Description

PNTSET Set Dirichlet point constraints.

[ F, INDROW, AMAT, T ] = PNTSET( PROB, F, AMAT, ISYMM, SET_NULL ) Sets Dirichlet point constraints conditions in the right hand side load vector F and global matrix AMAT with the information in the finite element problem struct PROB.

Input       Value/(Size)           Description
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prob        struct                 Finite element problem struct
f           (neq,1)                Right hand side/load vector
amat        (n_a,n_a)              System matrix (sparse or triplet format)
isymm       scalar/{0}             Symmetrize BCs if applicable.
set_null    scalar/{0}             Set zeros in f vector.
                                                                                  .
Output      Value/(Size)           Description
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f           (neq,1)                Modified right hand side/load vector
indrow      (neq,1)                Index to rows (dofs) in rhs which were set
amat        (n_a,n_a)              Modified system matrix
t           scalar                 Time spent in function