Clarkclk commented on issue #9488: Is there any other way to make a node fixed in force graph than setoption() method? URL: https://github.com/apache/incubator-echarts/issues/9488#issuecomment-442358774 OK, now I set all node fixed after initial setOption method, but if I drag a node then this node becomes unfixed again (though other nodes remain fixed). So my question changes to how echarts make a node fixed property changed. If it has to use a method like setoption to render the whole graph? Or is there an inner interface to change a node property like fixed and axis easily? I think rendering the whole graph is time-consuming. So what is the inner method to change a node property? 中文：我在初始setOption之后会将所有节点设置为fixed，但如果我去拖动一个顶点，该顶点会重新编程unfixed（其他顶点保持fixed）。我的问题是，echarts内部是怎么改变一个顶点的属性的？如果也是类似于setOption一样的方法去重新渲染整个图太浪费时间了，或者有一个内部接口可以很方便的更改顶点属性值，比如fixed属性和坐标？
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