Scripts and data underpinning "Flow Recirculation in Continental Grids"

These are the MATLAB and Python scripts that underpin Kelly, C. & Cuffe, P. "Flow Recirculation in Continental Grids" in review with IEEE PES Letters.These scripts also underpin Chapter 4 'Diagnosing Cross-Border Flow Recirculation in Continental-Scale Power Grids' in the Research Masters thesis of Cian Kelly.These build on the function NEA.m available at https://uk.mathworks.com/matlabcentral/fileexchange/5261-nea-m and described in:B. D. Fath and S. R. Borrett, “A MATLAB function for network environ analysis,” Environmental Modelling & Software, vol. 21, no. 3, pp. 375–405, 2006.Input data is from the ENTSO-E Transparency Platform