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| <h3 class="section">8.59 <code>CSHIFT</code> — Circular shift elements of an array</h3> |
| |
| <p><a name="index-CSHIFT-559"></a><a name="index-array_002c-shift-circularly-560"></a><a name="index-array_002c-permutation-561"></a><a name="index-array_002c-rotate-562"></a> |
| <dl> |
| <dt><em>Description</em>:<dd><code>CSHIFT(ARRAY, SHIFT [, DIM])</code> performs a circular shift on elements of |
| <var>ARRAY</var> along the dimension of <var>DIM</var>. If <var>DIM</var> is omitted it is |
| taken to be <code>1</code>. <var>DIM</var> is a scalar of type <code>INTEGER</code> in the |
| range of 1 \leq DIM \leq n) where n is the rank of <var>ARRAY</var>. |
| If the rank of <var>ARRAY</var> is one, then all elements of <var>ARRAY</var> are shifted |
| by <var>SHIFT</var> places. If rank is greater than one, then all complete rank one |
| sections of <var>ARRAY</var> along the given dimension are shifted. Elements |
| shifted out one end of each rank one section are shifted back in the other end. |
| |
| <br><dt><em>Standard</em>:<dd>Fortran 95 and later |
| |
| <br><dt><em>Class</em>:<dd>Transformational function |
| |
| <br><dt><em>Syntax</em>:<dd><code>RESULT = CSHIFT(ARRAY, SHIFT [, DIM])</code> |
| |
| <br><dt><em>Arguments</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="15%"><var>ARRAY</var> </td><td valign="top" width="70%">Shall be an array of any type. |
| <br></td></tr><tr align="left"><td valign="top" width="15%"><var>SHIFT</var> </td><td valign="top" width="70%">The type shall be <code>INTEGER</code>. |
| <br></td></tr><tr align="left"><td valign="top" width="15%"><var>DIM</var> </td><td valign="top" width="70%">The type shall be <code>INTEGER</code>. |
| <br></td></tr></table> |
| |
| <br><dt><em>Return value</em>:<dd>Returns an array of same type and rank as the <var>ARRAY</var> argument. |
| |
| <br><dt><em>Example</em>:<dd> |
| <pre class="smallexample"> program test_cshift |
| integer, dimension(3,3) :: a |
| a = reshape( (/ 1, 2, 3, 4, 5, 6, 7, 8, 9 /), (/ 3, 3 /)) |
| print '(3i3)', a(1,:) |
| print '(3i3)', a(2,:) |
| print '(3i3)', a(3,:) |
| a = cshift(a, SHIFT=(/1, 2, -1/), DIM=2) |
| print * |
| print '(3i3)', a(1,:) |
| print '(3i3)', a(2,:) |
| print '(3i3)', a(3,:) |
| end program test_cshift |
| </pre> |
| </dl> |
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