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view +time/+rkparameters/rk4.m @ 856:ee4cfb37534d feature/poroelastic

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Merge with feature/d1_staggered to get RK timestepper for discrete data.
author Martin Almquist <malmquist@stanford.edu>
date Tue, 02 Oct 2018 13:39:10 -0700
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function [a,b,c,s] = rk4()

% Butcher tableau for classical RK$
s = 4;
a = sparse(s,s);
a(2,1) = 1/2;
a(3,2) = 1/2;
a(4,3) = 1;
b = 1/6*[1; 2; 2; 1];
c = [0; 1/2; 1/2; 1];

end