[R] Graph f(x) = 1/x

[Achim Zeileis]

On Tue, 19 Sep 2017, AbouEl-Makarim Aboueissa wrote:

> Dear All: good morning
>
> I am trying to graph the function y=f(x)=1/x over the interval (-5,5). But
> I am getting an error message. Please see below.
>
> I am getting the error message: *Error in xy.coords(x, y, xlabel, ylabel,
> log) : *
> *  'x' and 'y' lengths differ*

You have "y < 1/x" rather than "y <- 1/x"! So "y" is not assigned and 
presumably you have some old "y" variable in your global environment that 
is used and does not match the length of "x".

>
> x
>
> x <- seq(-5, 5, 0.01)
> y < 1/x
>
> plot(x,y, type='l', xlim=c(-5, 5), ylim=c(-5, 5), xlab = "x", ylab = "f(x)
> = 1/x", lwd = 2, col ="red")
>
> abline(h=0, lty=2, col = "blue")
> abline(v=0, lty=2, col = "blue")
> axis(1)
> axis(2)
> title(main="The Graph of f(x) = 1/x")
>
>
> any help will be highly appreciated.
>
>
> with thanks
> abou
> ______________________
> AbouEl-Makarim Aboueissa, PhD
> Professor of Statistics
> Department of Mathematics and Statistics
> University of Southern Maine
>
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>
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