From 1339b0c3a45f2ae410d57cb99e69994c89447247 Mon Sep 17 00:00:00 2001
From: mantikoros <sgrugett@gmail.com>
Date: Sun, 8 May 2022 15:42:01 -0400
Subject: [PATCH] normpdf variance mislabeled

---
 common/calculate-dpm.ts | 6 ++++--
 common/normal.ts        | 9 ++++++---
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/common/calculate-dpm.ts b/common/calculate-dpm.ts
index 0b0961c3..908af4d2 100644
--- a/common/calculate-dpm.ts
+++ b/common/calculate-dpm.ts
@@ -38,7 +38,7 @@ export function getNumericBets(
   contract: NumericContract,
   bucket: string,
   betAmount: number,
-  std = 0.01
+  variance = 0.01
 ) {
   const { bucketCount } = contract
   const bucketNumber = parseInt(bucket)
@@ -46,7 +46,9 @@ export function getNumericBets(
 
   const mean = bucketNumber / bucketCount
 
-  const allDensities = buckets.map((i) => normpdf(i / bucketCount, mean, std))
+  const allDensities = buckets.map((i) =>
+    normpdf(i / bucketCount, mean, variance)
+  )
   const densitySum = _.sum(allDensities)
 
   const rawBetAmounts = allDensities
diff --git a/common/normal.ts b/common/normal.ts
index 3d21af4b..32010215 100644
--- a/common/normal.ts
+++ b/common/normal.ts
@@ -1,9 +1,12 @@
-export function normpdf(x: number, mean = 0, std = 1) {
-  if (std === 0) {
+export function normpdf(x: number, mean = 0, variance = 1) {
+  if (variance === 0) {
     return x === mean ? Infinity : 0
   }
 
-  return Math.exp((-0.5 * Math.pow(x - mean, 2)) / std) / Math.sqrt(TAU * std)
+  return (
+    Math.exp((-0.5 * Math.pow(x - mean, 2)) / variance) /
+    Math.sqrt(TAU * variance)
+  )
 }
 
 const TAU = Math.PI * 2