1 files changed, 11 insertions, 0 deletions
diff --git a/src/web/app/common/scripts/get-median.ts b/src/web/app/common/scripts/get-median.ts
new file mode 100644
index 0000000000..91a415d5b2
--- /dev/null
+++ b/src/web/app/common/scripts/get-median.ts
@@ -0,0 +1,11 @@
+/**
+ * 中央値を求めます
+ * @param samples サンプル
+ */
+export default function(samples) {
+	if (!samples.length) return 0;
+	const numbers = samples.slice(0).sort((a, b) => a - b);
+	const middle = Math.floor(numbers.length / 2);
+	const isEven = numbers.length % 2 === 0;
+	return isEven ? (numbers[middle] + numbers[middle - 1]) / 2 : numbers[middle];
+}