[MADLIB-1094] Elastic Net fails when used without normalization

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: v1.12
• Component/s: Module: Regularized Regression
• Assignee: Unassigned
• Reporter: Nandish Jayaram
• Created: 24/Apr/17 17:36
• Updated: 17/Aug/17 21:22
• Resolved: 10/Aug/17 23:07

Description

Using Elastic Net with the normalization/standardize flag turned off (for Gaussian IGD) results in failure, with the following error:

madlib-pg94=# SELECT madlib.elastic_net_train(
'houses1',
'houses_en',
'array[tax, bath, size]',
'gaussian',
0.5,
0.1, 
FALSE,  -- Standardize 
NULL,
'igd',
'',
NULL,
10000,1e-6);

ERROR:  spiexceptions.NumericValueOutOfRange: value out of range: overflow
CONTEXT:  Traceback (most recent call last):
  PL/Python function "elastic_net_train", line 23, in <module>
    return elastic_net.elastic_net_train(**globals())
  PL/Python function "elastic_net_train", line 332, in elastic_net_train
  PL/Python function "elastic_net_train", line 42, in __elastic_net_gaussian_igd_train
  PL/Python function "elastic_net_train", line 268, in __elastic_net_igd_train
  PL/Python function "elastic_net_train", line 373, in __elastic_net_igd_train_compute
  PL/Python function "elastic_net_train", line 69, in __elastic_net_generate_result
  PL/Python function "elastic_net_train", line 154, in __compute_log_likelihood
PL/Python function "elastic_net_train"

Issue Links

• links to: GitHub Pull Request #164