mirror of
https://github.com/TheAlgorithms/JavaScript.git
synced 2025-07-04 07:29:47 +08:00
e112434dee
* Add prettier config * test: add test to check for absolute function * chore: es5 to es6 * test: add test to check mean function * test: add test for sum of digit * test: add test for factorial * test: add test for fibonnaci * test: add test for find HCF * test: add test for lcm * test: add gridget test * test: add test for mean square error * test: add test for modular binary exponentiation * test: add tests for palindrome * test: add test for pascals triangle * test: add tests for polynomial * test: add tests for prime check * test: add tests for reverse polish notation * test: add tests for sieve of eratosthenes * test: add tests for pi estimation monte carlo method * chore: move tests to test folder * chore: fix standardjs errors
22 lines
526 B
JavaScript
22 lines
526 B
JavaScript
// Wikipedia: https://en.wikipedia.org/wiki/Mean_squared_error
|
|
|
|
const meanSquaredError = (predicted, expected) => {
|
|
if (!Array.isArray(predicted) || !Array.isArray(expected)) {
|
|
throw new TypeError('Argument must be an Array')
|
|
}
|
|
|
|
if (predicted.length !== expected.length) {
|
|
throw new TypeError('The two lists must be of equal length')
|
|
}
|
|
|
|
let err = 0
|
|
|
|
for (let i = 0; i < expected.length; i++) {
|
|
err += (expected[i] - predicted[i]) ** 2
|
|
}
|
|
|
|
return err / expected.length
|
|
}
|
|
|
|
export { meanSquaredError }
|