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comparison +sbp/+implementations/d2_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, D1, D2, e_1, e_m, M, Q, S_1, S_m] = d2_4(m,h) 1 function [H, HI, D1, D2, e_1, e_m, M, Q, S_1, S_m] = d2_4(m,h)
2
3 BP = 4;
4 if(m<2*BP)
5 error(['Operator requires at least ' num2str(2*BP) ' grid points']);
6 end
7
2 e_1=zeros(m,1);e_1(1)=1; 8 e_1=zeros(m,1);e_1(1)=1;
3 e_m=zeros(m,1);e_m(m)=1; 9 e_m=zeros(m,1);e_m(m)=1;
4 10
5 e=ones(m,1); 11 e=ones(m,1);
6 H=spdiags(e,0,m,m); 12 H=spdiags(e,0,m,m);