Example usage for java.lang Double NaN

Introduction

In this page you can find the example usage for java.lang Double NaN.

Prototype

double NaN

To view the source code for java.lang Double NaN.

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Document

A constant holding a Not-a-Number (NaN) value of type double .

Usage

From source file:Util.java

public static final double[] interpLinear(double[] x, double[] y, double[] xi) throws IllegalArgumentException {

    if (x.length != y.length) {
        throw new IllegalArgumentException("X and Y must be the same length");
    }//from w w  w.  j  a v a  2  s  . c o  m
    if (x.length == 1) {
        throw new IllegalArgumentException("X must contain more than one value");
    }
    double[] dx = new double[x.length - 1];
    double[] dy = new double[x.length - 1];
    double[] slope = new double[x.length - 1];
    double[] intercept = new double[x.length - 1];

    // Calculate the line equation (i.e. slope and intercept) between each point
    for (int i = 0; i < x.length - 1; i++) {
        dx[i] = x[i + 1] - x[i];
        if (dx[i] == 0) {
            throw new IllegalArgumentException("X must be montotonic. A duplicate " + "x-value was found");
        }
        if (dx[i] < 0) {
            throw new IllegalArgumentException("X must be sorted");
        }
        dy[i] = y[i + 1] - y[i];
        slope[i] = dy[i] / dx[i];
        intercept[i] = y[i] - x[i] * slope[i];
    }

    // Perform the interpolation here
    double[] yi = new double[xi.length];
    for (int i = 0; i < xi.length; i++) {
        if ((xi[i] > x[x.length - 1]) || (xi[i] < x[0])) {
            yi[i] = Double.NaN;
        } else {
            int loc = Arrays.binarySearch(x, xi[i]);
            if (loc < -1) {
                loc = -loc - 2;
                yi[i] = slope[loc] * xi[i] + intercept[loc];
            } else {
                yi[i] = y[loc];
            }
        }
    }

    return yi;
}

From source file:com.rapidminer.tools.expression.internal.function.trigonometric.ArcHyperbolicSine.java

@Override
protected double compute(double value) {
    return Double.isNaN(value) ? Double.NaN : FastMath.asinh(value);
}

From source file:com.rapidminer.tools.expression.internal.function.trigonometric.ArcHyperbolicCosine.java

@Override
protected double compute(double value) {
    return Double.isNaN(value) ? Double.NaN : FastMath.acosh(value);
}

From source file:com.rapidminer.tools.expression.internal.function.trigonometric.ArcHyperbolicTangent.java

@Override
protected double compute(double value) {
    return Double.isNaN(value) ? Double.NaN : FastMath.atanh(value);
}

From source file:com.cloudera.oryx.common.stats.IntegerWeightedMean.java

public IntegerWeightedMean() {
    this(0, 0, Double.NaN);
}

From source file:info.debatty.jinu.SummaryStatistics.java

private static double calcMeanCI(final SummaryStatistics stats, final double level) {

    try {/*from  w  w w.j a  va  2  s  .  c  o m*/
        // Create T Distribution with N-1 degrees of freedom
        TDistribution t_dist = new TDistribution(stats.getN() - 1);
        // Calculate critical value
        double crit_val = t_dist.inverseCumulativeProbability(1.0 - (1 - level) / 2);
        // Calculate confidence interval
        return crit_val * stats.getStandardDeviation() / Math.sqrt(stats.getN());
    } catch (MathIllegalArgumentException e) {
        return Double.NaN;
    }
}

From source file:org.hawkular.alerts.api.model.condition.ThresholdConditionEval.java

public ThresholdConditionEval() {
    super(Type.THRESHOLD, false, 0, null);
    this.value = Double.NaN;
}

From source file:MathUtil.java

/** Arcus cos */
static public double acos(double x) {
    double f = asin(x);
    if (f == Double.NaN) {
        return f;
    }/*w w  w.  j  a va  2 s  .  c om*/
    return Math.PI / 2 - f;
}

From source file:Float11.java

static public double acos(double x) {
    double f = asin(x);
    if (f == Double.NaN)
        return f;
    return Math.PI / 2 - f;
}

From source file:de.bund.bfr.math.MathUtils.java

public static double nullToNan(Double d) {
    return d != null ? d : Double.NaN;
}