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comparison +sbp/+implementations/d1_upwind_3.m @ 266:bfa130b7abf6 operator_remake

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Added error message for too few grid points to all implementation files.
author Martin Almquist <martin.almquist@it.uu.se>
date Fri, 09 Sep 2016 11:03:13 +0200
parents 6009f2712d13
children f7ac3cd6eeaa
comparison
equal deleted inserted replaced
265:3e0432b3cb68 266:bfa130b7abf6
1 function [H, HI, Dp, Dm, e_1, e_m] = d1_upwind_3(m,h) 1 function [H, HI, Dp, Dm, e_1, e_m] = d1_upwind_3(m,h)
2
3 if(m<6)
4 error('Operator requires at least 6 grid points');
5 end
6
2 Hv = ones(m,1); 7 Hv = ones(m,1);
3 Hv(1:3) = [3/8; 7/6; 23/24]; 8 Hv(1:3) = [3/8; 7/6; 23/24];
4 Hv(m-2:m) = rot90(Hv(1:3),2); 9 Hv(m-2:m) = rot90(Hv(1:3),2);
5 Hv = Hv*h; 10 Hv = Hv*h;
6 H = spdiag(Hv,0); 11 H = spdiag(Hv,0);