TypeError: missing a required argument: 'position_measure'

I am trying to use the Metrics Example: https://stonesoup.readthedocs.io/en/latest/auto_examples/Metrics.html But I am getting this error:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
[<ipython-input-11-e0641a4bc732>](https://localhost:8080/#) in <module>()
      1 from stonesoup.metricgenerator.tracktotruthmetrics import SIAPMetrics
      2 
----> 3 siap_generator = SIAPMetrics(position_mapping=[0, 2], velocity_mapping=[1, 3]) # trocaram mapping por measure
      4 #siap_generator = SIAPMetrics(position_measure=[0, 2], velocity_measure=[1, 3])

4 frames
[/usr/lib/python3.7/inspect.py](https://localhost:8080/#) in _bind(self, args, kwargs, partial)
   2928                             msg = 'missing a required argument: {arg!r}'
   2929                             msg = msg.format(arg=param.name)
-> 2930                             raise TypeError(msg) from None
   2931             else:
   2932                 # We have a positional argument to process

TypeError: missing a required argument: 'position_measure'

[oharrald-Dstl]

Yes, same issue here. metric for metric in metrics is looping through the keys of the metrics dictionary. None of the keys have .title so checking if .title == "OSPA distances" won’t find anything. Change the line to: ospa_metric = metrics["OSPA distances"]

[oharrald-Dstl]

If this is on the latest version of Stone Soup main, metrics are returned as a dictionary. Therefore when iterating through metrics, you will be looping through the dictionary’s keys. Attempting to call metric.title leads to your error it seems. Could you try replacing that loop with the following:

for metric_name, value in metrics.items(): \tif not any(s in metric_name for s in ('SIAP', 'OSPA', 'plot')): \t\tprint(f"{metric_name}: {value}")