diff --git a/examples/js/src/neighbourSampling-papaparsing/linkForce.js b/examples/js/src/neighbourSampling-papaparsing/linkForce.js
index 27a6e2c..89bcb49 100644
--- a/examples/js/src/neighbourSampling-papaparsing/linkForce.js
+++ b/examples/js/src/neighbourSampling-papaparsing/linkForce.js
@@ -12,7 +12,7 @@ function startLinkSimulation() {
   // Initialize link array.
   nodes = simulation.nodes();
   for (i = 0; i < nodes.length; i++) {
-    for (j = 0; j < nodes.length; j++) {
+    for (j = 0; j < i; j++) {
       if (i !== j) {
         links.push({
           source: nodes[i],