[R-sig-teaching] Plot f(x) = x^(1/5)

[Steven Stoline]

Dear All:


can someone please help me to plot the *Folium of Descrates:**  x^3+y^3=3xy
for x<-seq(-5,5,0.010) and **y<-seq(-5,5,0.010) *
<https://www.google.com/search?biw=1155&bih=597&q=R:+Folium+of+Descartes&spell=1&sa=X&ved=0ahUKEwiBrsnWpeTMAhUFKB4KHU5TD0EQvwUIGSgA>


with thanks
steve

On Tue, May 17, 2016 at 9:07 AM, Gabor Grothendieck <ggrothendieck at gmail.com
> wrote:

> Try this:
>
>  y <- sign(x) * abs(x)^(1/5)
>
> On Tue, May 17, 2016 at 8:44 AM, Steven Stoline <sstoline at gmail.com>
> wrote:
> > Dear All:
> >
> >
> > I am trying to plot the function f(x) = x^(1/5) for x=seq(-2,2,0.01). It
> > give me only the plot of f(x) for the positive part of x. I checked the
> > values of f(x), it is NaN for all negative values of x.
> >
> > *this is my code:*
> >
> >
> > x<-seq(-2,2,0.01)
> > y<- (x)^(1/5)
> > plot(x,y, type="l", lwd=3, xlab = " ", ylab = " ", col="blue")
> > abline(v=0, col="gray", lty=2, lwd=3)
> > abline(h=0, col="gray", lty=2, lwd=3)
> >
> >
> >
> > any help will be appreciated.
> >
> >
> > with many thanks
> > steve
> > --
> > Steven M. Stoline
> > 1123 Forest Avenue
> > Portland, ME 04112
> > sstoline at gmail.com
> >
> >         [[alternative HTML version deleted]]
> >
> > _______________________________________________
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>
>
>
> --
> Statistics & Software Consulting
> GKX Group, GKX Associates Inc.
> tel: 1-877-GKX-GROUP
> email: ggrothendieck at gmail.com
>



-- 
Steven M. Stoline
1123 Forest Avenue
Portland, ME 04112
sstoline at gmail.com

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