R version 2.9.0 (2009-04-17) Copyright (C) 2009 The R Foundation for Statistical Computing ISBN 3-900051-07-0 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(7.1,7.7,8.2,9.2,10.2,10.5,10.8,10.8,11.1,11,11.1,10.2,9.6,9.3,8.9,8.8,8.9,9,8.9,8.8,9,8.8,8.8,9.7,9.8,10,10.1,10.1,10,9,8.8,8.4,8,8.1,8,7.8,7.7,7.3,7.2,7.2,6.7,6.7,6.4,6.4,6.3,6,5.5,4.7,3.8,3.6,2.5,1.7,1.6,2.2,2.2,2,1.9,1.6,1.9,2.6) > par3 = 'Handelsbalans van België in miljarden euro's' Error: unexpected symbol in "par3 = 'Handelsbalans van België in miljarden euro's" Execution halted