Example usage for org.apache.commons.math3.exception.util LocalizedFormats CANNOT_COMPUTE_BETA_DENSITY_AT_0_FOR_SOME_ALPHA

Introduction

In this page you can find the example usage for org.apache.commons.math3.exception.util LocalizedFormats CANNOT_COMPUTE_BETA_DENSITY_AT_0_FOR_SOME_ALPHA.

Prototype

LocalizedFormats CANNOT_COMPUTE_BETA_DENSITY_AT_0_FOR_SOME_ALPHA

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Usage

From source file:statalign.utils.BetaDistribution.java

/** {@inheritDoc} */
@Override//  w  w w  . ja  v a 2 s . co  m
public double density(double x) {
    recomputeZ();
    if (x < 0 || x > 1) {
        return 0;
    } else if (x == 0) {
        if (alpha < 1) {
            throw new NumberIsTooSmallException(
                    LocalizedFormats.CANNOT_COMPUTE_BETA_DENSITY_AT_0_FOR_SOME_ALPHA, alpha, 1, false);
        }
        return 0;
    } else if (x == 1) {
        if (beta < 1) {
            throw new NumberIsTooSmallException(LocalizedFormats.CANNOT_COMPUTE_BETA_DENSITY_AT_1_FOR_SOME_BETA,
                    beta, 1, false);
        }
        return 0;
    } else {
        double logX = FastMath.log(x);
        double log1mX = FastMath.log1p(-x);
        return FastMath.exp((alpha - 1) * logX + (beta - 1) * log1mX - z);
    }
}

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