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Web主要技术栈数据可视化Echarts；管理系统VUE框架；HTTP服务Python Django ，Python Flask；MQTT 物联网服务 Mosquitto；支持主流的MQTT云服务厂商对接：阿里云物联网平台，EMQ物联网平台等；数据库 Mysql；支持PostgreSQ... WebNov 30, 2016 · 3 Answers. You have to call chartInstance.setOption () again with your new data. // eChart is the chart instance! echart.setOption ( { // .... some configuration … WebbinMethod - string.直方图提供了四种计算小区间间隔个数的方法，分别是 squareRoot, scott, freedmanDiaconis 和 sturges。这里的每个小区间间隔又称为 bin，所有的小区间间隔组成的数组称为 bins。当然，对于一个直方图来说，没有所谓的最佳区间间隔个数，不同的区间间隔大小会揭示数据样本不同的数值特性。 dwayne haskins domestic v