OptFEM2DP1 Toolbox  V1.2b3
Matlab/Octave Optimized P1-Lagrange Finite Element Method in 2D
 All Files Functions Pages
Functions
MassAssemblingP1base.m File Reference

Assembly of the Mass Matrix by $P_1$-Lagrange finite elements. More...

Go to the source code of this file.

Functions

function M = MassAssemblingP1base (nq, nme, me, areas)
 Assembly of the Mass Matrix by $P_1$-Lagrange finite elements.
 

Detailed Description

Assembly of the Mass Matrix by $P_1$-Lagrange finite elements.

  • Basic version (see report).

Definition in file MassAssemblingP1base.m.

Function Documentation

function M = MassAssemblingP1base (   nq,
  nme,
  me,
  areas 
)

Assembly of the Mass Matrix by $P_1$-Lagrange finite elements.

  • Basic version (see report).

The Mass Matrix $\Masse$ is given by

\[\Masse_{i,j}=\int_\DOMH \FoncBase_i(\q)\, \FoncBase_j(\q)\, d\q,\ \forall (i,j)\in{\ENS{1}{\nq}}^2\]

where $\FoncBase_i$ are $P_1$-Lagrange basis functions.

Example
    Th=SquareMesh(10);
    M=MassAssemblingP1base(Th.nq,Th.nme,Th.me,Th.areas);
See Also
ElemMassMatP1
Copyright
See License issues
Parameters
nqtotal number of nodes of the mesh, also denoted by $\nq$,
nmetotal number of triangles, also denoted by $\nme$,
meConnectivity array, $3\times\nme$ array.
$\me(\jl,k)$ is the storage index of the $\jl$-th vertex of the $k$-th triangle in the array $\q$, $\jl\in\{1,2,3\}$ and $k\in{\ENS{1}{\nme}}$.
areasArray of areas, $1\times\nme$ array. areas(k) is the area of the $k$-th triangle.
Return values
MGlobal mass matrix, $\nq\times\nq$ sparse matrix.

Definition at line 17 of file MassAssemblingP1base.m.