gt3398b@prism.gatech.EDU (DELANO,ANDREW DOUGLAS) (05/04/90)
The other day I was playing around (really just being stupid) and
I noticed something weird. Try this:
1.)put the number 1 (or any number) on the stack.
2.)go into the plot menu (orange/shift -> 8)
3.)press the menu key labeled NEW.
This is where it gets weird (for me anyway). Most of the time, when trying
to plot an equation, you put the equation on the stack, go to the plot
menu, and press NEW. The hp then prompts you to name the equation and
press enter. But when you put just a number on the stack and do this
there is (on my hp) a .EQ already there, and if you press enter, you get
invalid sytax. Maybe I'm in another world but is this supposed to
happen? And if it is, WHY?
Waiting for answer (as usual)
Andy
--
DELANO,ANDREW DOUGLAS
Georgia Institute of Technology, Atlanta Georgia, 30332
uucp: ...!{decvax,hplabs,ncar,purdue,rutgers}!gatech!prism!gt3398b
Internet: gt3398b@prism.gatech.edubillw@hpcvra.CV.HP.COM (William C Wickes) (05/05/90)
Variables are only automatically included in the PLOT/SOLVE CATalog if they contain algebraic objects or the variable name ends in "EQ". When you ask NEW to store a non-algebraic object, it "helps" you get it into the catalog by putting ".EQ" into the command line as a suggested ending for the variable name so that it will end up in the catalog. If you don't want this, just press ATTN to clear the ".EQ".
TCINT020@ysub.ysu.edu (Robert Noe) (05/05/90)
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