145 lines
5.6 KiB
HTML
145 lines
5.6 KiB
HTML
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<head>
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<title>The GNU Fortran Compiler: CSHIFT</title>
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="CSHIFT"></a>
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<div class="header">
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<p>
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Next: <a href="CTIME.html#CTIME" accesskey="n" rel="next">CTIME</a>, Previous: <a href="CPU_005fTIME.html#CPU_005fTIME" accesskey="p" rel="prev">CPU_TIME</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="CSHIFT-_002d_002d_002d-Circular-shift-elements-of-an-array"></a>
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<h3 class="section">9.73 <code>CSHIFT</code> — Circular shift elements of an array</h3>
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<a name="index-CSHIFT"></a>
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<a name="index-array_002c-shift-circularly"></a>
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<a name="index-array_002c-permutation"></a>
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<a name="index-array_002c-rotate"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p><code>CSHIFT(ARRAY, SHIFT [, DIM])</code> performs a circular shift on elements of
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<var>ARRAY</var> along the dimension of <var>DIM</var>. If <var>DIM</var> is omitted it is
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taken to be <code>1</code>. <var>DIM</var> is a scalar of type <code>INTEGER</code> in the
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range of <em>1 \leq DIM \leq n)</em> where <em>n</em> is the rank of <var>ARRAY</var>.
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If the rank of <var>ARRAY</var> is one, then all elements of <var>ARRAY</var> are shifted
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by <var>SHIFT</var> places. If rank is greater than one, then all complete rank one
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sections of <var>ARRAY</var> along the given dimension are shifted. Elements
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shifted out one end of each rank one section are shifted back in the other end.
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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 = CSHIFT(ARRAY, SHIFT [, DIM])</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>ARRAY</var></td><td width="70%">Shall be an array of any type.</td></tr>
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<tr><td width="15%"><var>SHIFT</var></td><td width="70%">The type shall be <code>INTEGER</code>.</td></tr>
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<tr><td width="15%"><var>DIM</var></td><td width="70%">The type shall be <code>INTEGER</code>.</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>Returns an array of same type and rank as the <var>ARRAY</var> argument.
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</p>
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</dd>
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<dt><em>Example</em>:</dt>
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<dd><div class="smallexample">
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<pre class="smallexample">program test_cshift
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integer, dimension(3,3) :: a
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a = reshape( (/ 1, 2, 3, 4, 5, 6, 7, 8, 9 /), (/ 3, 3 /))
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print '(3i3)', a(1,:)
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print '(3i3)', a(2,:)
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print '(3i3)', a(3,:)
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a = cshift(a, SHIFT=(/1, 2, -1/), DIM=2)
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print *
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print '(3i3)', a(1,:)
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print '(3i3)', a(2,:)
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print '(3i3)', a(3,:)
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end program test_cshift
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</pre></div>
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</dd>
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</dl>
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