# Graph f(x) = 1/x

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## Graph f(x) = 1/x

 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* 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]] ______________________________________________ [hidden email] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.
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## Re: Graph f(x) = 1/x

 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]] > > ______________________________________________ > [hidden email] mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html> and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ [hidden email] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.
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## Re: Graph f(x) = 1/x

 Dear Zeileis: Thank you very much abou On Tue, Sep 19, 2017 at 4:13 AM, Achim Zeileis <[hidden email]> 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]] >> >> ______________________________________________ >> [hidden email] mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help>> PLEASE do read the posting guide http://www.R-project.org/posti>> ng-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> >> -- ______________________ AbouEl-Makarim Aboueissa, PhD Professor of Statistics Department of Mathematics and Statistics University of Southern Maine         [[alternative HTML version deleted]] ______________________________________________ [hidden email] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.
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## Re: Graph f(x) = 1/x

 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_CalandraOn 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 <[hidden email]> > 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]] >>> >>> ______________________________________________ >>> [hidden email] mailing list -- To UNSUBSCRIBE and more, see >>> https://stat.ethz.ch/mailman/listinfo/r-help>>> PLEASE do read the posting guide http://www.R-project.org/posti>>> ng-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >>> > ______________________________________________ [hidden email] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.
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## Re: Graph f(x) = 1/x

 In reply to this post by AbouEl-Makarim Aboueissa-3 Hello, I believe that the easiest way is curve(1/x, -5, 5) Also, you're missing a '-' in y < 1/x, it should be y <- 1/x Hope this helps, Rui Barradas Citando AbouEl-Makarim Aboueissa <[hidden email]>: > 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* > > > 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]] > > ______________________________________________ > [hidden email] mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html> and provide commented, minimal, self-contained, reproducible code. ______________________________________________ [hidden email] mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide http://www.R-project.org/posting-guide.htmland provide commented, minimal, self-contained, reproducible code.