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

Ivan Calandra calandra at rgzm.de
Tue Sep 19 10:24:28 CEST 2017

```It's always good to start a new session when you don't understand what's
wrong, because sometimes your code is correct, but you use old data
without knowing it :)

Ivan

--
Dr. Ivan Calandra
TraCEr, Laboratory for Traceology and Controlled Experiments
MONREPOS Archaeological Research Centre and
Museum for Human Behavioural Evolution
Schloss Monrepos
56567 Neuwied, Germany
+49 (0) 2631 9772-243
https://www.researchgate.net/profile/Ivan_Calandra

On 19/09/2017 10:19, AbouEl-Makarim Aboueissa wrote:
> Dear Zeileis:
>
> Thank you very much
>
> abou
>
> On Tue, Sep 19, 2017 at 4:13 AM, Achim Zeileis <Achim.Zeileis at uibk.ac.at>
> wrote:
>
>>
>> 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
>>>
>>>          [[alternative HTML version deleted]]
>>>
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