Class: Aws::Glue::Types::FindMatchesMetrics

Inherits:
Struct
  • Object
show all
Defined in:
gems/aws-sdk-glue/lib/aws-sdk-glue/types.rb

Overview

The evaluation metrics for the find matches algorithm. The quality of your machine learning transform is measured by getting your transform to predict some matches and comparing the results to known matches from the same dataset. The quality metrics are based on a subset of your data, so they are not precise.

See Also:

Constant Summary collapse

SENSITIVE = 
[]

Instance Attribute Summary collapse

Instance Attribute Details

#area_under_pr_curve ⇒ Float

The area under the precision/recall curve (AUPRC) is a single number measuring the overall quality of the transform, that is independent of the choice made for precision vs. recall. Higher values indicate that you have a more attractive precision vs. recall tradeoff.

For more information, see Precision and recall in Wikipedia.

Returns:

  • (Float) 


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# File 'gems/aws-sdk-glue/lib/aws-sdk-glue/types.rb', line 8855

class FindMatchesMetrics < Struct.new(
  :area_under_pr_curve,
  :precision,
  :recall,
  :f1,
  :confusion_matrix,
  :column_importances)
  SENSITIVE = []
  include Aws::Structure
end

#column_importances ⇒ Array<Types::ColumnImportance>

A list of ColumnImportance structures containing column importance metrics, sorted in order of descending importance.

Returns:



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# File 'gems/aws-sdk-glue/lib/aws-sdk-glue/types.rb', line 8855

class FindMatchesMetrics < Struct.new(
  :area_under_pr_curve,
  :precision,
  :recall,
  :f1,
  :confusion_matrix,
  :column_importances)
  SENSITIVE = []
  include Aws::Structure
end

#confusion_matrix ⇒ Types::ConfusionMatrix

The confusion matrix shows you what your transform is predicting accurately and what types of errors it is making.

For more information, see Confusion matrix in Wikipedia.

Returns:



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# File 'gems/aws-sdk-glue/lib/aws-sdk-glue/types.rb', line 8855

class FindMatchesMetrics < Struct.new(
  :area_under_pr_curve,
  :precision,
  :recall,
  :f1,
  :confusion_matrix,
  :column_importances)
  SENSITIVE = []
  include Aws::Structure
end

#f1 ⇒ Float

The maximum F1 metric indicates the transform's accuracy between 0 and 1, where 1 is the best accuracy.

For more information, see F1 score in Wikipedia.

Returns:

  • (Float) 


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# File 'gems/aws-sdk-glue/lib/aws-sdk-glue/types.rb', line 8855

class FindMatchesMetrics < Struct.new(
  :area_under_pr_curve,
  :precision,
  :recall,
  :f1,
  :confusion_matrix,
  :column_importances)
  SENSITIVE = []
  include Aws::Structure
end

#precision ⇒ Float

The precision metric indicates when often your transform is correct when it predicts a match. Specifically, it measures how well the transform finds true positives from the total true positives possible.

For more information, see Precision and recall in Wikipedia.

Returns:

  • (Float) 


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# File 'gems/aws-sdk-glue/lib/aws-sdk-glue/types.rb', line 8855

class FindMatchesMetrics < Struct.new(
  :area_under_pr_curve,
  :precision,
  :recall,
  :f1,
  :confusion_matrix,
  :column_importances)
  SENSITIVE = []
  include Aws::Structure
end

#recall ⇒ Float

The recall metric indicates that for an actual match, how often your transform predicts the match. Specifically, it measures how well the transform finds true positives from the total records in the source data.

For more information, see Precision and recall in Wikipedia.

Returns:

  • (Float) 


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# File 'gems/aws-sdk-glue/lib/aws-sdk-glue/types.rb', line 8855

class FindMatchesMetrics < Struct.new(
  :area_under_pr_curve,
  :precision,
  :recall,
  :f1,
  :confusion_matrix,
  :column_importances)
  SENSITIVE = []
  include Aws::Structure
end