R version 3.0.1 (2013-05-16) -- "Good Sport"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: i686-pc-linux-gnu (32-bit)

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> x <- c(14544,14931,14886,16005,17064,15168,16050,15839,15137,14954,15648,15305,15579,16348,15928,16171,15937,15713,15594,15683,16438,17032,17696,17745,19394,20148,20108,18584,18441,18391,19178,18079,18483,19644,19195,19650,20830,23595,22937,21814,21928,21777,21383,21467,22052,22680,24320,24977,25204,25739,26434,27525,30695,32436,30160,30236,31293,31077,32226,33865,32810,32242,32700,32819,33947,34148,35261,39506,41591,39148,41216,40225,41126,42362,40740,40256,39804,41002,41702,42254,43605,43271,43221,41373)
> par4 = 'No season'
> par3 = 'Goudkoers te Brussel in eur/kg'
> par2 = 'Belgostat'
> par1 = 'Goudkoers te Brussel in euro/kg'
> ylimmax = ''
> ylimmin = ''
> ylab = 'EURO/KG'
> xlab = '01'2006-12'2012 per maand'
Error: unexpected numeric constant in "xlab = '01'2006"
Execution halted