function for meshless collocation of fem-problem. step can be used to choose several cases. step=1 does not need to be called directly but is used by the other steps. So call step=2, 3 and change options there. More...
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Functions | |
function res = | rbf_elliptic (step, params) |
function for meshless collocation of fem-problem. step can be used to choose several cases. step=1 does not need to be called directly but is used by the other steps. So call step=2, 3 and change options there. More... | |
function res = | rbfelliptic>grad_phi_vec_aux (x, kernel_derivative, n, X) |
function for meshless collocation of fem-problem. step can be used to choose several cases. step=1 does not need to be called directly but is used by the other steps. So call step=2, 3 and change options there.
Definition in file rbf_elliptic.m.
function res = rbf_elliptic | ( | step, | |
params | |||
) |
function for meshless collocation of fem-problem. step can be used to choose several cases. step=1 does not need to be called directly but is used by the other steps. So call step=2, 3 and change options there.
step 1: single solve. params.gamma can be set, params.colpoints_choice can be set to 1(random) or 2(structured). params.model_choice = 1 (poisson) or 2 (singular elliptic) If params.no_plots is set, then no plots and no screen output are performed. Output fields are res.u_h and the l2-error res.err and condition number res.cond
step 2 % working example for poisson
step 3 % working example for difficult ellipic model
step 4 % determine errors and matrix conditions over a range of gammas and plot of error by repeated calls of step 1. Finds optimal gamma
step | step |
params | params |
res | res |
no_plots —
no plots gamma —
gamma colpoints_choice —
colpoints choice model_choice —
model choice refinements —
refinementsu_h —
u h err —
err cond —
cond gammas —
gammas errs —
errs conds —
conds gamma_opt —
gamma opt Definition at line 17 of file rbf_elliptic.m.