[1:2], 
                                           sep="."), 
                        fill=select.cols(fuel.frame.orig, 1:2))