lib/utils/1D/evalGuess/evalGuess.js

/** 
Returns an expected result using supplied inputs and weights
@param {array[numbers]} input - An array representing x and y values
@param {array[numbers]} weightArr - An array representing weights used to estimate a y value
@return {number} An expected y value
*/
export function evalGuess(input, weightArr) {
	if(!Array.isArray(input) || Array.isArray(input[0]) || typeof input[0] != 'number') {
		throw new Error('evalGuess: input is not a single dimensional array of numbers');
	}

	if(!Array.isArray(weightArr) || Array.isArray(weightArr[0]) || typeof weightArr[0] != 'number') {
		throw new Error('evalGuess: weightArr is not a single dimensional array of numbers');
	}

	return weightArr.reduce((prev, curr, i) => {
		return prev + input[i] * curr;
	})
}