GNU awk

GNU awk is a wrapper that provides flexible text manipulation to the Discovery Environment via the GNU awk 4.0 command and its associated programming language.

Quick Start

• To use GNU awk, upload your data in text format.
• Resources:
  • Awk by Example
  • Learn awk in 1 hour
  • awk Cheat-sheet
  • awk One-liners

Test Data

All files are located in the Community Data directory of the iPlant Discovery Environment at the following path:

Community Data > iplantcollaborative > example_data >  gnu_awk

Input File(s)

Use Countries.txt as test data.

Parameters Used in App

When the app is run in the Discovery Environment, use the following parameters with the above input file(s) to get the output provided in the next section below.

You must enter a valid awk program. One that will work on the test data at hand is

{print $1, ($3 - $4)}

Output File(s)

Expect a text file 'awk_out.txt' as output.

Tool Source for App

• http://savannah.gnu.org/projects/gawk/