R version 2.15.2 (2012-10-26) -- "Trick or Treat" Copyright (C) 2012 The R Foundation for Statistical Computing ISBN 3-900051-07-0 Platform: i686-pc-linux-gnu (32-bit) R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > x <- c(1.26,1.26,1.28,1.34,1.39,1.47,1.57,1.63,1.72,1.43,1.35,1.41,1.44,1.43,1.43,1.42,1.45,1.51,1.48,1.48,1.45,1.38,1.46,1.45,1.41,1.45,1.47,1.47,1.53,1.56,1.66,1.79,1.78,1.46,1.41,1.43,1.43,1.45,1.35,1.35,1.29,1.29,1.26,1.3,1.3,1.16,1.24,1.15,1.21,1.22,1.17,1.13,1.15,1.2,1.23,1.25,1.38,1.28,1.26,1.25,1.26,1.28,1.31,1.22,1.23,1.36,1.54,1.58,1.44,1.29,1.28,1.23) > ylimmax = as.numeric(reeks) Error: object 'reeks' not found Execution halted