Java LocalizedFormats.START_POSITION属性代码示例

/**
 * Set the data array.  The input array is copied, not referenced.
 *
 * @param values data array to store
 * @param begin the index of the first element to include
 * @param length the number of elements to include
 * @throws MathIllegalArgumentException if values is null or the indices
 * are not valid
 * @see #evaluate()
 */
public void setData(final double[] values, final int begin, final int length)
throws MathIllegalArgumentException {
    if (values == null) {
        throw new NullArgumentException(LocalizedFormats.INPUT_ARRAY);
    }

    if (begin < 0) {
        throw new NotPositiveException(LocalizedFormats.START_POSITION, begin);
    }

    if (length < 0) {
        throw new NotPositiveException(LocalizedFormats.LENGTH, length);
    }

    if (begin + length > values.length) {
        throw new NumberIsTooLargeException(LocalizedFormats.SUBARRAY_ENDS_AFTER_ARRAY_END,
                                            begin + length, values.length, true);
    }
    storedData = new double[length];
    System.arraycopy(values, begin, storedData, 0, length);
}
 

/**
 * This method is used
 * to verify that the input parameters designate a subarray of positive length.
 * <p>
 * <ul>
 * <li>returns <code>true</code> iff the parameters designate a subarray of
 * non-negative length</li>
 * <li>throws <code>IllegalArgumentException</code> if the array is null or
 * or the indices are invalid</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 begin index of the first array element to include
 * @param length the number of elements to include
 * @param allowEmpty if <code>true</code> then zero length arrays are allowed
 * @return true if the parameters are valid
 * @throws MathIllegalArgumentException if the indices are invalid or the array is null
 * @since 3.3
 */
public static boolean verifyValues(final double[] values, final int begin,
        final int length, final boolean allowEmpty) throws MathIllegalArgumentException {

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

    if (begin < 0) {
        throw new NotPositiveException(LocalizedFormats.START_POSITION, Integer.valueOf(begin));
    }

    if (length < 0) {
        throw new NotPositiveException(LocalizedFormats.LENGTH, Integer.valueOf(length));
    }

    if (begin + length > values.length) {
        throw new NumberIsTooLargeException(LocalizedFormats.SUBARRAY_ENDS_AFTER_ARRAY_END,
                Integer.valueOf(begin + length), Integer.valueOf(values.length), true);
    }

    if (length == 0 && !allowEmpty) {
        return false;
    }

    return true;

}
 

/**
 * Returns the sample mode(s).  The mode is the most frequently occurring
 * value in the sample. If there is a unique value with maximum frequency,
 * this value is returned as the only element of the output array. Otherwise,
 * the returned array contains the maximum frequency elements in increasing
 * order.  For example, if {@code sample} is {0, 12, 5, 6, 0, 13, 5, 17},
 * the returned array will have length two, with 0 in the first element and
 * 5 in the second.
 *
 * <p>NaN values are ignored when computing the mode - i.e., NaNs will never
 * appear in the output array.  If the sample includes only NaNs or has
 * length 0, an empty array is returned.</p>
 *
 * @param sample input data
 * @param begin index (0-based) of the first array element to include
 * @param length the number of elements to include
 *
 * @return array of array of the most frequently occurring element(s) sorted in ascending order.
 * @throws MathIllegalArgumentException if the indices are invalid or the array is null
 * @since 3.3
 */
public static double[] mode(double[] sample, final int begin, final int length) {
    if (sample == null) {
        throw new NullArgumentException(LocalizedFormats.INPUT_ARRAY);
    }

    if (begin < 0) {
        throw new NotPositiveException(LocalizedFormats.START_POSITION, Integer.valueOf(begin));
    }

    if (length < 0) {
        throw new NotPositiveException(LocalizedFormats.LENGTH, Integer.valueOf(length));
    }

    return getMode(sample, begin, length);
}