Ionic framework and angular ui calendar issue?

I am using ui calendar to provide a calendar view in my application.

Question: The calendar loads fine and the calendar also accepts events just that I can not seem to access the calendar object using $scope.myCalendar.fullCalendar('prev'); through my controller that i am using.

If I am doing this wrong could you please provide an explanation as to how to access the calendar object?

Plunker

$scope.myCalendar.fullCalendar('prev')

this essentially invokes a function prev() on the encapsulated calendar object.

fullCalendar.js:line 132: var r = calendar[options].apply(calendar, args);

After invoking the function it will return this which is the result because check this out in fullCalendar.js

function prev() {
    renderView(-1);
}

This is not returning anything.

If you want to get date try passing 'getDate' to fullCalendar

 $scope.previousEntries = function(){
    $scope.myCalendar.fullCalendar('prev');
    var calenderDate = $scope.myCalendar.fullCalendar('getDate');
  }