Java的矩阵库Java的矩阵库(Java matrix libraries)

我想知道是否有任何知名的矩阵库为Java，如柯尔特或EJML的，实际上提供了类似的功能MatLab的？ 举例来说，我似乎无法在他们的API简单的方法的定义中对方，这似乎是最常用的操作，增加或减去两个矩阵/矢量任何地方。 我缺少的东西吗？

Answer 1:

尝试阿帕奇共享数学库。 org.apache.commons.math3.linear包中包含所需的功能。 主页

Answer 2:

Some Java libraries for linear algebra are:

• Apache Commons Math: http://commons.apache.org/proper/commons-math/
• jeigen - a wrapper for eigen - https://github.com/hughperkins/jeigen (includes complex and rarely found feature like matrix exponential and matrix logarithm)
• jblas http://mikiobraun.github.io/jblas/ (also features more complex functions like matrix exponential, also very fast).
• Colt http://acs.lbl.gov/software/colt/
• JAMA http://math.nist.gov/javanumerics/jama/
• UJMP - http://sourceforge.net/projects/ujmp/

EDIT maybe we can extend this list whenever one comes across and you know - the world keeps moving:

• ojAlgo - http://ojalgo.org/ has promising benchmarks
• Efficient Java Matrix Library (EJML) - http://ejml.org
• ParallelColt - https://sites.google.com/site/piotrwendykier/software/parallelcolt
• la4j - http://la4j.org/
• MTJ - https://github.com/fommil/matrix-toolkits-java
• nd4j - https://nd4j.org/ lets you choose underlying native implementations like cuda or openBlas

Note: Personally: I use Apache Commons Math and Colt in my own project (http://www.finmath.net). While commons math is actively developed, I found that Colt is still faster in some tasks (like Eigenvalue decomposition). For that reason I use some kind of wrapper which allows me to quickly switch the underlying library (I only need a few things like solving systems of equations and Eigenvalue decomposition).

Answer 3:

对于COLT接口给你的通用OP： assign(matrix, function) ，它可用来添加或减去矩阵和向量。

由于Javadoc文档assign()说：

分配的功能到每个单元的结果; x[row,col] =function(x[row,col],y[row,col])

因此，通过使用加功能使用function -您可以添加矩阵。

Answer 4:

还有la4j支持的函数编程功能的仿函数库。 您可以使用变换（）方法手动喜阶功能。

Answer 5:

您可以使用这一个 。 这是非常简单，提供基本的矩阵运算。

您可以添加/。减去/乘等二维矩阵，向量。

文章来源: Java matrix libraries