https://github.com/yannrichet/jmatharray

Basic math in Java
https://github.com/yannrichet/jmatharray

Last synced: 11 days ago
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Basic math in Java

• Host: GitHub
• URL: https://github.com/yannrichet/jmatharray
• Owner: yannrichet
• License: bsd-2-clause
• Created: 2015-03-14T13:20:30.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2021-03-16T17:04:24.000Z (over 3 years ago)
• Last Synced: 2024-10-08T18:06:22.569Z (30 days ago)
• Language: Java
• Homepage:
• Size: 439 KB
• Stars: 2
• Watchers: 3
• Forks: 5
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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# JMathArray: basic math in Java

JMathArray provides classes with static methods for basic math in Java. Random number generations is based on RngPack?, linear algebra is based on Jama.

List of static methods applicable on int and double arrays (double[][]):

* merge, insert, delete rows and columns : org.math.array.DoubleArray, org.math.array.IntegerArray

* simple linear algebra: LU, QR, EigenValues?, Cholesky, SingularValues? (based on JAMA package): org.math.array.LinearAlgebra

* simple statistics: mean, variance, covariance, histograms : org.math.array.StatisticSample

* some random generators (based on RnGPack): normal, lognormal, triangular, chi square, weibull, ... : org.math.array.StatisticSample 

## Example Java code ##

```java

import static org.math.array.LinearAlgebra.*;

...

  // random 4 x 4 matrix + Id

  double[][] A = plus(random(4, 4), identity(4));

                

  // Eigen values Decomposition : A = V * D * V^-1

  EigenvalueDecomposition eig = eigen(A);

  double[][] V = eig.getV();

  double[][] D = eig.getD();

```

JMathArray syntax is stable. Only new features may be added, and current syntax will stay available.

## Use it ##

Put https://github.com/yannrichet/jmatharray/blob/master/dist/jmatharray.jar in your java classpath

Or include maven dependency:

```xml

...

    

      com.github.yannrichet

      jmatharray

      1.0

    

...

```

Then add a static import statement in your class:

```java

import static org.math.array.DoubleArray.*;

import static org.math.array.LinearAlgebra.*;

import static org.math.array.StatisticSample.*;

```

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