delete kruskal with limit size, use largest size to limit it(uncontrolled group ...

[todo]

Rath/packages/visual-insights/src/ml/cluster/kruskal.ts

Lines 84 to 87 in 24f2609

	// todo: delete kruskal with limit size, use largest size to limit it(uncontrolled group number but better), need discuss.
	/**
	*
	* @param matrix

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This issue was generated by todo based on a todo comment in 24f2609 when #17 was merged. cc @Kanaries.

[ObservedObserver]

It seems not logical to limit a group size if members in it are highly correlated with each other. Now, we are using a threshold of correlation and group number.

The original reason for this issue is seeking a solution to limit the number of the field in one visualization. However, a large group of fields can be made into a dashboard or story instead of a single vis.