diff --git a/src/models/legend.js b/src/models/legend.js
index d8fba55..3a3c4a2 100644
--- a/src/models/legend.js
+++ b/src/models/legend.js
@@ -12,6 +12,7 @@ nv.models.legend = function() {
     , align = true
     , rightAlign = true
     , updateState = true   //If true, legend will update data.disabled and trigger a 'stateChange' dispatch.
+    , radioButtonMode = false   //If true, clicking legend items will cause it to behave like a radio button. (only one can be selected at a time)
     , dispatch = d3.dispatch('legendClick', 'legendDblclick', 'legendMouseover', 'legendMouseout', 'stateChange')
     ;
 
@@ -48,11 +49,19 @@ nv.models.legend = function() {
           .on('click', function(d,i) {
             dispatch.legendClick(d,i);
             if (updateState) {
-               d.disabled = !d.disabled;
-               if (data.every(function(series) { return series.disabled})) {
-                   //the default behavior of NVD3 legends is, if every single series
-                   // is disabled, turn all series' back on.
-                   data.forEach(function(series) { series.disabled = false});
+               if (radioButtonMode) {
+                   //Radio button mode: set every series to disabled,
+                   //  and enable the clicked series.
+                   data.forEach(function(series) { series.disabled = true});
+                   d.disabled = false;
+               }
+               else {
+                   d.disabled = !d.disabled;
+                   if (data.every(function(series) { return series.disabled})) {
+                       //the default behavior of NVD3 legends is, if every single series
+                       // is disabled, turn all series' back on.
+                       data.forEach(function(series) { series.disabled = false});
+                   }
                }
                dispatch.stateChange({
                   disabled: data.map(function(d) { return !!d.disabled })
@@ -245,6 +254,12 @@ nv.models.legend = function() {
     return chart;
   };
 
+  chart.radioButtonMode = function(_) {
+    if (!arguments.length) return radioButtonMode;
+    radioButtonMode = _;
+    return chart;
+  };
+
   //============================================================