x<-seq(-1,1,length=10) y<-seq(-1,1,length=10) a<-matrix(c(1,2,2,1),2,2) b<-matrix(c(2,1,1,2),2,2)
fv<-function(x,y) { m<-x*a+y*b t<-m[1,1]+m[2,2]; d<-m[1,1]*m[2,2]-m[1,2]^2 return((t-sqrt(t^2-4*d))/2) } gv<-function(x,y) { t<-x*(a[1,1]+a[2,2])+y*(b[1,1]+b[2,2]) d<-(x*a[1,1]+y*b[1,1])*(x*a[2,2]+y*b[2,2])-(x*a[1,2]+y*b[1,2])^2 return((t-sqrt(t^2-4*d))/2) } now outer(x,y,gv) works as expected, outer(x,y,fv) bombs. But z<-matrix(0,10,10); for (i in 1:10) for (j in 1:10) z[i,j]<-fv(x[i],y [j]) works fine. Must be something in outer(). ========================================================== Jan de Leeuw, 11667 Steinhoff Rd, Frazier Park, CA 93225, 661-245-1725 .mac: jdeleeuw ++++++ aim: deleeuwjan ++++++ skype: j_deleeuw homepages: http://www.cuddyvalley.org and http://gifi.stat.ucla.edu ========================================================== A bath when you're born, a bath when you die, how stupid. (Issa 1763-1827) [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch 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.