50g

--- In 50g@yahoogroups.com, "Juan C." <jcbuchin@...> wrote:
>
> Hello there, what is happening with your equations is that the F
(x) in N
> (x) is different from the F(x) you define, for example when you 
define f
> (x)=x^3-7 the calculator creates a program that looks like this:
> << ¨ x 'x^3-7' >>
> and stores it in a global variable called 'F'; this means that in 
run-
> time the calculator create a temporary local variable called 'x' 
this 
> variable is different that a global variable called 'x' that you 
may 
> have in your current directory. The same is true for the F(x) you 
> define and F(x) in N(x). A better approach is to have a program N 
like 
> this:
> << ¨ x0
>     << 'x' DUP F DUP 'x' Ý / - 'x' x0 = SUBST ¨NUM >>
> >>
> I hope this helps.
>
Thank you very much! I wondered if global/local variable would be 
the reason, but I didn't know what to do about it. Any thoughts on 
the odd fractional root graphs? Thanks again!