129 lines
4.9 KiB
HTML
129 lines
4.9 KiB
HTML
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<head>
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<title>The GNU Fortran Compiler: MATMUL</title>
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="MATMUL"></a>
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<div class="header">
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<p>
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Next: <a href="MAX.html#MAX" accesskey="n" rel="next">MAX</a>, Previous: <a href="MASKR.html#MASKR" accesskey="p" rel="prev">MASKR</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="MATMUL-_002d_002d_002d-matrix-multiplication"></a>
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<h3 class="section">9.179 <code>MATMUL</code> — matrix multiplication</h3>
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<a name="index-MATMUL"></a>
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<a name="index-matrix-multiplication"></a>
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<a name="index-product_002c-matrix"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>Performs a matrix multiplication on numeric or logical arguments.
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</p>
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</dd>
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<dt><em>Standard</em>:</dt>
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<dd><p>Fortran 95 and later
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</p>
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</dd>
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<dt><em>Class</em>:</dt>
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<dd><p>Transformational function
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><p><code>RESULT = MATMUL(MATRIX_A, MATRIX_B)</code>
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</p>
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</dd>
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<dt><em>Arguments</em>:</dt>
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<dd><table>
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<tr><td width="15%"><var>MATRIX_A</var></td><td width="70%">An array of <code>INTEGER</code>,
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<code>REAL</code>, <code>COMPLEX</code>, or <code>LOGICAL</code> type, with a rank of
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one or two.</td></tr>
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<tr><td width="15%"><var>MATRIX_B</var></td><td width="70%">An array of <code>INTEGER</code>,
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<code>REAL</code>, or <code>COMPLEX</code> type if <var>MATRIX_A</var> is of a numeric
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type; otherwise, an array of <code>LOGICAL</code> type. The rank shall be one
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or two, and the first (or only) dimension of <var>MATRIX_B</var> shall be
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equal to the last (or only) dimension of <var>MATRIX_A</var>.</td></tr>
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</table>
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</dd>
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<dt><em>Return value</em>:</dt>
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<dd><p>The matrix product of <var>MATRIX_A</var> and <var>MATRIX_B</var>. The type and
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kind of the result follow the usual type and kind promotion rules, as
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for the <code>*</code> or <code>.AND.</code> operators.
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</p>
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</dd>
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<dt><em>See also</em>:</dt>
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</dl>
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