R version 2.15.3 (2013-03-01) -- "Security Blanket" Copyright (C) 2013 The R Foundation for Statistical Computing ISBN 3-900051-07-0 Platform: i686-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("f" -2.67,"f" 9.67,"f" -6,"f" 28.33,"f" 12,"f" -11.3,"f" 3,"f" -4.67,"f" -5,"f" 2.33,"f" 37.67,"f" 7.5,"f" 5,"f" 30,"f" 15.33) Error: unexpected numeric constant in "x <- c("f" -2.67,"f" 9.67" Execution halted