java - 如何从 Hashmap Java 计算总数

Question

我有这个当前输出:

First clusters: [[1, 0, 0, 0, 0], [1, 1, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 1], [0, 0, 0, 1, 1]]  

0 : 4, Probability: 0.8 , logVal: -0.2575424759098898
1 : 1, Probability: 0.2 , logVal: -0.46438561897747244

0 : 3, Probability: 0.6 , logVal: -0.44217935649972373
1 : 2, Probability: 0.4 , logVal: -0.5287712379549449

0 : 5, Probability: 1.0 , logVal: 0.0

0 : 4, Probability: 0.8 , logVal: -0.2575424759098898
1 : 1, Probability: 0.2 , logVal: -0.46438561897747244

0 : 3, Probability: 0.6 , logVal: -0.44217935649972373
1 : 2, Probability: 0.4 , logVal: -0.5287712379549449

然后对于每个 logVal 我想对它们进行总计，例如:
第一个数据:

0 : 4, Probability: 0.8 , logVal: -0.2575424759098898  
1 : 1, Probability: 0.2 , logVal: -0.46438561897747244  

total[0] = (-0.2575424759098898) + (-0.46438561897747244)

接下来，对于第二个数据:

0 : 3, Probability: 0.6 , logVal: -0.44217935649972373  
1 : 2, Probability: 0.4 , logVal: -0.5287712379549449

total[1] = (-0.44217935649972373) + (-0.5287712379549449)

依此类推，直到最后一个数据。但我不知道如何获取每个数据的索引，以便每个数据 logVal 可以使用 HashMap 汇总在一起。

这是我到目前为止的代码:

public static void printCount(HashMap<String, Integer> countMap, int length) {
    double logVal = 0.0, entropy = 0.0, probability = 0.0;

    Set<String> keySet = countMap.keySet();

    for (String bit : keySet) {
        //System.out.println(bit + " : " + countMap.get(bit));

        probability = (double)countMap.get(bit)/length;

        logVal = (probability*(Math.log(probability)/Math.log(2)));

        System.out.println(bit + " : " + countMap.get(bit) + ", Probability: " + probability + " , logVal: " + logVal);

        total = logVal + logVal;

        System.out.println("Total = " + total);

    }

    System.out.println();

}

Answer 1

更改:

total = logVal + logVal;
System.out.println("Total = " + total);

由

String totalString = "(" + logVal + ") + (" + logVal ")";
System.out.println("Total = " + totalString);

如果您需要存储它(您编写了total[0] = ...，只需使用String[]总计。