search for: xyvector

Dear R-helpers, can I use a POSIXct date as the x variable in interpSpline? The help page says x and y need to be numeric... is there a workaround? example: library(splines) testdfr <- data.frame(Date=seq(as.POSIXct("2008-08-01"),as.POSIXct("2008-09-01"), length=10)) testdfr$yvar <- rnorm(10) sp <- interpSpline(yvar ~ Date, testdfr) preddfr <-

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 =

BUG IN SPLINE()? Version R-1.0.1, system i486,linux If the spline(x,y,method="natural") function is given values outside the range of the data, it does not give a warning. Moreover, the extrapolated value reported is not the ordinate of the natural spline defined by (x,y). Example. Let x <- c(2,5,8,10) and y <- c(1.2266,-1.7606,-0.5051,1.0390). Then interpolate/extrapolate with

...ion: create D: file: /usr/local/lib/R/library/splines/R-ex/splineDesign.R action: create D: file: /usr/local/lib/R/library/splines/R-ex/splineKnots.R action: create D: file: /usr/local/lib/R/library/splines/R-ex/splineOrder.R action: create D: file: /usr/local/lib/R/library/splines/R-ex/xyVector.R action: create D: file: /usr/local/lib/R/library/splines/R/splines action: create D: file: /usr/local/lib/R/library/splines/TITLE action: create D: file: /usr/local/lib/R/library/splines/help action: create D: file: /usr/local/lib/R/library/splines/help/00Titles action: create D: f...

...html latex example predict.bs text html latex example splineDesign text html latex example splineKnots text html latex example splineOrder text html latex example xyVector text html latex example >>> Building/Updating help pages for package `stepfun' Formats: text html latex example ecdf text html latex example plot.stepfun text html latex exampl...