?approxfun -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111
> -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Alaios > Sent: Monday, January 10, 2011 9:43 AM > To: r-help@r-project.org > Subject: [R] From vector to a step function > > Greetings R members. > > I have a few vectors that denote the 'steps' of different step > functions > v1=c(3,4,5,1,2,3,4,5) > v2=c(5,6,2,4,7,3,2,5) > v3=c(1,2,4,7,3,1,3,5) > > Here v1,v2,v3 are considered as the steps for the f1,f2,f3 step > functions. > > For example f1 looks like that (step size is always same and fixed) > > f1= 3 (x>=-3,x<-2) > f1= 4 (x>=-2,x<-1) > f1= 5 (x>=-1,x<0) > f1= 1 (x>=0, x<1) > and so on. > > What I only have are these vectors that are interpreted as functions > (as shown above, x (step is 1 here). I would like to ask your help of > how I can create some function that reads one of the vector > v1,v2,v3.... and returns results that are acceptable by integrate() > function. > > Usually integrate wants a pre-defined function like > myfunc(x)<-function{ x^2 } > but this is not the case here. > > Could you please give me some hints how I can proceed? > > I would like to thank u in advance for your help > > Regards > Alex > > ______________________________________________ > R-help@r-project.org mailing list > 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 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.
