guess_parameters

Import in python using from mcutils.scripts.non_central_chi.correct import guess_parameters

mcutils.scripts.non_central_chi.correct.guess_parameters(observed_signal, ncoils=None, use_dist='gamma')[source]

Makes an initial guess of the noise level and number of coils

Parameters

  • observed_signal – observed signal level

  • ncoils – number of coils used in the reconstruction (default: fit to data)

  • use_dist – which distribution to use to model the true signal

Returns

Initial parameters of the histogram fit:

  • log_noise: set to best-fit value evaluated on grid

  • ncoils: set to best-fit value evaluated on grid

  • f_no_signal: set to 0.5

  • gamma_shape or log(mean)

  • gamma_rate or variance