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<HTML>
<HEAD>
<TITLE>WRAP</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF" fgcolor="#000000">
<P><A NAME="wrap"></A>
<font size="+3" color="green"><B>WRAP</B></font></P>
<P>
<TABLE border="1" cols="2" frame="box" rules="all" width="572">
<TR>
<TD width="15%" valign="top"><B>Syntax</B>:</TD>
<TD width="85%"><CODE>
matrix = WRAP( matrix, scalar )</CODE>
</TD></TR>
</table></p>
<p>
The <CODE>WRAP</CODE> function only accepts a matrix
as its first argument. It wraps the column elements of a matrix by the
specified step size, the scalar second argument.</p>
<P>
Suppose the step size is <i>n</i>.</P>
<P>
<table>
<tr>
<td valign=top>•</td><td>If <i>n</i> > 0, the column elements of the matrix are
shifted down. The first <i>n</i> elements in the first column are zero filled, then the last
<i>n</i> elements of each column are brought into the next column. The last <i>n</i> elements
in the last column are lost.</td>
</tr><tr>
<td valign=top>•</td><td>If <i>n</i> = 0, the matrix is returned unchanged.</td>
</tr><tr>
<td valign=top>•</td><td>If <i>n</i> < 0, the column elements of the matrix are
shifted up. The first <i>n</i> elements in the first column are lost. The first <i>n</i>
elements of each column are brought into the preceding column. The last <i>n</i> elements in
the last column are zero filled.</td>
</tr></table></P>
<P>
If the step size is not an integer, only the integer part will be used.</P>
<P>
<font size="+1" color="green">Examples</font></P>
<P>
Suppose you have a matrix <CODE>M</CODE><br />
<pre>
| 1 2 3 4 |
M = | 5 6 7 8 |
| 9 10 11 12 |
</pre></P>
<P>
<table>
<tr>
<td bgcolor="#FFCCCC"><i>function</i></td><td bgcolor="#FFCCCC"><i>result</i></td>
</tr><tr>
<td valign=middle><CODE><font color="blue">WRAP(M,2)</font></CODE></td>
<td bgcolor="#FFFFCC"><table cellspacing="0"><tr><td><CODE>| 0 5 6 7 |</CODE></td></tr>
<tr><td><CODE>| 0 9 10 11 |</CODE></td></tr>
<tr><td><CODE>| 1 2 3 4 |</CODE></td></tr></table></td>
</tr><tr><tr></td><td></td></tr><tr>
<td valign=middle><CODE><font color="blue">WRAP(M,-2)</font></CODE></td>
<td bgcolor="#FFFFCC"><table cellspacing="0"><tr><td><CODE>| 9 10 11 12 |</CODE></td></tr>
<tr><td><CODE>| 2 3 4 0 |</CODE></td></tr>
<tr><td><CODE>| 6 7 8 0 |</CODE></td></tr></table></td>
</tr></table></P>
<p>
<a href="step.htm"><img align=middle border="0" src="../../shadow_left.gif">
<font size="+1" color="olive">STEP</font></a><br />
<a href="fold.htm"><img align=middle border="0" src="../../shadow_right.gif">
<font size="+1" color="olive">FOLD</font></a>
</P>
</BODY>
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