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https://issues.apache.org/jira/browse/MADLIB-1097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16005862#comment-16005862
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ASF GitHub Bot commented on MADLIB-1097:
----------------------------------------
Github user iyerr3 closed the pull request at:
https://github.com/apache/incubator-madlib/pull/131
> Random Forest does not allow NULL values in features
> ----------------------------------------------------
>
> Key: MADLIB-1097
> URL: https://issues.apache.org/jira/browse/MADLIB-1097
> Project: Apache MADlib
> Issue Type: Improvement
> Components: Module: Random Forest
> Reporter: Nandish Jayaram
> Assignee: Rahul Iyer
> Priority: Minor
> Fix For: v1.12
>
>
> Running forest_train() with features that have NULL values results in the
> following error:
> {code}
> psql:/tmp/madlib.LkFR_5/recursive_partitioning/test/random_forest.sql_in.tmp:79:
> ERROR: spiexceptions.InvalidParameterValue: Function
> "_rf_cat_imp_score(bytea8,integer[],double
> precision[],integer[],integer,double precision,boolean,double precision[])":
> Invalid type conversion. Null where not expected.
> CONTEXT: Traceback (most recent call last):
> PL/Python function "forest_train", line 42, in <module>
> sample_ratio
> PL/Python function "forest_train", line 605, in forest_train
> PL/Python function "forest_train", line 1052, in _calculate_oob_prediction
> PL/Python function "forest_train"
> {code}
> The following are the input table and parameters used:
> {code:sql}
> CREATE TABLE dt_golf (
> id integer NOT NULL,
> "OUTLOOK" text,
> temperature double precision,
> humidity double precision,
> windy boolean,
> class text
> ) ;
> INSERT INTO dt_golf (id,"OUTLOOK",temperature,humidity,windy,class) VALUES
> (1, 'sunny', 85, 85, false, 'Don''t Play'),
> (2, 'sunny', 80, 90, true, 'Don''t Play'),
> (3, 'overcast', 83, 78, false, 'Play'),
> (4, 'rain', NULL, 96, false, 'Play'),
> (5, 'rain', 68, 80, NULL, 'Play'),
> (6, 'rain', 65, 70, true, 'Don''t Play'),
> (7, 'overcast', 64, 65, true, 'Play'),
> (8, 'sunny', 72, 95, false, 'Don''t Play'),
> (9, 'sunny', 69, 70, false, 'Play'),
> (10, 'rain', 75, 80, false, 'Play'),
> (11, 'sunny', 75, 70, true, 'Play'),
> (12, 'overcast', 72, 90, true, 'Play'),
> (13, 'overcast', 81, 75, false, 'Play'),
> (14, 'rain', 71, 80, true, 'Don''t Play');
> SELECT forest_train(
> 'dt_golf'::TEXT, -- source table
> 'train_output'::TEXT, -- output model table
> 'id'::TEXT, -- id column
> 'class'::TEXT, -- response
> 'windy, temperature'::TEXT, -- features
> NULL::TEXT, -- exclude columns
> NULL::TEXT, -- no grouping
> 5, -- num of trees
> 1, -- num of random features
> TRUE::BOOLEAN, -- importance
> 1::INTEGER, -- num_permutations
> 10::INTEGER, -- max depth
> 1::INTEGER, -- min split
> 1::INTEGER, -- min bucket
> 8::INTEGER, -- number of bins per continuous variable
> 'max_surrogates=0',
> FALSE
> );
> {code}
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