Java中的相对频率 [英] Relative frequency in java

问题描述

我想创建一个程序来帮助我进行统计，但是从一开始我就遇到了问题，并且我正陷入混乱，无法计算只有一个维度的随机数数组的相对频率.

I want to create a program to help me with the statistics, but I'm having problems from the beginning and I'm making a huge mess to calculate the relative frequency of an array with random numbers and only one dimension.

例如，生成这些数字:

{3，5，5，2，4，1，3，5，4}

{3, 5, 5, 2, 4, 1, 3, 5, 4}

我希望程序告诉我3重复2次，4 3次，5 5次

I want that the program tell me that the 3 is repeated 2 times, the 4 3 times and 5 5 times

我创建了一个类来对这些值进行排序以计算中位数，第一和第三四分位数，但我仍然不知道如何找到频率以计算其他值

I've created a class to sort these values ​​in order to calculate the median, the first and third quartile, but I still do not know how to find the frequency in order to calculate other values

感谢您的时间

PS:不知道这是否会影响任何东西，但我使用的是 netbeans

PS: Do not know if this affects anything but I'm using netbeans

推荐答案

您正在确定是否要寻找它:

You are looking for this for sure: Collections: frequency

如果没有集合，请先将数组转换为列表:

If you dont have a Collection, convert your array to list first:

Collections.frequency(Arrays.asList(yourArray), new Integer(3))

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