R version 3.0.2 (2013-09-25) -- "Frisbee Sailing"
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Platform: x86_64-pc-linux-gnu (64-bit)

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> x <- c(44.91,44.86,44.76,44.89,44.89,45,45.01,45.11,45.05,44.67,44.48,44.48,44.48,44.58,44.79,44.79,44.41,44.41,44.44,44.43,44.36,44.39,44.39,44.41,44.32,44.43,44.82,44.97,44.91,44.79,44.76,44.8,44.65,44.49,44.56,44.4,44.45,44.46,44.39,44.5,44.44,44.41,44.4,44.42,44.49,44.46,44.49,44.5,44.5,44.5,44.55,44.53,44.49,44.49,44.62,44.59,44.56,44.57,44.04,44.06,44.07,44.1,44.21,44.48,44.51,44.24,44.25,44.27,44.45,44.39,44.23,44.23)
> par4 = '12'
> par3 = 'gemiddelde consumptie wegwerplenzen per maand in euro's'
Error: unexpected symbol in "par3 = 'gemiddelde consumptie wegwerplenzen per maand in euro's"
Execution halted