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

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LocalizedFormats INFINITE_ARRAY_ELEMENT

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Usage

From source file:org.gitools.analysis.groupcomparison.format.math33Preview.MathArrays.java

/**
 * Normalizes an array to make it sum to a specified value.
 * Returns the result of the transformation
 * <pre>/*from  w w  w . j ava  2  s  .c o  m*/
 *    x |-> x * normalizedSum / sum
 * </pre>
 * applied to each non-NaN element x of the input array, where sum is the
 * sum of the non-NaN entries in the input array.
 * <p/>
 * Throws IllegalArgumentException if {@code normalizedSum} is infinite
 * or NaN and ArithmeticException if the input array contains any infinite elements
 * or sums to 0.
 * <p/>
 * Ignores (i.e., copies unchanged to the output array) NaNs in the input array.
 *
 * @param values        Input array to be normalized
 * @param normalizedSum Target sum for the normalized array
 * @return the normalized array.
 * @throws MathArithmeticException      if the input array contains infinite
 *                                      elements or sums to zero.
 * @throws MathIllegalArgumentException if the target sum is infinite or {@code NaN}.
 * @since 2.1
 */
public static double[] normalizeArray(double[] values, double normalizedSum)
        throws MathIllegalArgumentException, MathArithmeticException {
    if (Double.isInfinite(normalizedSum)) {
        throw new MathIllegalArgumentException(LocalizedFormats.NORMALIZE_INFINITE);
    }
    if (Double.isNaN(normalizedSum)) {
        throw new MathIllegalArgumentException(LocalizedFormats.NORMALIZE_NAN);
    }
    double sum = 0d;
    final int len = values.length;
    double[] out = new double[len];
    for (int i = 0; i < len; i++) {
        if (Double.isInfinite(values[i])) {
            throw new MathIllegalArgumentException(LocalizedFormats.INFINITE_ARRAY_ELEMENT, values[i], i);
        }
        if (!Double.isNaN(values[i])) {
            sum += values[i];
        }
    }
    if (sum == 0) {
        throw new MathArithmeticException(LocalizedFormats.ARRAY_SUMS_TO_ZERO);
    }
    for (int i = 0; i < len; i++) {
        if (Double.isNaN(values[i])) {
            out[i] = Double.NaN;
        } else {
            out[i] = values[i] * normalizedSum / sum;
        }
    }
    return out;
}

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From source file:org.gitools.analysis.groupcomparison.format.math33Preview.MathArrays.java

/**
 * This method is used//from   ww  w.java 2  s . c  o m
 * to verify that the begin and length parameters designate a subarray of positive length
 * and the weights are all non-negative, non-NaN, finite, and not all zero.
 * <p>
 * <ul>
 * <li>returns <code>true</code> iff the parameters designate a subarray of
 * non-negative length and the weights array contains legitimate values.</li>
 * <li>throws <code>MathIllegalArgumentException</code> if any of the following are true:
 * <ul><li>the values array is null</li>
 * <li>the weights array is null</li>
 * <li>the weights array does not have the same length as the values array</li>
 * <li>the weights array contains one or more infinite values</li>
 * <li>the weights array contains one or more NaN values</li>
 * <li>the weights array contains negative values</li>
 * <li>the start and length arguments do not determine a valid array</li></ul>
 * </li>
 * <li>returns <code>false</li> if the array is non-null, but
 * <code>length</code> is 0 unless <code>allowEmpty</code> is <code>true</code>.
 * </ul></p>
 *
 * @param values     the input array.
 * @param weights    the weights array.
 * @param begin      index of the first array element to include.
 * @param length     the number of elements to include.
 * @param allowEmpty if {@code true} than allow zero length arrays to pass.
 * @return {@code true} if the parameters are valid.
 * @throws NullArgumentException        if either of the arrays are null
 * @throws MathIllegalArgumentException if the array indices are not valid,
 *                                      the weights array contains NaN, infinite or negative elements, or there
 *                                      are no positive weights.
 * @since 3.3
 */
public static boolean verifyValues(final double[] values, final double[] weights, final int begin,
        final int length, final boolean allowEmpty) throws MathIllegalArgumentException {

    if (weights == null || values == null) {
        throw new NullArgumentException(LocalizedFormats.INPUT_ARRAY);
    }

    if (weights.length != values.length) {
        throw new DimensionMismatchException(weights.length, values.length);
    }

    boolean containsPositiveWeight = false;
    for (int i = begin; i < begin + length; i++) {
        final double weight = weights[i];
        if (Double.isNaN(weight)) {
            throw new MathIllegalArgumentException(LocalizedFormats.NAN_ELEMENT_AT_INDEX, Integer.valueOf(i));
        }
        if (Double.isInfinite(weight)) {
            throw new MathIllegalArgumentException(LocalizedFormats.INFINITE_ARRAY_ELEMENT,
                    Double.valueOf(weight), Integer.valueOf(i));
        }
        if (weight < 0) {
            throw new MathIllegalArgumentException(LocalizedFormats.NEGATIVE_ELEMENT_AT_INDEX,
                    Integer.valueOf(i), Double.valueOf(weight));
        }
        if (!containsPositiveWeight && weight > 0.0) {
            containsPositiveWeight = true;
        }
    }

    if (!containsPositiveWeight) {
        throw new MathIllegalArgumentException(LocalizedFormats.WEIGHT_AT_LEAST_ONE_NON_ZERO);
    }

    return verifyValues(values, begin, length, allowEmpty);
}

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