根據數組數據源統計出量化級數爲m的直方圖數組
public class CMath { private CMath() {} /** * Statistical histogram. * * @param arr value array * @param m quantization level * @return histogram */ public static int[] histogram(int[] arr, int m) { int[] result = new int[m]; for (int i: arr) { if (i < m) result[i]++; } return result; } }