Mercurial > repos > public > sbplib

view +time/+rkparameters/rk4.m @ 966:4a85cff53107 feature/poroelastic

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix bug in Elastic2dVariable that caused crash for m_x neq m_y
author Martin Almquist <malmquist@stanford.edu>
date Sat, 22 Dec 2018 18:08:51 +0100
parents ee4cfb37534d
children
line wrap: on
line source

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