<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'><b><br> On Date: Wed, 9 Oct 2013 09:34:47 -0700<br></b><div><b>> Hi Uzair,<br>> <br>> I think you want to set t to 1 and use the sum command:<br>> sum(pr,t=1,t=4)<br>> http://www.iges.org/grads/gadoc/gradfuncsum.html<br>> <br>> 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 & Technology</b><br><b>Karachi, Pakistan</b><br><br><br></div>                                            </div></body>
</html>