p3-extract

Select Columns from an Input File

p3-extract [options] col1 col2 ... colN

This script extracts the specified columns from a tab-delimited file.

Parameters

The positional parameters are the numbers or names of the columns to include in the output. The column numbers are 1-based, and the column names are taken from the header record of the input file.

The standard input may be overridden by the command-line options given in Input Options.

The following additional options are supported.

• all

Output all the columns. This simply copies the file.

• reverse

Output all the columns not listed, rather than the listed columns.

• nohead

If specified, the file is presumed to have no headers.