Fix: ensure max_num_event a integer to avoid index error

[Jiaxi-Huang]

when execute example_fastapi.ipynb in docs folder as tutorial

from app import run_gamma

config["region"] = "Ridgecrest"
config["event_index"] = 1

picks_ = picks.copy()
evengts_, picks_ = run_gamma(picks, stations, config)

meet error like

TypeError Traceback (most recent call last) Cell In[12], line 7 4 config["event_index"] = 1 6 picks_ = picks.copy() ----> 7 evengts_, picks_ = run_gamma(picks, stations, config) 9 plt.figure() 10 mapping_color = lambda x: f"C{x}" if x!= -1 else "black"

File ~/Code/LX/814-918/phase_associator/GaMMA/docs/app.py:134, in run_gamma(picks, stations, config_) 129 stations[["x(km)", "y(km)"]] = stations.apply( 130 lambda x: pd.Series(proj(longitude=x.longitude, latitude=x.latitude)), axis=1 131 ) 132 stations["z(km)"] = stations["elevation_m"].apply(lambda x: -x / 1e3) --> 134 events, assignments = association(picks, stations, config, 0, config["method"]) 136 if events is None: 137 return None, None

File ~/Code/LX/814-918/.venv/lib/python3.9/site-packages/gamma/utils.py:204, in association(picks, stations, config, event_idx0, method, **kwargs) 202 events, assignment = [], [] 203 for unique_label in list(unique_labels): --> 204 events_, assignment_ = associate( 205 unique_label, 206 labels, 207 data, 208 locs, 209 phase_type, 210 phase_weight, 211 pick_idx, 212 pick_station_id, 213 config, 214 timestamp0, 215 vel, 216 method, 217 event_idx, 218 ) 219 event_idx += len(events_) 220 events.extend(events_)

File ~/Code/LX/814-918/.venv/lib/python3.9/site-packages/gamma/utils.py:315, in associate(k, labels, data, locs, phase_type, phase_weight, pick_idx, pick_station_id, config, timestamp0, vel, method, event_idx, lock) 308 return [], [] 310 # time_range = max(data_[:, 0].max() - data_[:, 0].min(), 1) 311 # if config["use_amplitude"]: 312 # amp_range = max(data_[:, 1].max() - data_[:, 1].min(), 1) 313 314 # ## initialization with [1,1,1] horizontal points and N time points --> 315 centers_init = init_centers(config, data_, locs_, phase_type_, phase_weight_, max_num_event) 317 ## run clustering 318 # mean_precision_prior = 0.01 / time_range 319 if "covariance_prior" in config:

File ~/Code/LX/814-918/.venv/lib/python3.9/site-packages/gamma/utils.py:621, in init_centers(config, data_, locs_, type_, weight_, max_num_event) 619 s_index = index[type_ == "s"] 620 if len(p_index) >= max_num_event: --> 621 index = p_index[:: max(len(p_index) // max_num_event, 1)][:max_num_event] 622 else: 623 num = max_num_event - len(p_index)

TypeError: slice indices must be integers or None or have an index method

we notice that it is a error caused by non-integer index, so add one line print(max_num_event) and we got float num 16.0. So I guess it is supposed to transform int(max_num_event) as integer