This shell script reads a three-dimensional IFU NDF datacube as input, presents you with a white-light image of the cube and allows you to select an $X$-$Y$ position using the cursor. It then extracts (and optionally displays) the spectrum for that $X$-$Y$ position.

• -i filename
  be a three-dimensional NDF. By default the script will prompt for the input file.

• -ofilename
  The filename for the output spectrum. By default the script will prompt for the name of the output file.

• -p
  The script will plot the extracted spectrum to the current display as well as saving it to an NDF file. [FALSE]

This script invokes a collection of A-tasks from the Kappa package.