treering package:datasets R Documentation _Y_e_a_r_l_y _T_r_e_e_r_i_n_g _D_a_t_a, -_6_0_0_0-_1_9_7_9 _D_e_s_c_r_i_p_t_i_o_n: Contains normalized tree-ring widths in dimensionless units. _U_s_a_g_e: treering _F_o_r_m_a_t: A univariate time series with 7981 observations. The object is of class '"ts"'. Each tree ring corresponds to one year. _D_e_t_a_i_l_s: The data were recorded by Donald A. Graybill, 1980, from Gt Basin Bristlecone Pine 2805M, 3726-11810 in Methuselah Walk, California. _S_o_u_r_c_e: Time Series Data Library: , series 'CA535.DAT' _R_e_f_e_r_e_n_c_e_s: For background on Bristlecone pines and Methuselah Walk, see ; for some photos see