Java Number Range Create range(double[] data, int to, int stride, int numElementsEachStride)

Description

Returns a subset of an array from 0 to "to" using the specified stride

License

Apache License

Parameter

Parameter	Description
data	the data to getFromOrigin a subset of
to	the end point of the data
stride	the stride to go through the array
numElementsEachStride	the number of elements to collect at each stride

Return

the subset of the data specified

Declaration

public static double[] range(double[] data, int to, int stride, int numElementsEachStride) 

Method Source Code

//package com.java2s;
/*/*from www .ja va  2 s  .  c  o  m*/
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *    Unless required by applicable law or agreed to in writing, software
 *  *    distributed under the License is distributed on an "AS IS" BASIS,
 *  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *    See the License for the specific language governing permissions and
 *  *    limitations under the License.
 *
 *
 */

public class Main {
    /**
     * Returns a subset of an array from 0 to "to"
     *
     * @param data the data to getFromOrigin a subset of
     * @param to   the end point of the data
     * @return the subset of the data specified
     */
    public static double[] range(double[] data, int to) {
        return range(data, to, 1);
    }

    /**
     * Returns a subset of an array from 0 to "to"
     * using the specified stride
     *
     * @param data   the data to getFromOrigin a subset of
     * @param to     the end point of the data
     * @param stride the stride to go through the array
     * @return the subset of the data specified
     */
    public static double[] range(double[] data, int to, int stride) {
        return range(data, to, stride, 1);
    }

    /**
     * Returns a subset of an array from 0 to "to"
     * using the specified stride
     *
     * @param data                  the data to getFromOrigin a subset of
     * @param to                    the end point of the data
     * @param stride                the stride to go through the array
     * @param numElementsEachStride the number of elements to collect at each stride
     * @return the subset of the data specified
     */
    public static double[] range(double[] data, int to, int stride, int numElementsEachStride) {
        double[] ret = new double[to / stride];
        if (ret.length < 1)
            ret = new double[1];
        int count = 0;
        for (int i = 0; i < data.length; i += stride) {
            for (int j = 0; j < numElementsEachStride; j++) {
                if (i + j >= data.length || count >= ret.length)
                    break;
                ret[count++] = data[i + j];
            }
        }
        return ret;
    }

    /**
     * Generate an int array ranging from
     * from to to.
     * if from is > to this method will
     * count backwards
     *
     * @param from      the from
     * @param to        the end point of the data
     * @param increment the amount to increment by
     * @return the int array with a length equal to absoluteValue(from - to)
     */
    public static int[] range(int from, int to, int increment) {
        int diff = Math.abs(from - to);
        int[] ret = new int[diff / increment];
        if (ret.length < 1)
            ret = new int[1];

        if (from < to) {
            int count = 0;
            for (int i = from; i < to; i += increment) {
                if (count >= ret.length)
                    break;
                ret[count++] = i;
            }
        } else if (from > to) {
            int count = 0;
            for (int i = from - 1; i >= to; i -= increment) {
                if (count >= ret.length)
                    break;
                ret[count++] = i;
            }
        }

        return ret;
    }

    /**
     * Generate an int array ranging from
     * from to to.
     * if from is > to this method will
     * count backwards
     *
     * @param from the from
     * @param to   the end point of the data
     * @return the int array with a length equal to absoluteValue(from - to)
     */
    public static int[] range(int from, int to) {
        if (from == to)
            return new int[0];
        return range(from, to, 1);
    }
}

Related

1. range(double a, double b, double step)
2. range(double value1, double value2)
3. range(double[] min, double[] max, double[] min2, double[] max2)
4. range(double[] vals)
5. range(final int max)
6. range(float number, float value, float range)