series->symbol支持函数类型，根据需要来设置每个数据的图形

[SmartSmallFish]

series->symbol支持函数类型
如果需要每个数据的图形不一样，可以设置为如下格式的回调函数：
(value: Array|number, params: Object) => number|Array
eg.

symbol: function (value, params) {
  return `${symbol}`;
}

注：返回的symbol支持类型同之前

[SmartSmallFish]

series.scatter -> symbol

[Ovilia]

@helllojayden Could you further explain what this is used for? Because for scatter series, you may define symbol.

[Ovilia]

Sorry. Closed by mistake. Reopened.

[SmartSmallFish]

when typeof symbolType === 'function', it will invoke and return the symbol, just like symbolSize

[SmartSmallFish]

i do not define a new symbol type, when symbolType is the function type, it invoked and return the
symbol that types supported before

[SmartSmallFish]

@Ovilia sorry to reply late，i explained in the comments

[Ovilia]

OK. I'm not sure this is how symbols work. @100pah Please have a look.