remove NaN

coordinate_g.py

 df_global['z'] = 2.7 * ((df_global['z'] - df_global['z'].min()) / (df_global['z'].max() - df_global['z'].min())) + 0.3
 #print(df_global)
 
+df_global = df_global.fillna(0)
 df_summary = df_global[df_global['frame']% 30 == 1]
 #print(df_summary)
 df_global.to_csv(os.path.join(target_dir,'coordinate.csv'))