# [R] Solve equality function with GA

Eric Berger er|cjberger @end|ng |rom gm@||@com
Sun Sep 25 10:43:37 CEST 2022

```?ga states that ga() searches for the maximum of the fitness function.
The maximum of your fitness function is at x=0.

On Sun, Sep 25, 2022 at 4:52 AM Bert Gunter <bgunter.4567 using gmail.com> wrote:

> We aren't supposed to do homework on this list.
>
> Bert Gunter
>
> On Sat, Sep 24, 2022 at 5:29 PM Barry King via R-help <
> r-help using r-project.org>
> wrote:
>
> > -------------------
> > library(GA)
> >
> > # Solve for x where x^2 = 25, not x^2 <= 25
> >
> > f <- function(x)
> > {
> >   x^2-25
> > }
> >
> > fitness <- function(x) -f(x)
> >
> > GA <- GA <- ga(type = "real-valued", fitness = fitness, lower = 0, upper
> =
> > 10)
> > summary(GA)
> > -------------------------
> > Thank you,
> > Barry King
> >
> > --
> >
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