R version 2.7.0 (2008-04-22)
Copyright (C) 2008 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> x <- c(0.89,0.88,0.87,0.87,0.87,0.87,0.88,0.87,0.86,0.86,0.86,0.84,0.84,0.83,0.84,0.88,0.9,0.89,0.91,0.94,0.94,0.95,0.95,0.98,0.96,1,1.05,1.03,1.07,1.12,1.1,1.06,1.11,1.08,1.07,1.02,1,1.04,1.02,1.07,1.12,1.08,1.02,1.01,1.04,0.98,0.95,0.94,0.94,0.96,0.97,1.03,1.01,0.99,1,1,1.02,1.01,0.99,0.98,1.01,1.03,1.03,1,0.96,0.97,0.98,1.02,1.04,1.01,1.01,1,1.01,1.02,1.03,1.06,1.12,1.12,1.13,1.13,1.13,1.17,1.14,1.08,1.07,1.12,1.14,1.21,1.2,1.23,1.29,1.31,1.37,1.35,1.26,1.26)
> par3 = ''
> par2 = 'Belgostat'
> par1 = 'Prijsevolutie benzine '95'
Error: unexpected numeric constant in "par1 = 'Prijsevolutie benzine '95"
Execution halted