Hi Peng,<br><br>Check the functions param3d and param3d1.<br><br>param3d will plot a trio of vectors (x, y and z) as line, as a series of points or a combination of both<br><br>param3d1 will take a trio of matrices and plot the columns as vectors.<br>
<br>Check the help file for both to learn how to use them.<br><br>Regards,<br>Petar Knezevich<br><br><div class="gmail_quote">On 8 July 2010 01:45, Peng Du <span dir="ltr"><<a href="mailto:eddy.pdu@gmail.com">eddy.pdu@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Thanks very much Mathieu.<div><br></div><div><div>Another question: how can I plot3d three vectors without any logical relationships? For example, there is no f(x,y)=z.</div>
<div><br></div><div>Many thanks.</div><div><br></div><font color="#888888"><div>Peng<br></div></font></div></blockquote></div>