A numerical solution of the 2D wave equation utt = β2 (uxx + uyy) is required over the region R in the x, y plane R = {(x, y)| 0 < x < a, 0 < y < b}-A numerical solution of the 2D wave equation utt = β2 (uxx+ uyy) is required over

分类概率used to split by one varince for another in R programe when you analysis the data for time serise,esp for the economic data like the future and stock-used to split by one varince for another in R programe when you analysis the data for time seris