From 2f18c63f6c4ea4841661812fcefc0f2ff5158ac7 Mon Sep 17 00:00:00 2001
From: maitriupadhyay03-cell <maitriupadhyay03@gmail.com>
Date: Sun, 7 Jun 2026 23:58:45 +0530
Subject: [PATCH 1/2] feat: implement median function in primary module

Implement median function to calculate median of f64 values.
---
 src/primary/median.rs | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 src/primary/median.rs

diff --git a/src/primary/median.rs b/src/primary/median.rs
new file mode 100644
index 0000000..f70aeb4
--- /dev/null
+++ b/src/primary/median.rs
@@ -0,0 +1,29 @@
+/// Returns the median of a sequence of `f64` values.
+///
+/// For an odd number of values, returns the middle value after sorting.
+/// For an even number of values, returns the average of the two middle values.
+/// Empty input returns `None`.
+///
+/// # Example
+/// ```
+/// use rustats::primary::median;
+///
+/// let values = [1.0, 3.0, 2.0];
+/// let m = median(&values);
+/// assert_eq!(m, Some(2.0));
+/// ```
+pub fn median(values: &[f64]) -> Option<f64> {
+      if values.is_empty() {
+                return None;
+      }
+
+    let mut sorted = values.to_vec();
+      sorted.sort_by(|a, b| a.partial_cmp(b).unwrap());
+
+    let len = sorted.len();
+      if len % 2 == 1 {
+                Some(sorted[len / 2])
+      } else {
+                Some((sorted[len / 2 - 1] + sorted[len / 2]) / 2.0)
+      }
+}

From d95829da2c304bf51cc84e874bbd41827fb54c12 Mon Sep 17 00:00:00 2001
From: maitriupadhyay03-cell <maitriupadhyay03@gmail.com>
Date: Mon, 8 Jun 2026 00:00:16 +0530
Subject: [PATCH 2/2] Add median module and export median function

---
 src/primary/mod.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/primary/mod.rs b/src/primary/mod.rs
index e301a63..15070d3 100644
--- a/src/primary/mod.rs
+++ b/src/primary/mod.rs
@@ -1,3 +1,6 @@
 pub mod mean;
 
 pub use mean::mean;
+
+pub mod median;
+pub use median::median;