Keep nentries of first histogram after division (#154)

* Keep nentries of first histogram after division

* bump version

Author: Moelf

Project.toml

@@ -1,7 +1,7 @@
 name = "FHist"
 uuid = "68837c9b-b678-4cd5-9925-8a54edc8f695"
 authors = ["Moelf <proton[at]jling.dev>", "Nick Amin <amin.nj[at]gmail.com>"]
-version = "0.11.12"
+version = "0.11.13"
 
 [deps]
 BayesHistogram = "000d9b38-65fe-4c81-bdb9-69f01f102479"

src/arithmatics.jl

@@ -34,7 +34,7 @@ for T in (:Hist1D,:Hist2D,:Hist3D)
         _sumw2 =  sumw2(h1) ./ (counts2 .^ 2) .+
             (sqrt.(sumw2(h2)) .* counts1 ./ (counts2 .^ 2)) .^ 2
 
-        ($T)(bincounts = newcounts, binedges = edge1, sumw2 = _sumw2, nentries = nentries(h1) ÷ nentries(h2); overflow=h1.overflow)
+        ($T)(bincounts = newcounts, binedges = edge1, sumw2 = _sumw2, nentries = nentries(h1); overflow=h1.overflow)
     end
 
     @eval function merge!(h1::$T, h2::$T)

test/runtests.jl

@@ -364,10 +364,12 @@ end
         h = h1 / h2
         @test bincounts(h) == [1.0, 2.0, 0.5]
         @test sumw2(h) == [2.0, 6.0, 0.375]
+        @test nentries(h) == nentries(h1)
 
         h = h1 * 2
         @test bincounts(h) == [2.0, 4.0, 2.0]
         @test sumw2(h) == [4.0, 8.0, 4.0]
+        @test nentries(h) == nentries(h1)
 
         h = h1/(h1+h2*2)
         @test bincounts(h) ≈ [0.333333, 0.5, 0.2] atol=1e-6