setup_id_lm.m

来自「The Finite Element Method Usign MATLAB.p」· M 代码 · 共 23 行

% setup ID and LM arrays
function  d = setup_ID_LM(d);
include_flags;

count = 0; count1 = 0;   
for i = 1:neq
    if flags(i) == 2            % check if a node on essential boundary   
        count   = count + 1;    
        ID(i)   = count;        % number nodes on essential boundary first
        d(count)= e_bc(i);      % store reordered essential B.C.
    else
        count1 = count1 + 1;
        ID(i) = nd + count1;   
    end
end


for i = 1:nel
    for j = 1:nen
        LM(j,i)=ID(IEN(j,i));   % create the LM matrix
    end
end