JAMA (numerical linear algebra library)

<h2 id="functionality">Functionality</h2>
<p>The main capabilities provided by JAMA are:
</p>
<ul><li><a href="/facts/Eigensystem/8TjEoT8u">Eigensystem</a> solving</li>
<li><a href="/facts/LU_decomposition/M13Ew8RD">LU decomposition</a></li>
<li><a href="/facts/Singular_value_decomposition/8t3v6wk3">Singular value decomposition</a></li>
<li><a href="/facts/QR_decomposition/NswfKLGY">QR decomposition</a></li>
<li><a href="/facts/Cholesky_decomposition/Q3IjkuTs">Cholesky decomposition</a></li></ul>
<p>Versions exist for both <a href="/facts/C%252B%252B/Et0F2qn9">C++</a> and the <a href="/facts/Java_programming_language/9ScgFyAL">Java programming language</a>. The C++ version uses the <a href="/facts/Template_Numerical_Toolkit/AJ0djgzI">Template Numerical Toolkit</a> for lower-level operations.  The Java version provides the lower-level operations itself.  
</p>
<h2 id="history">History</h2>
<p>As work of US governmental organization the algorithm and <a href="/facts/Source_code/o9J6Jv23">source code</a> have been released to the <a href="/facts/Public_domain/YWKMDKw4">public domain</a> around 1998.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a> JAMA has had little development since the year 2000,<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> with only the occasional bug fix being released. The project's webpage contains the following statement, <i>"(JAMA) is no longer actively developed to keep track of evolving usage patterns in the Java language, nor to further improve the API. We will, however, fix outright errors in the code."</i> <a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> The last bug fix was released November 2012, with the previous one being released in 2005.
</p>
<h2 id="usage-example">Usage Example</h2>
<p>Example of Singular Value Decomposition (SVD):
</p>
SingularValueDecomposition s = matA.svd();

Matrix U = s.getU();
Matrix S = s.getS();
Matrix V = s.getV();

<p>Example of matrix multiplication:
</p>
Matrix result = A.times(B);

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/List_of_numerical_libraries/p5kgpwob">List of numerical libraries</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="http://math.nist.gov/tnt/download.html">JAMA/C++ download and documentation page</a> at NIST</li>
<li><a href="http://math.nist.gov/javanumerics/jama/">JAMA/Java homepage</a> at NIST</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>JAMA : A Java Matrix Package on math.nist.gov <a href="http://math.nist.gov/javanumerics/jama/" target="_blank">http://math.nist.gov/javanumerics/jama/</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>"JAMA Change Log". JAMA. NIST. November 8, 2012. Retrieved November 30, 2012. <a href="http://math.nist.gov/javanumerics/jama/ChangeLog" target="_blank">http://math.nist.gov/javanumerics/jama/ChangeLog</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>"JAMA Project Page". JAMA. NIST. Retrieved November 30, 2012. <a href="http://math.nist.gov/javanumerics/jama/" target="_blank">http://math.nist.gov/javanumerics/jama/</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
</ol>

JAMA (numerical linear algebra library) open-in-new

JAMA (numerical linear algebra library)