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

[Gabor Grothendieck]

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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