依赖 lib:
<dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-math3</artifactId> <version>3.1.1</version> </dependency>
两个数组就计算其相关系数:
PearsonsCorrelation t=new PearsonsCorrelation(); RealMatrix matrix=new Array2DRowRealMatrix(3,2); RealVector vector=new ArrayRealVector(2); vector.setEntry(0,1.0); vector.setEntry(1,2.0); RealVector vector1=new ArrayRealVector(2); vector1.setEntry(0,20); vector1.setEntry(1,10); RealVector vector2=new ArrayRealVector(2); vector2.setEntry(0,100); vector2.setEntry(1,200); matrix.setRowVector(0, vector); matrix.setRowVector(1, vector1); matrix.setRowVector(2, vector2); double p=t.correlation(vector.toArray(),vector1.toArray()); System.out.println(p);