This directory contains model files for the IRB140.
Prior to 2016, Drake was built around a substantial base of MATLAB software. Most of that was removed from the head of git master during 2017.
To view or use the original MATLAB implementation of IRB140 you may use this tag:
https://github.com/RobotLocomotion/drake/tree/last_sha_with_original_matlab/drake/examples/IRB140