<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">Hello Claus,<br>
<br>
plot3d3() may be used for this kind of plot. It is even its main
asset, despites it is not highlighted in its documentation. Here
is an enriched version of its example, and its rendering:<br>
<br>
<pre style="font-family:Monospaced;font-style:normal;font-size:12.0;"><span style="color:rgb(0,0,0);">u</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(0,0,0);">linspace</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(92,92,92);">-</span><span style="color:rgb(218,112,214);">%pi</span><span style="color:rgb(92,92,92);">/</span><span style="color:rgb(188,143,143);">2</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(218,112,214);">%pi</span><span style="color:rgb(92,92,92);">/</span><span style="color:rgb(188,143,143);">2</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(188,143,143);">30</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">v</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(0,0,0);">linspace</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">0</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(188,143,143);">2</span><span style="color:rgb(92,92,92);">*</span><span style="color:rgb(218,112,214);">%pi</span><span style="color:rgb(0,0,0);">,</span> <span style="color:rgb(188,143,143);">30</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">X</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(50,185,185);">cos</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">u</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(92,92,92);">'</span><span style="color:rgb(92,92,92);">*</span><span style="color:rgb(50,185,185);">cos</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">v</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">Y</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(50,185,185);">cos</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">u</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(92,92,92);">'</span><span style="color:rgb(92,92,92);">*</span><span style="color:rgb(50,185,185);">sin</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">v</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">Z</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(50,185,185);">sin</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">u</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(92,92,92);">'</span><span style="color:rgb(92,92,92);">*</span><span style="color:rgb(50,185,185);">ones</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">v</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">clf</span>
<span style="color:rgb(0,0,0);">subplot</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">1</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(188,143,143);">3</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(188,143,143);">1</span><span style="color:rgb(74,85,219);">)</span>
<span style="color:rgb(0,0,0);">plot3d3</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">X</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0);">Y</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0);">Z</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">subplot</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">1</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(188,143,143);">3</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(188,143,143);">2</span><span style="color:rgb(74,85,219);">)</span>
<span style="color:rgb(0,0,0);">plot3d3</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">X</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0);">Y</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0);">Z</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">ax</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(0,0,0);">gca</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">ax</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">children</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">1</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">visible</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(188,143,143);">"</span><span style="color:rgb(188,143,143);">off</span><span style="color:rgb(188,143,143);">"</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">ax</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">children</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">2</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">children</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">foreground</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(50,185,185);">color</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">"</span><span style="color:rgb(188,143,143);">grey70</span><span style="color:rgb(188,143,143);">"</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">subplot</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">1</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(188,143,143);">3</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(188,143,143);">3</span><span style="color:rgb(74,85,219);">)</span>
<span style="color:rgb(0,0,0);">plot3d3</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">X</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0);">Y</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0);">Z</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">ax</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(0,0,0);">gca</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">ax</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">children</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">2</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">visible</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(188,143,143);">"</span><span style="color:rgb(188,143,143);">off</span><span style="color:rgb(188,143,143);">"</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">ax</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">children</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">1</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">children</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">foreground</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(50,185,185);">color</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(188,143,143);">"</span><span style="color:rgb(188,143,143);">orange</span><span style="color:rgb(188,143,143);">"</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">f</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(0,0,0);">gcf</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span>
<span style="color:rgb(0,0,0);">isoview</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">f</span><span style="color:rgb(74,85,219);">)</span>
<span style="color:rgb(0,0,0);">f</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">children</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">rotation_angles</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(74,85,219);">[</span><span style="color:rgb(188,143,143);">50</span> <span style="color:rgb(188,143,143);">20</span><span style="color:rgb(74,85,219);">]</span><span style="color:rgb(0,0,0);">;
<img src="cid:part1.CD2F3C34.401392E0@free.fr" alt="" height="206" width="609">
</span></pre><span style="color:rgb(0,0,0);">As you see, plot3d3() plots two independent sub-lattices that can be controlled independently.
This may be easily applied to your case.
If you don't need one of the sub-lattices, you may even delete it and keep only the other one.
Cheers
Samuel
PS : i will propose an improved page for plot3d3.
</span><span style="color:rgb(0,0,0);"></span></div>
</body></html>