grid                package:SpherWave                R Documentation

_G_e_n_e_r_a_t_i_o_n _o_f _G_r_i_d

_D_e_s_c_r_i_p_t_i_o_n:

     produces grid points by G\"{o}ttlemann's method, modified
     G\"{o}ttlemann's method or standard method.

_U_s_a_g_e:

     modreggrid(l)    # for modified G\"{o}ttlemann's regular grid
     modredgrid(l)    # for modified G\"{o}ttlemann's reduced grid
     gotreggrid(l)    # for G\"{o}ttlemann's regular grid
     gotredgrid(l)    # for G\"{o}ttlemann's reduced grid
     reggrid(l)       # for standard regular grid
     redgrid(l)       # for standard reduced grid

_A_r_g_u_m_e_n_t_s:

       l: levels

_D_e_t_a_i_l_s:

     This function generates the grid points on globe.

_V_a_l_u_e:

    grid: grid points

_R_e_f_e_r_e_n_c_e_s:

     Oh, H-S. (1999)  Spherical wavelets and their statistical analysis
     with applications to meteorological data. Ph.D. Thesis, 
     Department of Statistics, Texas A&M University, College Station.

_E_x_a_m_p_l_e_s:

     rec.reg <- reggrid(3)$grid 
     rec.red <- redgrid(3)$grid 
     mod.reg <- modreggrid(3)$grid
     mod.red <- modredgrid(3)$grid
     got.reg <- gotreggrid(2)$grid
     got.red <- gotredgrid(2)$grid

     par(mfrow = c(3, 2), mar = c(2.1, 4.1, 4.1, 1.1))
     world() 
     points(rec.reg[, 2], rec.reg[, 1], cex = 0.7)
     title(main = "(a)")
     world() 
     points(rec.red[, 2], rec.red[, 1], cex = 0.7)
     title(main="(b)")
     world() 
     points(mod.reg[, 2], mod.reg[, 1], cex = 0.7)
     title(main = "(c)")
     world() 
     points(mod.red[, 2], mod.red[, 1], cex = 0.7)
     title(main = "(d)")
     world() 
     points(got.reg[, 2], got.reg[, 1], cex = 0.7)
     title(main = "(e)")
     world() 
     points(got.red[, 2], got.red[, 1], cex = 0.7)
     title(main = "(f)")

