Update dependencies, extend quality-function

Project.toml

@@ -20,6 +20,7 @@ KM3NeTTestData = "3249b543-581e-4f22-b7da-6c2cdf549b24"
 KM3io = "2cab5852-6f21-4982-99b0-6a4792870cfb"
 LandauDistribution = "6012e1b8-0df6-47e7-96ae-5acef29e6d22"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+PGFPlotsX = "8314cec4-20b6-5062-9cdb-752b83310925"
 Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 ProgressMeter = "92933f4c-e287-5a05-a399-4b506db050ca"
 RecipesBase = "3cdcf5f2-1ef4-517c-9805-6587b60abb01"
@@ -39,7 +40,7 @@ DocStringExtensions = "^0.8, ^0.9"
 HDF5 = "^0.16, ^0.17"
 HTTP = "^1"
 KM3NeTTestData = "^0.4.7"
-KM3io = "^0.15.0"
+KM3io = "^0.15.0 ^0.16.2"
 LandauDistribution = "^0.2"
 ProgressMeter = "^1"
 RecipesBase = "^0.7, ^0.8, ^1"

src/scanfit.jl

@@ -125,6 +125,8 @@ Base.angle(m1::T, m2::T) where T<:MuonScanfitCandidate = angle(m1.dir, m2.dir)
 The quality of the fit, the larger the better, as used in e.g. Jpp.
 """
 quality(χ², N, NDF) = N  -  0.25 * χ² / NDF
+quality(χ², NDF) = NDF  -  0.25 * χ² / NDF
+quality(χ²) = -χ^2
 
 abstract type EstimatorModel end