R version 2.8.0 (2008-10-20) Copyright (C) 2008 The R Foundation for Statistical Computing ISBN 3-900051-07-0 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(1990 387,1991 396,1992 399,1993 407,1994 416,1995 421,1996 427,1997 440,1998 448,1999 448,2000 456,2001 460,2002 462,2003 464,2004 467,2005 468,2006 470) Error: unexpected numeric constant in "x <- c(1990 387" Execution halted