Thank you very much Duncan for your quick answers. > You're not passing a function as myfunk1, you're passing mf, which is > the result of evaluating myfun1, so it's a numeric vector.
Yes, this is exacty my problem. If I leave it away, the problem will not be resolved (it needs pa or not) myfun1<-function(x,pa) { return(pa[1]*x^2+pa[2]*x+pa[3]) } myfun2<-function(x,param,myfunk1) { return(param[1]*myfunk1(x)+param[2]*myfunk1(x)) } test<-function(pars1,pars2,lo,up){ integ=integrate(f=myfun2,lower=lo,upper=up,param=pars2,myfunk1=myfun1)#pa=pars1 return( 2*integ$value ) } test(pars1=c(1,2,3),pars2=c(-1,1),lo=2,up=7) Which gives an error: Once the "argument pa" is missing and if you add the "pa=pars1" in the comment, it says that the argument pa is redundant. Thanks for help, Thomas ______________________________________________ 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.