40 lines
1.2 KiB
JavaScript
40 lines
1.2 KiB
JavaScript
/**
|
|
* Calculate the distances by using the numbers, strings and dates.
|
|
* @param {node} source
|
|
* @param {node} target
|
|
* @param {array} properties - the properties of the nodes.
|
|
* @return {number} the distance between source and target nodes.
|
|
*/
|
|
function calculateCosineSimilarity(source, target, properties, normArgs) {
|
|
var numerator = 0.0;
|
|
|
|
// console.log(properties);
|
|
// Iterate through every column of data
|
|
for (var i = 0; i < properties.length; i++) {
|
|
property = properties[i];
|
|
if (property.toLowerCase() !== "class" && property.toLowerCase() !== "app" && property.toLowerCase() !== "user" && property.toLowerCase() !== "weekday") {
|
|
var s = source[property],
|
|
t = target[property];
|
|
|
|
numerator += s * t;
|
|
}
|
|
}
|
|
|
|
let denominator = squareRooted(source, properties, normArgs) * squareRooted(target, properties, normArgs);
|
|
|
|
// console.log(Math.abs(numerator / denominator));
|
|
return Math.abs(numerator / denominator);
|
|
}
|
|
|
|
function squareRooted(node, properties, normArgs) {
|
|
var sum = 0.0;
|
|
|
|
for (var i = 0, s; i < properties.length; i++) {
|
|
var s = node[properties[i]];
|
|
|
|
sum += s * s;
|
|
}
|
|
|
|
return Math.sqrt(sum);
|
|
}
|