# extract-columns

## Usage:

crux extract-columns [options] <tsv file> <column names>

## Description:

Given a tab-delimited file and a comma-delimited list of column names, extract the requested columns.

## Input:

• tsv file – A tab-delimited file, with column headers in the first row. Use "-" to read from standard input.
• column names – A comma-delimited list of column names.

## Output:

• stdout – the requested columns in tab-delimited format. The columns are printed in the same order that they appear in the input column list.

## Options:

• ### Input and output

• --delimiter <string> – Specify the input and output delimiter to use when processing the delimited file. The argument can be either a single character or the keyword 'tab.' Default = tab.
• --header T|F – Print the header line of the file, in addition to the columns that match. Default = true.
• --verbosity <integer> – Specify the verbosity of the current processes. Each level prints the following messages, including all those at lower verbosity levels: 0-fatal errors, 10-non-fatal errors, 20-warnings, 30-information on the progress of execution, 40-more progress information, 50-debug info, 60-detailed debug info. Default = 30.