Dynamically change zoom - angularjs

Question

I need to change zoom of Google Maps. Code:
function _initMap(vm) {
vm.windowOptions = {
show: false
};
var latSum = 0;
var longSum = 0;
for (var i = 0, length = vm.markers.length; i < length; i++) {
//calculate center of map (1st part)
latSum += vm.markers[i].coords.latitude;
longSum += vm.markers[i].coords.longitude;
//assign an icon
vm.markers[i].iconUrl = getIconUrl(vm.markers[i].deviceType);
}
var centeredLatitude = latSum / vm.markers.length;
var centeredLongitude = longSum / vm.markers.length;
vm.control = {};
vm.map = {
center: setCenterMap(),
options: getMapOptions(),
zoom: setMapZoom(),
events: {
click: function (mapModel, eventName, originalEventArgs) {
var e = originalEventArgs[0];
$log.log('gz', e.latLng.lat() + ' ' + e.latLng.lng());
console.log('xxx', mapModel);
}
},
show: true,
refresh: function (a, b, c, d) {
vm.map.control.refresh();
}
};
vm.clusterOptions = {
minimumClusterSize: 2,
zoomOnClick: true,
styles: [{
url: 'assets/images/markers/m1.png',
width: 53,
height: 53,
textColor: 'white',
textSize: 17,
fontFamily: 'Open Sans'
}],
averageCenter: true,
clusterClass: 'cluster-icon'
};
vm.window = {
location: undefined,
templateUrl: 'app/components/maps/maps.info.template.html',
show: false,
options: getMapWindowOptions()
};
vm.clickMarker = function (marker, event, object) {
vm.window.show = false;
vm.window.details = object.details;
vm.window.location = object.coords;
vm.window.show = true;
vm.sendChoosenDeviceToController(object);
angular.element('#right-menu').focus();
};
vm.closeClick = function () {
vm.window.show = false;
}
}
but the code:
center: setCenterMap()
zoom: setMapZoom()
when I call the methods center and zoom does not change center and zoom. How to update center and zoom dynamically ? The methods are properly exectued during initiation of map but after initialization does not want to change.

Answer 1

The solution was just simply:
scope.map.center = {
'latitude': scope.markers[i].coords.latitude,
'longitude': scope.markers[i].coords.longitude
};
GoogleMaps knows about that change and works nice.