R version 2.13.0 (2011-04-13)
Copyright (C) 2011 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i486-pc-linux-gnu (32-bit)

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> x <- c(4.95,4.95,4.96,4.93,4.95,4.96,4.97,5.01,5.04,5.07,5.07,5.08,5.07,5.08,5.09,5.09,5.14,5.17,5.17,5.18,5.18,5.18,5.17,5.17,5.18,5.18,5.26,5.26,5.26,5.28,5.28,5.31,5.37,5.42,5.43,5.43,5.44,5.5,5.52,5.55,5.55,5.55,5.55,5.55,5.55,5.55,5.55,5.56,5.57,5.59,5.69,5.73,5.76,5.77,5.77,5.79,5.79,5.79,5.79,5.79)
> par4 = '12'
> par3 = 'prijs euro zonnebankabonnenment'
> par2 = 'Belgostat'
> par1 = 'prijs euro zonnebankbeurten 2006'01-2010'12'
Error: unexpected numeric constant in "par1 = 'prijs euro zonnebankbeurten 2006'01"
Execution halted