<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello,<div> I defined a variable p whose x , y and z dimensions are fixed, but t and e dimension are varied. How can I extract the values say at (t=10, e=3) and (t=15, e=20). I tried to use 'q defval' commands twice. The result are the same even before the first 'q defval' command, I issued the commands 'set t 10' and 'set e 3). Before the second 'q defval' command, I issued 'set t 15' and 'set e 20.</div><div><br></div><div><br></div><div><br></div><br><br><div> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">Dr. Hai-Ru Chang</font></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">School of Earth and Atmospheric Sciences</font></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">Georgia Institute of Technology</font></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><font face="Helvetica" size="3" style="font: 12.0px Helvetica">Atlanta, GA 30332-0340</font></p> <p style="margin: 0.0px 0.0px 0.0px 0.0px"><br></p> </div><br></body></html>