One of the possible ways to improve the results of an experiment on the IBM machine using the Qiskit language is to use the measurement calibration methods. This is the link to the documentation.
I understood that the calibration matrix is made looking at when a qubit in a determined state is measured in one other state. But I didn't get how this calibration matrix is applied to the results to obtain the mitigated results.
This is the command used:
mitigated_results = meas_filter.apply(my_results, method).