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]]
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]] > > ______________________________________________ > R-help at r-project.org 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. >
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]] >> >> ______________________________________________ >> R-help at r-project.org 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]]
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 <abouelmakarim1962 at gmail.com>:> 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]] > > ______________________________________________ > R-help at r-project.org 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.