------------------- > > I was wondering whether someone can help me understand the > following behavior of the ace-function: > > When ace is called with mon-parameter set to zero, R gives the > message "response spec can only be lin or ordered > (default)" and returns immediately. However, according to the help > file mon=0 requires the response transformations to be limited > to monotonic transformations. > > For instance, the following call of the ace-function will not be > evaluated if one gives mon=0 > > TWOPI <- 8*atan(1) > x <- runif(200,0,TWOPI) > y <- exp(sin(x)+rnorm(200)/2) > a <- ace(x,y, mon=0) > > Why does mon=0 not work and how should one interpret the message > "the response spec can only be lin or ordered" ? > > Any help will be greatly appreciated, > Christof > > Christof Schuster > University of Notre Dame > Department of Psychology > 103 Haggar Hall > Notre Dame, IN 46556
I use ace and avas quite a bit and have found a few tiny bugs such as that one. I reported these bugs to the R bug list about a year ago and await corrections. As you said, ace does handle nonmonotonic transformations of Y; you just have to turn off that error message. Frank Harrell ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
