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On this page

  • FeatureTargetCorrelationPlot
    • Purpose
    • Test Mechanism
    • Signs of High Risk
    • Strengths
    • Limitations
  • Edit this page
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  1. Test descriptions
  2. Data Validation
  3. FeatureTargetCorrelationPlot

FeatureTargetCorrelationPlot

Visualizes the correlation between input features and the model's target output in a color-coded horizontal bar plot.

Purpose

This test is designed to graphically illustrate the correlations between distinct input features and the target output of a Machine Learning model. Understanding how each feature influences the model's predictions is crucial—a higher correlation indicates a stronger influence of the feature on the target variable. This correlation study is especially advantageous during feature selection and for comprehending the model's operation.

Test Mechanism

This FeatureTargetCorrelationPlot test computes and presents the correlations between the features and the target variable using a specific dataset. These correlations are calculated and are then graphically represented in a horizontal bar plot, color-coded based on the strength of the correlation. A hovering template can also be utilized for informative tooltips. It is possible to specify the features to be analyzed and adjust the graph's height according to need.

Signs of High Risk

  • There are no strong correlations (either positive or negative) between features and the target variable. This could suggest high risk as the supplied features do not appear to significantly impact the prediction output.
  • The presence of duplicated correlation values might hint at redundancy in the feature set.

Strengths

  • Provides visual assistance to interpreting correlations more effectively.
  • Gives a clear and simple tour of how each feature affects the model's target variable.
  • Beneficial for feature selection and grasping the model's prediction nature.
  • Precise correlation values for each feature are offered by the hover template, contributing to a granular-level comprehension.

Limitations

  • The test only accepts numerical data, meaning variables of other types need to be prepared beforehand.
  • The plot assumes all correlations to be linear, thus non-linear relationships might not be captured effectively.
  • Not apt for models that employ complex feature interactions, like Decision Trees or Neural Networks, as the test may not accurately reflect their importance.
EngleGrangerCoint
HighCardinality

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