WeichenXu123 commented on pull request #30587:
URL: https://github.com/apache/spark/pull/30587#issuecomment-738495133
The master code use some werid logic to compare:
```
(col1.asBreeze - col2.asBreeze).toArray.toSeq.sliding(2).foreach {
case Seq(v1, v2) => assert(v1 ~= v2 absTol 1E-3)
}
```
change it to compare left and right directly.
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