a lot

apps/web/src/utils/math.ts

@@ -1,12 +1,22 @@
+import { isNumber } from 'mathjs';
+
 export const round = (num: number, decimals = 2) => {
   const factor = Math.pow(10, decimals);
   return Math.round((num + Number.EPSILON) * factor) / factor;
 };
 
-export const average = (arr: number[]) =>
-  arr.reduce((p, c) => p + c, 0) / arr.length;
+export const average = (arr: (number | null)[]) => {
+  const filtered = arr.filter(isNumber);
+  return filtered.reduce((p, c) => p + c, 0) / filtered.length;
+};
 
-export const sum = (arr: number[]) =>
-  round(arr.reduce((acc, item) => acc + item, 0));
+export const sum = (arr: (number | null)[]): number =>
+  round(arr.filter(isNumber).reduce((acc, item) => acc + item, 0));
+
+export const min = (arr: (number | null)[]): number =>
+  Math.min(...arr.filter(isNumber));
+
+export const max = (arr: (number | null)[]): number =>
+  Math.max(...arr.filter(isNumber));
 
 export const isFloat = (n: number) => n % 1 !== 0;