Apache Commons Math SpearmansCorrelation - 如何使用

Question

我正在尝试使用Apache Commons Math's SpearmansCorrelation，但我遇到了一些困难，因为我没有足够的数学/统计学背景。

我从以下方面研究了 Spearman 的等级相关性：

• https://statistics.laerd.com/statistical-guides/spearmans-rank-order-correlation-statistical-guide-2.php
• http://geographyfieldwork.com/SpearmansRank.htm

我找到了以下例子：

• http://www.devdaily.com/java/jwarehouse/commons-math/src/main/java/org/apache/commons/math/stat/correlation/SpearmansCorrelation.java.shtml
• http://www.devdaily.com/java/jwarehouse/commons-math/src/test/java/org/apache/commons/math/stat/correlation/SpearmansRankCorrelationTest.java.shtml
• http://www.androidadb.com/class/na/NaturalRanking.html

我想计算我班级的两个列表之间的相关性：

public class TestClass{
    int rank; // there may be two or more classes with the same rank - will need an averaging ties strategy
}

从中我得出以下结论：

NaturalRanking naturalRanking = new NaturalRanking(NaNStrategy.FIXED,
        TiesStrategy.AVERAGE);

RealMatrix dataMatrix= createRealMatrix(double[], int, int); // what do I need this matrix for and what parameters do I need to pass?

SpearmansCorrelation sc = SpearmansCorrelation(dataMatrix, naturalRanking);
sc.correlation(double[],double[]);// I have to convert my class into a list of doubles? How? 

Answer 1

对于the link you provided 中的示例，您只需：

new SpearmansCorrelation().correlation(mathsList,englishList);

默认情况下，该课程将平均平局。