tobac.analysis.cell_analysis.calculate_cog

tobac.analysis.cell_analysis.calculate_cog(tracks, mass, mask)

Calculate center of gravity and mass for each tracked cell.

Parameters:

• tracks (pandas.DataFrame) – DataFrame containing trajectories of cell centers.

• mass (iris.cube.Cube) – Cube of quantity (need coordinates ‘time’, ‘geopotential_height’,’projection_x_coordinate’ and ‘projection_y_coordinate’).

• mask (iris.cube.Cube) – Cube containing mask (int > where belonging to area/volume of feature, 0 else).

Returns:

tracks_out – Dataframe containing t, x, y, z positions of center of gravity and total mass of each tracked cell at each timestep.

Return type:

pandas.DataFrame