Package edu.cmu.tetrad.search.test

Class IndTestRegression

java.lang.Object
edu.cmu.tetrad.search.test.IndTestRegression
All Implemented Interfaces:
IndependenceTest
public final class IndTestRegression extends Object implements IndependenceTest
Checks independence of X _||_ Y | Z for variables X and Y and list Z of variables by regressing X on {Y} U Z and testing whether the coefficient for Y is zero.
Author:
josephramsey, Frank Wimberly

  • Constructor Details

    • IndTestRegression

      public IndTestRegression(DataSet dataSet, double alpha)
      Constructs a new Independence test which checks independence facts based on the correlation matrix implied by the given data set (must be continuous). The given significance level is used.
      Parameters:
      dataSet - A data set containing only continuous columns.
      alpha - The alpha level of the test.

  • Method Details

    • indTestSubset

      public IndependenceTest indTestSubset(List<Node> vars)
      Creates a new IndTestCramerT instance for a subset of the variables.
      Specified by:
      indTestSubset in interface IndependenceTest
      Parameters:
      vars - The sublist of variables.

    • checkIndependence

      public IndependenceResult checkIndependence(Node xVar, Node yVar, List<Node> zList)
      Determines whether variable x is independent of variable y given a list of conditioning variables z.
      Specified by:
      checkIndependence in interface IndependenceTest
      Parameters:
      xVar - the one variable being compared.
      yVar - the second variable being compared.
      zList - the list of conditioning variables.
      Returns:
      true iff x _||_ y | z.
      Throws:
      RuntimeException - if a matrix singularity is encountered.
      See Also:

    • getPValue

      public double getPValue()
      Returns:
      the probability associated with the most recently computed independence test.

    • setAlpha

      public void setAlpha(double alpha)
      Sets the significance level at which independence judgments should be made. Affects the cutoff for partial correlations to be considered statistically equal to zero.
      Specified by:
      setAlpha in interface IndependenceTest
      Parameters:
      alpha - This level.

    • getAlpha

      public double getAlpha()
      Gets the getModel significance level.
      Specified by:
      getAlpha in interface IndependenceTest
      Returns:
      This level.

    • getVariables

      public List<Node> getVariables()
      Specified by:
      getVariables in interface IndependenceTest
      Returns:
      the list of variables over which this independence checker is capable of determinine independence relations-- that is, all the variables in the given graph or the given data set.

    • toString

      public String toString()
      Description copied from interface: IndependenceTest
      Returns a string representation of this test.
      Specified by:
      toString in interface IndependenceTest
      Overrides:
      toString in class Object
      Returns:
      This string.

    • determines

      public boolean determines(List<Node> zList, Node xVar)
      Description copied from interface: IndependenceTest
      Returns true if y is determined the variable in z.
      Specified by:
      determines in interface IndependenceTest
      Returns:
      True if so.

    • getData

      public DataSet getData()
      Specified by:
      getData in interface IndependenceTest
      Returns:
      The data model for the independence test, either a DataSet or a CovarianceMatrix.
      See Also:

    • getScore

      public double getScore()
      Description copied from interface: IndependenceTest
      Return A score that is higher with more likely models.
      Specified by:
      getScore in interface IndependenceTest
      Returns:
      This score.

    • isVerbose

      public boolean isVerbose()
      Description copied from interface: IndependenceTest
      Returns true if the test prints verbose output.
      Specified by:
      isVerbose in interface IndependenceTest
      Returns:
      True if the case.

    • setVerbose

      public void setVerbose(boolean verbose)
      Description copied from interface: IndependenceTest
      Sets whether this test will print verbose output.
      Specified by:
      setVerbose in interface IndependenceTest
      Parameters:
      verbose - True if so.