From e8a24967a8699721dbbf1c741647256a2b8d300b Mon Sep 17 00:00:00 2001
From: Zhanibek <zhanibek.om@gmail.com>
Date: Thu, 4 Jan 2024 17:31:06 +0900
Subject: [PATCH] offset arrays fix for hist

---
 src/recipes.jl       | 10 ++++++----
 test/test_recipes.jl |  7 +++++++
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/recipes.jl b/src/recipes.jl
index c4ad757c7..c82a0ff01 100644
--- a/src/recipes.jl
+++ b/src/recipes.jl
@@ -194,14 +194,16 @@ function make_steps(x::AbstractArray, st, even)
     n = length(x)
     n == 0 && return zeros(0)
     newx = zeros(2n - (even ? 0 : 1))
-    newx[1] = x[1]
+    xstartindex = firstindex(x)
+    newx[1] = x[xstartindex]
     for i in 2:n
+        xindex = xstartindex - 1 + i
         idx = 2i - 1
         if st === :mid
-            newx[idx] = newx[idx - 1] = (x[i] + x[i - 1]) / 2
+            newx[idx] = newx[idx - 1] = (x[xindex] + x[xindex - 1]) / 2
         else
-            newx[idx] = x[i]
-            newx[idx - 1] = x[st === :pre ? i : i - 1]
+            newx[idx] = x[xindex]
+            newx[idx - 1] = x[st === :pre ? xindex : xindex - 1]
         end
     end
     even && (newx[end] = x[end])
diff --git a/test/test_recipes.jl b/test/test_recipes.jl
index 9aa989e66..34273b172 100644
--- a/test/test_recipes.jl
+++ b/test/test_recipes.jl
@@ -45,6 +45,13 @@ end
     @test Plots.ylims(vsp) == (-2, 5)
 end
 
+@testset "steps offset" begin
+    data = OffsetArray(rand(11), -5:5)
+    plot(data, linetype = :steppre)
+    plot(data, linetype = :stepmid)
+    plot(data, linetype = :steppost)
+end
+
 @testset "offset axes" begin
     tri = OffsetVector(vcat(1:5, 4:-1:1), 11:19)
     sticks = plot(tri, seriestype = :sticks)