R version 2.15.1 (2012-06-22) -- "Roasted Marshmallows" Copyright (C) 2012 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(1901.15 1912.64 1917.07 1921.48 1921.81 1921.81 1921.81 1921.73 1921.44 1921.19 1920.66 1920.66 1920.64 1922.47 1922.63 1922.05 1916.24 1916.68 1916.36 1915.08 1908.62 1905.12 1905.37 1905.37 1904.26 1905.29 1903.11 1891.65 1886.42 1886.42 1885.05 1880.38 1875.52 1871.52 1870.8 1870.8 1869.46 1862.85 1861.84 1845.39 1844.33 1844.33 1844.33 1841.59 1840.37 1842.9 1842.67 1842.67 1842.67 1844.01 1845 1841.55 1850.07 1850.07 1850.07 1852.48 1859.52 1859.32 1858.22 1858.22 1856.87 1858.99 1865.52 1876.68 1876.88 1876.88 1876.77 1876.39 1878.26 1878.08 1875.95 1875.95 1875.95 1872.59 1865.71 1868.53 1855.87) Error: unexpected numeric constant in "x <- c(1901.15 1912.64" Execution halted