| OptFEM2DP1 Toolbox 1.2b4 Matlab/Octave Optimized P1-Lagrange Finite Element Method in 2D

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base/ElemMassMatP1.m
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    00001 function AElem=ElemMassMatP1(area)
    00002 % function AElem=ElemMassMat(area)
    00003 %   Computation of the element mass matrix for
    00004 %  `P_1`-Lagrange finite elements
    00005 %
    00006 % Parameters:
    00007 %  area: triangle area
    00008 %
    00009 % Return values:
    00010 %  AElem: Element mass matrix, `3\times 3` matrix
    00011 % ``AElem=\frac{area}{12}\left( \begin{array}{ccc}
    00012 %  2 &1 &1 \\
    00013 %  1 &2 &1 \\
    00014 %  1 &1 &2
    00015 %  \end{array} \right)``
    00016 %
    00017 % Example:
    00018 %  @verbatim
    00019 %    area=1/2.;
    00020 %    AElem=ElemMassMatP1(area);
    00021 %  @endverbatim
    00022 % Copyright:
    00023 %   See \ref license
    00024 AElem=(area/12)*[2 1 1; 1 2 1; 1 1 2];

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