dynamic symbol size for (effect)scatter type in geo chart

[dithmer]

Hey everyone!

I was asking myself if it is possible to achieve something like this:
https://echarts.apache.org/examples/en/editor.html?c=geo-svg-scatter-simple

It is an example of a geo chart, with the EffectScatter type, which have dynamic symbolSize values for the series, based on a callback function and the data per point.

Is it possible at the moment? I've already tried something like this

geo.AddSeries("geo", types.ChartEffectScatter, geoData, func(s *charts.SingleSeries) {                                                                                                                                                                                        
  s.SymbolSize = func(params interface{}) interface{} {                                                                                                                                                                                                                     
    return params.([]interface{})[2].(float64) / maxVal * 50                                                                                                                                                                                                              
  }
})

But it just does, that the chart isn't rendered.

Thanks in advance and best regards

[Koooooo-7]

Hi @dithmer , go-echarts support insert a pure js func string into config instead of compile go func to do that trick.
You could try something like this instead:

	const symbolFunc = `
             function (params) {
                return (params[2] / 100) * 15 + 5;
             }
         `
	geo.AddSeries("geo", types.ChartEffectScatter, geoData, func(s *charts.SingleSeries) {
		s.SymbolSize = opts.FuncOpts(symbolFunc)
	})