R version 2.8.1 (2008-12-22)
Copyright (C) 2008 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> y <- c(104.89,105.15,105.24,105.57,105.62,106.17,106.27,106.41,106.94,107.16,107.32,107.32,107.35,107.55,107.87,108.37,108.38,107.92,108.03,108.14,108.3,108.64,108.66,109.04,109.03,109.03,109.54,109.75,109.83,109.65,109.82,109.95,110.12,110.15,110.21,109.99,110.14,110.14,110.81,110.97,110.99,109.73,109.81,110.02,110.18,110.21,110.25,110.36,110.51,110.6,110.95,111.18,111.19,111.69,111.7,111.83,111.77,111.73,112.01,111.86,112.04)
> x <- c(124,118.63,121.86,119.97,125.03,130.09,126.65,121.7,119.24,122.63,116.66,114.12,113.11,112.61,113.4,115.18,121.01,119.44,116.68,117.07,117.41,119.58,120.92,117.09,116.77,119.39,122.49,124.08,118.29,112.94,113.79,114.43,118.7,120.36,118.27,118.34,117.82,117.65,118.18,121.02,124.78,131.16,130.14,131.75,134.73,135.35,140.32,136.35,131.6,128.9,133.89,138.25,146.23,144.76,149.3,156.8,159.08,165.12,163.14,153.43,151.01)
> par5 = 'aankoop auto's'
Error: unexpected symbol in "par5 = 'aankoop auto's"
Execution halted