Date: Tue, 07 Apr 1998 03:30:33 +0100 From: "A. Tsiolakidis" <tsioltas@cs.keele.ac.uk> To: r-help@stat.math.ethz.ch Subject: R-beta: spline problems(?) Hi, I am a total beginner with this whole thing so please have patience! I am trying to run an S-plus program with a certain line: spline(1:nrow(y), y[,1],n=100); This crashes with: Error: NAs in foreign function call (arg 8) Apparently, this is caused by the last command of spline: u <- seq(xmin, xmax, length.out = n) .C("spline_eval", z$method, length(u), x = u, y = double(n), z$n, z$x, z$y, z$b, z$c, z$d)[c("x", "y")] } Now, I can cause that error with: spline(1:10,1:10) So, there is a whole class of problems for which spline refuses to compute anything - is this the correct behaviour? E.g., spline(1:10,(1:10)/2.5) #it is alright, but ... spline(1:10,(1:10)/2) # this has the "NAs.." problem Finally, I am almost sure that the y matrix in my program has quite normal values, i.e. values that should allow for meaningful interpolation. Anybody knows what this all is about? Thanks, Tasos T. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._