Draw from distribution converted to spherical coordinate system. Points are first drawn from an ordinary cartesian 2D normal distribution. The distances to points are then assumed to be great circle distances, and are combined with a random bearing from the point centre_lat, centre_lon to produce a final set of lat/lon points.
dispersal_sphere( n, centre_lon, centre_lat, dispersal_model = "normal", scale = 1 )
| n | The number of points to draw |
|---|---|
| centre_lon | The mean longitude of the distribution |
| centre_lat | The mean latitude of the distribution |
| dispersal_model | The model we draw points from (normal or cauchy) |
| scale | The scale parameter of the dispersal distribution defined by the parameter "dispersal_model" |
dispersal_sphere(n = 100, centre_lat = 0, centre_lon = 0, dispersal_model = "normal", scale = 1)#> $longitude #> [1] -1.259089e-02 2.296121e-03 -2.191884e-02 -5.010379e-05 5.589758e-03 #> [6] 1.032791e-02 -1.638400e-02 -2.224250e-03 -2.196140e-03 -2.542431e-03 #> [11] -4.979538e-03 5.656571e-03 1.857122e-02 -1.466784e-02 4.608366e-03 #> [16] -1.675447e-02 -4.694571e-03 -4.730604e-04 4.883283e-03 -8.220472e-03 #> [21] 4.210214e-03 3.264099e-03 -1.173204e-02 6.634982e-03 1.698373e-02 #> [26] -8.763449e-04 -8.416277e-03 -1.434446e-04 -7.435492e-03 -1.360134e-02 #> [31] 8.411923e-03 1.587200e-03 2.191516e-03 1.460093e-02 1.007583e-03 #> [36] -1.205064e-03 -1.717783e-02 -2.511241e-03 -2.818887e-03 9.598530e-03 #> [41] 6.298385e-04 -5.747774e-03 -4.493451e-04 -2.261645e-03 4.000157e-03 #> [46] 2.478007e-02 4.184668e-04 5.195462e-03 1.062952e-03 -1.719252e-02 #> [51] 7.752930e-03 -2.187481e-03 -1.853387e-03 1.724682e-04 2.658463e-04 #> [56] 4.944718e-03 -2.045161e-02 2.412482e-02 -3.248541e-03 1.918754e-03 #> [61] 9.661825e-03 -5.981282e-03 1.001801e-02 -2.211400e-03 -1.059008e-02 #> [66] -8.776035e-03 9.578291e-03 1.184142e-03 4.394344e-03 -1.528353e-02 #> [71] -1.322665e-02 2.555425e-03 1.202681e-02 2.128661e-03 1.185570e-02 #> [76] 4.711634e-03 5.456616e-03 -9.886753e-04 1.548467e-03 -8.123328e-04 #> [81] 1.730604e-02 1.167673e-02 6.734042e-03 5.002246e-03 -4.930596e-03 #> [86] 9.987281e-03 -2.349329e-02 -1.400188e-03 3.902065e-03 -3.434969e-03 #> [91] 3.814811e-03 9.560706e-03 9.431299e-03 -3.426676e-04 4.372042e-03 #> [96] 1.504459e-02 -3.186847e-03 8.510711e-03 1.184250e-02 -2.667748e-03 #> #> $latitude #> [1] -0.0034822953 -0.0070635656 -0.0095034627 -0.0071544760 -0.0157945644 #> [6] -0.0062101565 -0.0050230888 -0.0048263292 0.0020426034 0.0087994565 #> [11] -0.0018785268 -0.0125852006 0.0023250816 -0.0039731979 0.0051135414 #> [16] 0.0191272254 0.0038208438 -0.0151471077 0.0022429241 0.0096482662 #> [21] 0.0183404884 0.0040420349 0.0125168843 0.0038362051 0.0009675261 #> [26] 0.0002005014 0.0054284042 -0.0023620733 -0.0047507930 0.0017280413 #> [31] -0.0103080212 0.0076099215 0.0007349223 -0.0117371991 -0.0084977983 #> [36] 0.0040859921 -0.0076910207 -0.0025801107 0.0080485833 0.0006052834 #> [41] -0.0014629834 -0.0074401791 0.0168758205 0.0068927623 0.0088129623 #> [46] 0.0118870617 -0.0100698014 0.0046279073 -0.0135716609 0.0137842751 #> [51] 0.0038594150 0.0010981024 -0.0102343914 -0.0050183506 0.0094657065 #> [56] 0.0060945554 0.0003462347 -0.0032050129 0.0070402861 0.0072342475 #> [61] -0.0170876574 0.0084157103 -0.0027793669 0.0023658155 -0.0161031793 #> [66] -0.0070889821 -0.0101895086 0.0032704061 -0.0025710518 0.0046555103 #> [71] -0.0009254799 -0.0087600183 0.0114274305 0.0086412646 0.0069132773 #> [76] 0.0093163492 -0.0042617688 -0.0114693621 -0.0027485128 0.0198909209 #> [81] -0.0093679487 -0.0103109366 -0.0150665804 0.0137230960 0.0049839101 #> [86] 0.0179244712 -0.0013860411 0.0230622782 0.0095507878 0.0102765019 #> [91] 0.0101069255 -0.0035703202 -0.0074037654 -0.0052060345 0.0158621389 #> [96] 0.0011960271 0.0033859398 0.0102406439 0.0111629469 0.0055046661 #>