cpoerschke commented on a change in pull request #242:
URL: https://github.com/apache/solr/pull/242#discussion_r683304620
##########
File path:
solr/contrib/ltr/src/java/org/apache/solr/ltr/model/MultipleAdditiveTreesModel.java
##########
@@ -292,10 +291,10 @@ private static float scoreNode(float[] featureVector,
RegressionTreeNode regress
return 0f;
}
- if (featureVector[regressionTreeNode.featureIndex] <=
regressionTreeNode.threshold) {
- regressionTreeNode = regressionTreeNode.left;
- } else {
+ if (featureVector[regressionTreeNode.featureIndex] >=
regressionTreeNode.threshold) {
Review comment:
The `==` going left or right is an interesting question! One way to
maintain backwards compatibility whilst supporting "go right instead of left"
could be via an optional configuration element e.g.
```
- "params" : { "trees" : [ ... ] }
+ "params" : { "trees" : [ ... ], "splitToRight" : true }
```
And if there is a `scoreNode` change then `explainNode` requires a matching
change I think.
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