AngularJS : How do I switch views from a controller function?

I am trying to use the ng-click feature of AngularJS to switch views. How would I go about doing this with the code below?

index.html

 <div ng-controller="Cntrl">
        <div ng-click="someFunction()">
            click me
        <div>
    <div>

controller.js

  function Cntrl ($scope) {
        $scope.someFunction = function(){
            //code to change view?
        }
    }