[MADLIB-1323] MLP - fix column name in output table

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: v1.16
• Component/s: Module: Neural Networks
• Assignee: Unassigned
• Reporter: Frank McQuillan
• Created: 11/Apr/19 19:42
• Updated: 08/May/19 16:58
• Resolved: 06/May/19 18:52

Description

http://madlib.apache.org/docs/latest/group__grp__nn.html#example

output_table
TEXT. Name of the table where output predictions are written. If this table name is already in use, an error is returned. Table contains:
id	Gives the 'id' for each prediction, corresponding to each row from the data_table.
estimated_COL_NAME	(For pred_type='response') The estimated class for classification or value for regression, where COL_NAME is the name of the column to be predicted from training data.
prob_CLASS	
(For pred_type='prob' for classification) The probability of a given class CLASS as given by softmax. There will be one column for each class in the training data.

But the code outputs `estimated_prob_CLASS`, e.g.

estimated_prob_Iris_setosa | estimated_prob_Iris_versicolor

so we should fix this so it outputs `prob_CLASS`, e.g.

prob_Iris_setosa | prob_Iris_versicolor