Example usage for org.apache.commons.math.stat.regression SimpleRegression getSlopeConfidenceInterval

Introduction

In this page you can find the example usage for org.apache.commons.math.stat.regression SimpleRegression getSlopeConfidenceInterval.

Prototype

public double getSlopeConfidenceInterval() throws MathException 

Source Link

Document

Returns the half-width of a 95% confidence interval for the slope estimate.

Usage

From source file:com.discursive.jccook.math.SimpleRegressionExample.java

public static void main(String[] args) throws MathException {

    SimpleRegression sr = new SimpleRegression();

    // Add data points       
    sr.addData(0, 0);/*  w  w w. ja v a 2 s . co m*/
    sr.addData(1, 1.2);
    sr.addData(2, 2.6);
    sr.addData(3, 3.2);
    sr.addData(4, 4);
    sr.addData(5, 5);

    NumberFormat format = NumberFormat.getInstance();

    // Print the value of y when line intersects the y axis
    System.out.println("Intercept: " + format.format(sr.getIntercept()));

    // Print the number of data points
    System.out.println("N: " + sr.getN());

    // Print the Slope and the Slop Confidence
    System.out.println("Slope: " + format.format(sr.getSlope()));
    System.out.println("Slope Confidence: " + format.format(sr.getSlopeConfidenceInterval()));

    // Print RSquare a measure of relatedness
    System.out.println("RSquare: " + format.format(sr.getRSquare()));

    sr.addData(400, 100);
    sr.addData(300, 105);
    sr.addData(350, 70);
    sr.addData(200, 50);
    sr.addData(150, 300);
    sr.addData(50, 500);

    System.out.println("Intercept: " + format.format(sr.getIntercept()));
    System.out.println("N: " + sr.getN());
    System.out.println("Slope: " + format.format(sr.getSlope()));
    System.out.println("Slope Confidence: " + format.format(sr.getSlopeConfidenceInterval()));
    System.out.println("RSquare: " + format.format(sr.getRSquare()));

}

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