Kendo Change SeriesDefault Chart Type Dynamically - dynamic

Question

The Code works But I wanna Change Chart Type Dynamically. I tried Change Chart Type in function WeightLine However It does not work. It changes SeriesDefault type , I see new chart type in alert but does not draw new chart type.
var mydata=[{"date":"2013-03-06","data":2916,"name":"weight"},{"date":"2013-03-05","data":3708,"name":"weight"}];
function getFilter(xMin, xMax) {
return [{
field: "date",
operator: "gt",
value: xMin
}, {
field: "date",
operator: "lt",
value: xMax
}];
}
$("#line_chart_weight").kendoChart({
title: {
text: "weight"
},
dataSource:{
data: mydata,
group: {
field: "name"
},
sort: {
field: "date",
dir: "asc"
},
schema: {
model: {
fields: {
date: {
type: "date"
}
}
}
}
},
seriesDefaults: {
type: "scatterLine"
},
series: [{
xField:"date",
yField: "data"
}],
yAxis: {
labels: {
format: "{0}"
},
title: {
text: "KG",
padding: {
left: 20
}}
}, xAxis: {
labels:
{
rotation: -90,
format:"dd-MM-yyyy"
},
title: {
text: "Date",
padding: {
top: 20
}},
type:"date",
name:"CategoryAxis"
},
tooltip: {
visible: true,
format:"dd-MM-yyyy",
color:"white"
},
transitions: false,
drag: onDragw,
zoom: onDragw
});
var weight=$("#line_chart_weight").data("kendoChart");
function onDragw(e) {
var ds = weight.dataSource;
var options = weight.options;
e.originalEvent.preventDefault();
var categoryRange = e.axisRanges.CategoryAxis;
if (categoryRange) {
var xMin = categoryRange.min;
var xMax = categoryRange.max;
options.categoryAxis.min = xMin;
options.categoryAxis.max = xMax;
ds.filter(getFilter(xMin, xMax));
weight.redraw();
}
}
function WeightLine(WeightTypeString){ weight.options.seriesDefaults.type=WeightTypeString;alert(weight.options.seriesDefaults.type); weight.redraw();}

Answer 1

it is a bit weird but i write something to solve this. both of them worked for me. You can modify them for your code.
1.
var chart = $("#chartId").data("kendoChart");
chart.setOptions({ seriesDefaults: {type : "radarColumn"} });
chart.dataSource.read();
chart.refresh();
2.
var chart = $("#chartId").data("kendoChart");
for(i = 0; i< chart.options.series.length;i++){
chart.options.series[i].type = "radarColumn";
}
chart.refresh();