algostrata - npm Package Compare versions

Comparing version 1.0.0 to 1.1.0

index.js

@@ -20,3 +20,23 @@ // function savingsAfterYear
 
+// function differenceAfterYearWithFirstYear
+// Calculates the difference in accumulated value based on identical returns, but difference in costs, where the first year can have a different cost
+//
+// Arguments:
+// initialValue: Number
+// returnPerYear: Number
+// baseCostPerYear: Number
+// costFirstYear: Number
+// newCostPerYear: Number
+// atYear: Number
 
+function differenceAfterYearWithFirstYear(initialValue, returnPerYear, baseCostPerYear, newCostFirstYear, newCostPerYear, atYear) {
+  const baseReturns = (1 + returnPerYear - baseCostPerYear);
+  const newReturnsFirstYear = (1 + returnPerYear - newCostFirstYear);
+  const newReturns = (1 + returnPerYear - newCostPerYear);
+
+  const differenceInReturnsAtYear = newReturnsFirstYear + Math.pow(newReturns, atYear - 1) - Math.pow(baseReturns, atYear);
+
+  return initialValue * differenceInReturnsAtYear;
+}
+
 // function valueAtYearWithStandardDeviation
@@ -41,2 +61,2 @@ // Calculates the total value at a year, based on return and standard deviation.
 
-module.exports = { differenceAfterYear, valueAtYearWithStandardDeviation };
+module.exports = { differenceAfterYear, differenceAfterYearWithFirstYear, valueAtYearWithStandardDeviation };

package.json

 {
   "name": "algostrata",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "calculation library for algostrata",
@@ -5,0 +5,0 @@ "main": "index.js",

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Improved metrics

Total package byte prevSize

2507

increased by55.33%

Lines of code

47

increased by56.67%

No dependency changes