A: Look at the function seq() e.g. seq(0.01, 1, by=0.005) B: Don't post in HTML. Seriously. Do not.
C: You need to invest more time getting the basics down. Google for R introduction. D: Ow. pi is a predefined constant. Your re-defintion loses accuracy. (See C:) Please see here for some hints on how to ask questions productively: http://adv-r.had.co.nz/Reproducibility.html http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example B. On Apr 29, 2015, at 10:47 AM, dawood ahmad <dawoodma...@hotmail.com> wrote: > Dear Sir/Madam, > > I hope you will be fine. Recently, I have started to use R language. I am new > in programming. > I have to fit my data with mathematical equation which I am pasting below. > The problem is that one of the > parameter named "ep" which is x-axis required a loop so that I could a range > of data. Please see below the code, > > > pi<-3.14159; c<-0.5; xc<-2; s<-6; Hc2<-30; H<-1; ep<-0.01; > f<-function(k) 1.211*10^(-6)*Hc2/H*(trigamma( ((ep + H/Hc2 + (2*xc/s)^2*(1 - > cos(k*s))/2)/2*Hc2/H)) - trigamma(((c + H/Hc2 + (2*xc/s)^2*(1 - > cos(k*s))/2)/2*Hc2/H))); > integrate(f,-pi/s,pi/s)$value > I have typed in bold the x-axis. If I execute this model, it works well. But, > I want to make a loop for this parameter inorder to enter a range of > values.For instance, from 0.01 to 1 with specific interval (increment > interval 0.005). I will be really grateful if you help me in this matter. > With best Regards, Dawood > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@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. ______________________________________________ R-help@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.
