From 298c6fd516839dafeca30be98d81ea884a8dc034 Mon Sep 17 00:00:00 2001
From: Orion Yeung <11580988+orionyeung001@users.noreply.github.com>
Date: Tue, 16 Apr 2024 18:49:44 -0500
Subject: [PATCH] =?UTF-8?q?fix:=20return=20None=20for=20Gamma::mode=20when?=
 =?UTF-8?q?=20=CE=B1=20<=201?=
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---
 src/distribution/gamma.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/distribution/gamma.rs b/src/distribution/gamma.rs
index 9c497487..4e7dfd49 100644
--- a/src/distribution/gamma.rs
+++ b/src/distribution/gamma.rs
@@ -236,15 +236,15 @@ impl Mode<Option<f64>> for Gamma {
     /// # Formula
     ///
     /// ```text
-    /// max{(α - 1) / β, 0}
+    /// (α - 1) / β, where α > 1
     /// ```
     ///
     /// where `α` is the shape and `β` is the rate
     fn mode(&self) -> Option<f64> {
-        if self.shape > 1.0 {
+        if self.shape >= 1.0 {
             Some((self.shape - 1.0) / self.rate)
         } else {
-            Some(0.0)
+            None
         }
     }
 }