[
https://issues.apache.org/jira/browse/MADLIB-925?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Frank McQuillan closed MADLIB-925.
----------------------------------
> Improve RF output format for variable importance (and new DT/RF impurity
> importance)
> -------------------------------------------------------------------------------------
>
> Key: MADLIB-925
> URL: https://issues.apache.org/jira/browse/MADLIB-925
> Project: Apache MADlib
> Issue Type: Improvement
> Components: Module: Random Forest
> Reporter: Frank McQuillan
> Assignee: Nandish Jayaram
> Priority: Major
> Labels: starter
> Fix For: v1.15
>
>
> As a user,
> I want to have an easier way of accessing the variable importance output from
> random forest so that I can understand which are the most important variables.
> Current method of getting variable importance for each variable (in a tabular
> format - assuming output table name is `rf_output`):
> ```
> SELECT unnest(regexp_split_to_array(cat_features, ',')) as variable,
> unnest(cat_var_importance) as importance
> FROM rf_output_group, rf_output_summary;
> ```
> This is a cumbersome query to write and has to be written twice - for
> categorical and for continuous features.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
