Flocking is a fascinating phenomenon observed across a wide range of living organisms. We investigate, based on a simple theoretical particle model, how the emergence of ordered motion in a collectively moving group is influenced by the local rules of interactions among the individuals, namely, metric versus topological interactions as debated over in the current literature.

This is a theoretical research work. The equation of motion is solved numerically using a standard way of solving an ordinary differential equation.

1. Simulation codes are provided to generate data for all figures in the paper and supplementary materials. One has to just run the "run.sh" file to generate data for all the figures. 

2. The data files for metric interaction and topological interaction with lower flock speed (V0=0.01) are also provided, to generate the plots one need to run "*.m" file.