Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!brutus.cs.uiuc.edu!psuvax1!psuvm!ysub!tcint020 From: TCINT020@ysub.ysu.edu (Robert Noe) Newsgroups: comp.sys.handhelds Subject: Re: HP48sx weirdness Message-ID: <90124.160331TCINT020@ysub.ysu.edu> Date: 4 May 90 20:03:31 GMT References: <8927@hydra.gatech.EDU> Organization: Youngstown State University VM system (YSUB) Lines: 12 This has happened to me as well and this is the reason that I came up with to explain it. CAT wont recognize variables that are just numbers as equations. Since we are putting just a number on the stack and telling the HP that we want to plot it they needed some way to notify CAT that it was an equation and not just any old variable hence the .EQ that gets put at the end of the variable name that you enter. I havent found this documented anywhere but thats just what I think. Hope this helps or is at least close to correct! Bob