com.github.lwhite1.tablesaw.api.ml.features.PrincipalComponents Maven / Gradle / Ivy

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package com.github.lwhite1.tablesaw.api.ml.features;

import com.github.lwhite1.tablesaw.api.NumericColumn;
import com.github.lwhite1.tablesaw.util.DoubleArrays;
import smile.projection.PCA;

/**
 *
 */
public class PrincipalComponents {

  private final PCA pca;

  public static PrincipalComponents create(boolean useCorrelationMatrix, NumericColumn ... columns) {
    double[][] data = DoubleArrays.to2dArray(columns);
    return new PrincipalComponents(data, useCorrelationMatrix);
  }

  private PrincipalComponents(double[][] data, boolean useCorrelationMatrix) {
    this.pca = new PCA(data, useCorrelationMatrix);
  }

  public double[] getCenter() {
    return pca.getCenter();
  }

  public double[] getCumulativeVarianceProportion() {
    return pca.getCumulativeVarianceProportion();
  }

  public double[] getVarianceProportion() {
    return pca.getVarianceProportion();
  }

  public double[] getVariance() {
    return pca.getVariance();
  }

  public double[] project(double[] x) {
    return pca.project(x);
  }

  public double[][] project(double[][] x) {
    return pca.project(x);
  }

  public double[][] getLoadings() {
    return pca.getLoadings();
  }

  public double[][] getProjection() {
    return pca.getProjection();
  }
  public PCA setProjection(int p) {
    return pca.setProjection(p);
  }

  public PCA setProjection(double p) {
    return pca.setProjection(p);
  }
}