all these changes

frontend/node_modules/density-clustering/lib/Utils.js

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+function Utils() {
+
+}
+
+
+KMEANS.prototype.getRandomVector = function(extremes) {
+  var maxDim = extremes.length;
+  var x = [];
+  var r = 0;
+  
+  // calculate radius of n-sphere which covers all points in dataset
+  var nSphereRadius = 0;
+  for (var i = 0; i < maxDim; i++) {
+    var extreme = extremes[i];
+    var er = Math.max(extreme.center - extreme.min, extreme.center - extreme.max);
+    if (er > nSphereRadius)
+      nSphereRadius = er;
+  }
+  
+  for (var i = 0; i < maxDim; i++) {
+    var val = (Math.random() * 2) - 1;
+    // adjust to radius of n-sphere
+    x.push(val);
+    r += val * val;
+  }
+      
+  r = Math.sqrt(r);
+  
+  for (var i = 0; i < maxDim; i++) {
+    x[i] /= r;
+    // resize to fit n-sphere
+    x[i] *= nSphereRadius;
+    x[i] += extremes[i].center;
+  }
+  
+  return x;
+}