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<body class='hmmessage'><div dir='ltr'><b><br>&nbsp; On Date: Wed, 9 Oct 2013 09:34:47 -0700<br></b><div><b>&gt; Hi Uzair,<br>&gt; <br>&gt; I think you want to set t to 1 and use the sum command:<br>&gt; sum(pr,t=1,t=4)<br>&gt; http://www.iges.org/grads/gadoc/gradfuncsum.html<br>&gt; <br>&gt; Andrew</b><br><br><br>THANK YOU BROTHER.....<br><br><br><br><b>Best regards<br><br>Uzair Mannan<br>Cell: +923323489950<br>NED University of Engineering &amp; Technology</b><br><b>Karachi, Pakistan</b><br><br><br></div>                                               </div></body>
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