diff --git a/tabs/receiver.js b/tabs/receiver.js
index 89bb7e10..98593ba0 100644
--- a/tabs/receiver.js
+++ b/tabs/receiver.js
@@ -157,10 +157,6 @@ function tab_initialize_receiver() {
 
             var samples = 0;
 
-            var margin = {top: 20, right: 20, bottom: 10, left: 40};
-            var width = $('#RX_plot').width() - margin.left - margin.right;
-            var height = $('#RX_plot').height() - margin.top - margin.bottom;
-
             var svg = d3.select("svg");
 
             function update_ui() {
@@ -212,12 +208,21 @@ function tab_initialize_receiver() {
 
                 // update required parts of the plot
                 var widthScale = d3.scale.linear().
-                    domain([(samples - 299), samples]).
-                    range([0, width]);
+                    domain([(samples - 299), samples]);
 
                 var heightScale = d3.scale.linear().
-                    domain([800, 2200]).
-                    range([height, 0]);
+                    domain([800, 2200]);
+
+                function update_receiver_plot_size() {
+                    var margin = {top: 20, right: 20, bottom: 10, left: 40};
+                    var width = $('#RX_plot').width() - margin.left - margin.right;
+                    var height = $('#RX_plot').height() - margin.top - margin.bottom;
+                    widthSclae.range([0, width]);
+                    heightScale.range([height, 0]);
+                }
+
+                update_receiver_plot_size();
+
 
                 var xGrid = d3.svg.axis().
                     scale(widthScale).
diff --git a/tabs/sensors.js b/tabs/sensors.js
index 16bca564..dbc6d9db 100644
--- a/tabs/sensors.js
+++ b/tabs/sensors.js
@@ -40,22 +40,27 @@ function tab_initialize_sensors() {
         return sampleNumber + 1;
     }
 
-    function initGraphHelpers(selector, sampleNumber, heightDomain) {
+    function updateGraphHelperSize(selector, helpers) {
         var margin = {top: 20, right: 20, bottom: 10, left: 40};
         var width = $(selector).width() - margin.left - margin.right;
         var height = $(selector).height() - margin.top - margin.bottom;
 
+        helpers.widthScale.range([0, width]);
+        helpers.heightScale.range([height, 0]);
+    }
+
+    function initGraphHelpers(selector, sampleNumber, heightDomain) {
         var helpers = {selector: selector, dynamicHeightDomain: !heightDomain};
 
         helpers.widthScale = d3.scale.linear()
             .clamp(true)
-            .domain([(sampleNumber - 299), sampleNumber])
-            .range([0, width]);
+            .domain([(sampleNumber - 299), sampleNumber]);
 
         helpers.heightScale = d3.scale.linear()
             .clamp(true)
-            .domain(heightDomain || [1, -1])
-            .range([height, 0]);
+            .domain(heightDomain || [1, -1]);
+
+        updateGraphHelperSize(selector, helpers);
 
         helpers.xGrid = d3.svg.axis()
             .scale(helpers.widthScale)