R version 2.7.1 (2008-06-23)
Copyright (C) 2008 The R Foundation for Statistical Computing
ISBN 3-900051-07-0

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> x <- c(0.8900,0.8800,0.8700,0.8700,0.8700,0.8700,0.8800,0.8700,0.8600,0.8600,0.8600,0.8400,0.8400,0.8300,0.8400,0.8800,0.9000,0.8900,0.9100,0.9400,0.9400,0.9500,0.9500,0.9800,0.9600,1.0000,1.0500,1.0300,1.0700,1.1200,1.1000,1.0600,1.1100,1.0800,1.0700,1.0200,1.0000,1.0400,1.0200,1.0700,1.1200,1.0800,1.0200,1.0100,1.0400,0.9800,0.9500,0.9400,0.9400,0.9600,0.9700,1.0300,1.0100,0.9900,1.0000,1.0000,1.0200,1.0100,0.9900,0.9800,1.0100,1.0300,1.0300,1.0000,0.9600,0.9700,0.9800,1.0200,1.0400,1.0100,1.0100,1.0000,1.0100,1.0200,1.0300,1.0600,1.1200,1.1200,1.1300,1.1300,1.1300,1.1700,1.1400,1.0800,1.0700,1.1200,1.1400,1.2100,1.2000,1.2300,1.2900,1.3100,1.3700,1.3500,1.2600,1.2600)
> par3 = ''
> par2 = 'Belgostat'
> par1 = 'Prijsveranderingen benzine '95'
Error: unexpected numeric constant in "par1 = 'Prijsveranderingen benzine '95"
Execution halted