You have some problems with your data.
This should be working:
http://plnkr.co/edit/buQHJL2QAn6iQcjrKjdX?p=preview
質問
Can someone please show me why my Plunker doesn't like me?
http://plnkr.co/edit/Ft1YgUsXCnFxfyr5ob8r
Thanks,
JP
解決
You have some problems with your data.
This should be working:
http://plnkr.co/edit/buQHJL2QAn6iQcjrKjdX?p=preview