In statistics, the Pearson product-moment correlation coefficient (sometimes referred to as the PMCC, and typically denoted by r) is a measure of the correlation (linear dependence) between two variables X and Y, giving a value between +1 and −1 inclusive.
/**
* calculate Pearson product-moment correlation [...]
Normalization is any process that makes something more normal.
/**
* @param point1 first point
* @param point2 second point
* @return the normalization Euclidean distance of two points
*/
public [...]
In mathematics, the Euclidean distance or Euclidean metric is the “ordinary” distance between two points that one would measure with a ruler, and is given by the Pythagorean formula.
/**
* @param point1 first point
* @param point2 second [...]
The normal distribution or Gaussian distribution is a continuous probability distribution that often gives a good description of data that cluster around the mean.
/**
* The aim of this static method is to implememnt the function of Gaussian distribution
* [...]
In linear algebra, Gaussian elimination is an algorithm for solving systems of linear equations, finding the rank of a matrix, and calculating the inverse of an invertible square matrix.
Gauss-Jordan Elimination is a variant of Gaussian Elimination.
package org.javaresources.math.matrix;
/**
* Created by IntelliJ IDEA.
* User: glen
* Date: 2010-3-29
* Time: 20:10:28
*
*/
public class MatrixUtil [...]
Java Database Connectivity (JDBC) is an API that lets you access any tabular data sources from a Java application.
This example shows a JSP that queries a UserInfo table using JDBC.
Name
password
public static Connection getConnection() throws Exception {
String driver = “com.mysql.jdbc.Driver”;
String url = “jdbc:mysql://localhost/ev?”;
String username = “root”;
String password = “0532″;
Class.forName(driver); // load Oracle driver
return DriverManager.getConnection(url, username, password);
}
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