Started to modify the Weihs batching, but not seeing any minimum distance in the simulation results.  I'm going to jump back to Alberto's earlier version to see what went wrong.  Maybe my code change parameter values that messed things up.
I made some modest changes to streamline the code and ease post-processing.
updated run_batch_sim to run simulations for different prey response distances. The prey's initial position is what's being varied in the outermost loop. The data is stored in a cell 'S' and saved onto a Dropbox folder. The function will also plot the optimal angles from Weihs along with simulation results.