R version 2.15.2 (2012-10-26) -- "Trick or Treat"
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(2006-10	4.07,2006-11	4.07,2006-12	4.07,2007-01	4.07,2007-02	4.07,2007-03	4.3,2007-04	4.44,2007-05	4.52,2007-06	4.52,2007-07	4.52,2007-08	4.53,2007-09	4.53,2007-10	4.53,2007-11	4.53,2007-12	4.53,2008-01	4.53,2008-02	4.53,2008-03	4.53,2008-04	4.61,2008-05	4.63,2008-06	4.63,2008-07	4.63,2008-08	4.63,2008-09	4.63,2008-10	4.63,2008-11	4.63,2008-12	4.63,2009-01	4.63,2009-02	4.63,2009-03	4.66,2009-04	4.7,2009-05	4.72,2009-06	4.73,2009-07	4.73,2009-08	4.74,2009-09	4.74,2009-10	4.74,2009-11	4.76,2009-12	4.88,2010-01	4.88,2010-02	4.88,2010-03	4.88,2010-04	4.89,2010-05	4.97,2010-06	4.97,2010-07	4.97,2010-08	4.97,2010-09	4.97,2010-10	4.97,2010-11	4.97,2010-12	4.97,2011-01	4.97,2011-02	4.97,2011-03	4.97,2011-04	4.98,2011-05	5,2011-06	5.03,2011-07	5.04,2011-08	5.04,2011-09	5.05,2011-10	5.05,2011-11	5.05,2011-12	5.06,2012-01	5.06,2012-02	5.06,2012-03	5.07,2012-04	5.09,2012-05	5.18,2012-06	5.23,2012-07	5.25,2012-08	5.26,2012-09	5.28,2012-10	5.29)
Error: unexpected numeric constant in "x <- c(2006-10  4.07"
Execution halted