"User Guide for The Commons Math Extensions Framework in Java Class Libraries)
"Commons Math Extensions Framework Guide in Java Library"
introduction:
Commons Math Extensions framework is one of the mathematical libraries commonly used in Java, providing many expansion functions for scientific computing and mathematical modeling.This article will introduce the basic usage and common examples of the Commons Math Extensions framework.
1. Introduce dependencies
In the pom.xml file of the project, the dependency item of adding the Commons Math Extensions framework:
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>3.6</version>
</dependency>
2. Use examples
2.1 mathematical function
The Commons Math Extensions framework provides the implementation of various mathematical functions, allowing us to easily perform various mathematical computing.The following are examples of some common mathematical functions:
import org.apache.commons.math3.special.*;
import org.apache.commons.math3.util.*;
public class MathFunctionsExample {
public static void main(String[] args) {
// Calculate the square root
double squareRoot = FastMath.sqrt(16.0);
System.out.println ("square root:" + squareroot);
// Calculating index
double exponential = FastMath.exp(2.0);
System.out.println ("index:" + exponental);
// Calculate the number
double logarithm = FastMath.log(10.0);
System.out.println ("Dive:" + Logarithm);
// Calculate the triangle function
double sine = FastMath.sin(FastMath.PI / 2);
System.out.println ("Sine Ring:" + SINE);
}
}
2.2 matrix operation
Commons Math Extensions framework also provides a matrix tool class, which is convenient for us to perform linear algebraic calculations.The following is a simple matrix operation example:
import org.apache.commons.math3.linear.*;
public class MatrixOperationsExample {
public static void main(String[] args) {
// Definition matrix
RealMatrix matrixA = MatrixUtils.createRealMatrix(new double[][]{{1, 2}, {3, 4}});
RealMatrix matrixB = MatrixUtils.createRealMatrix(new double[][]{{5, 6}, {7, 8}});
// matrix plus
RealMatrix sum = matrixA.add(matrixB);
System.out.println ("matrix plus:" + SUM);
// matrix multiplication
RealMatrix product = matrixA.multiply(matrixB);
System.out.println ("Matrix multiplication:" + Product);
}
}
in conclusion:
This article introduces the basic usage guide of the Commons Math Extensions framework in the Java class library, and provides example code for mathematical functions and matrix operations.By learning and using the Commons Math Extensions framework, we can more conveniently perform mathematical computing and mathematical modeling to improve our programming efficiency.
