chi_squared

ctapipe.image.chi_squared(image, prediction, pedestal, error_factor=2.9)

Simple chi-squared statistic from Le Bohec et al 2008

Parameters

image: ndarray

Pixel amplitudes from image (\(s\)).

prediction: ndarray

Predicted pixel amplitudes from model (\(μ\)).

pedestal: ndarray

Width of pedestal (\(σ_p\)).

error_factor: float

Ad-hoc error factor

Returns

float