Script used to prepare PIV data files, create masks/outlines from images, manually correct outlines (if necessary),compute pressure fields, thrust and drag forces acting on the body, and the Froude efficiency. Please refer to the following publication for details about pressure field calculations from 2D velocity fields: Dabiri, J. O., Bose, S., Gemmell, B. J., Colin, S. P. and Costello, J. H. (2014). An algorithm to estimate unsteady and quasi-steady pressure fields from velocity field measurements. J. Exp. Biol. 217, 331–336.