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comparison +sbp/+implementations/d1_upwind_4.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_4(m,h) 1 function [H, HI, Dp, Dm, e_1, e_m] = d1_upwind_4(m,h)
2
3 if(m<8)
4 error('Operator requires at least 8 grid points');
5 end
2 6
3 Hv=ones(m,1); 7 Hv=ones(m,1);
4 Hv(1:4)=[49/144 61/48 41/48 149/144]; 8 Hv(1:4)=[49/144 61/48 41/48 149/144];
5 Hv(m-3:m)=rot90(Hv(1:4),2); 9 Hv(m-3:m)=rot90(Hv(1:4),2);
6 Hv = Hv*h; 10 Hv = Hv*h;