R version 2.15.1 (2012-06-22) -- "Roasted Marshmallows"
Copyright (C) 2012 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i686-pc-linux-gnu (32-bit)

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> x <- c(51442,45594,52518,48564,41745,49585,32747,33379,35645,37034,35681,20972,58552,54955,65540,51570,51145,46641,35704,33253,35193,41668,34865,21210,56126,49231,59723,48103,47472,50497,40059,34149,36860,46356,36577,23872,57276,56389,57657,62300,48929,51168,39636,33213,38127,43291,30600,21956,48033,46148,50736,48114,38390,44112,36287,30333,35908,40005,35263,26591,49771,47882,64830,57846,48188,54400,39778,37772,37214,43829,40701,29450,53597,53588,64172,53955,55509,48908,35331,38073,41776,42717,40736,49020)
> par4 = '12'
> par3 = 'aantal auto's per maand'
Error: unexpected symbol in "par3 = 'aantal auto's"
Execution halted