R version 2.13.0 (2011-04-13)
Copyright (C) 2011 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i486-pc-linux-gnu (32-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> x <- c(49.164,50.112,52.329,52.872,53.008,53.804,57.150,57.863,58.334,60.621,62.084,62.395,61.064,65.989,67.170,68.813,69.255,70.643,73.657,72.723,72.966,75.159,74.414,75.573,70.977,72.291,72.384,74.385,70.977,68.889,71.950,70.463,70.615,72.567,75.962,75.851,75.005,78.635,82.937,80.337,82.336,81.858,83.732,84.158,84.806,86.610,91.300,92.038,99.274,99.292,100.169,103.661,100.427,106.692,108.459,109.815,108.914,111.181,114.572,115.019,149.365,154.780,163.305,168.139,170.969,178.788,184.302,182.706,189.415,192.260,200.070,200.555,203.220,207.325,209.362,205.709,205.752,204.527,208.881,212.113,216.893,219.171,226.970,222.226)
> par4 = 'Unknown'
> par3 = 'FALSE'
> par2 = 'grey'
> par1 = '10'
> xlab = 'x'
> main = 'Histogram 1 kp woonhuis antw. '90 -'10'
Error: unexpected numeric constant in "main = 'Histogram 1 kp woonhuis antw. '90"
Execution halted