Re: (TI-83) How do I store a formula as text?
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> holmgren@chelsea.ios.com@chelsea.ios.com (Robert Holmgren) writes:
> In <E0yMMy.4K1@news2.new-york.net>, "Harry Elam" <hbe@way.com> writes:
>
> >> "Bill Brower" <wbrower@indiana.edu> writes:
> >> I have a TI-83 and want to store some basic formulas for reference.
> >> For example, I'd like to store "D=(I-A)X" somewhere.
> >> I tried the List function, but continually get syntax errors for the =
> >> symbol.
>
> >Have you looked at chapter 15 of the Guidebook? You can store an
> >expression in a string variable, say Str0, and execute it with
> >expr(Str0). Of course, you have to go to the Catalog to find expr(...
>
> expr(Str0) is fine for converting a string into an expression, but
> I too can't figure out how to do the opposite -- get expression
> A into string Str0. The calculator barfs on A->Str0. Equ>String(
> works only with equations. There's gotta be a way... but what is
> it?
>>>>
What kind of expression is A? "A" is a valid expression which returns the
value of variable A. To enter it into Str0, you type:
"A"->Str0
To get the value, you type:
expr(Str0)
Actually, you could just type A, which is a good deal quicker.
Where is the problem? "Equation" in TI calc terms doesn't necessarily
mean an expression with an equals sign in it.
Harry
References: