+ },
+ zoom: {
+ enabled: true
+ },
+ tooltip: {
+ format: {
+ name: function (name, ratio, id, index) {
+ var re = /\d m/;
+ var res = re.exec(name);
+ return res;
+ },
+ value: function (value, ratio, id, index) {
+ return value + '°';
+ }
+ }
+ },
+ grid: {
+ y: {
+ show: true
+ }