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(6550,8728,12026,14395,14587,13791,9498,8251,7049,9545,9364,8456,7237,9374,11837,13784,15926,13821,11143,7975,7610,10015,12759,8816,10677,10947,15200,17010,20900,16205,12143,8997,5568,11474,12256,10583,10862,10965,14405,20379,20128,17816,12268,8642,7962,13932,15936,12628,12267,12470,18944,21259,22015,18581,15175,10306,10792,14752,13754,11738,12181,12965,19990,23125,23541,21247,15189,14767,10895,17130,17697,16611,12674,12760,20249,22135,20677,19933,15388,15113,13401,16135,17562,14720,12225,11608,20985,19692,24081,22114,14220,13434,13598,17187,16119,13713,13210,14251,20139,21725,26099,21084,18024,16722,14385,21342,17180,14577) > par3 = '0.1' > par2 = '0.9' > par1 = '0.1' > ylab = 'aantal verkochte auto's ' Error: unexpected symbol in "ylab = 'aantal verkochte auto's" Execution halted