gf_fem_get¶
Synopsis
n = gf_fem_get(fem F, 'nbdof'[, int cv])
n = gf_fem_get(fem F, 'index of global dof', cv)
d = gf_fem_get(fem F, 'dim')
td = gf_fem_get(fem F, 'target_dim')
P = gf_fem_get(fem F, 'pts'[, int cv])
b = gf_fem_get(fem F, 'is_equivalent')
b = gf_fem_get(fem F, 'is_lagrange')
b = gf_fem_get(fem F, 'is_polynomial')
d = gf_fem_get(fem F, 'estimated_degree')
E = gf_fem_get(fem F, 'base_value',mat p)
ED = gf_fem_get(fem F, 'grad_base_value',mat p)
EH = gf_fem_get(fem F, 'hess_base_value',mat p)
gf_fem_get(fem F, 'poly_str')
string = gf_fem_get(fem F, 'char')
gf_fem_get(fem F, 'display')
Description :
General function for querying information about FEM objects.
Command list :
n = gf_fem_get(fem F, 'nbdof'[, int cv])Return the number of dof for the fem.
Some specific fem (for example ‘interpolated_fem’) may require a convex number cv to give their result. In most of the case, you can omit this convex number.
n = gf_fem_get(fem F, 'index of global dof', cv)Return the index of global dof for special fems such as interpolated fem.
d = gf_fem_get(fem F, 'dim')Return the dimension (dimension of the reference convex) of the fem.
td = gf_fem_get(fem F, 'target_dim')Return the dimension of the target space.
The target space dimension is usually 1, except for vector fem.
P = gf_fem_get(fem F, 'pts'[, int cv])Get the location of the dof on the reference element.
Some specific fem may require a convex number cv to give their result (for example ‘interpolated_fem’). In most of the case, you can omit this convex number.
b = gf_fem_get(fem F, 'is_equivalent')Return 0 if the fem is not equivalent.
Equivalent fem are evaluated on the reference convex. This is the case of most classical fem’s.
b = gf_fem_get(fem F, 'is_lagrange')Return 0 if the fem is not of Lagrange type.
b = gf_fem_get(fem F, 'is_polynomial')Return 0 if the basis functions are not polynomials.
d = gf_fem_get(fem F, 'estimated_degree')Return an estimation of the polynomial degree of the fem.
This is an estimation for fem which are not polynomials.
E = gf_fem_get(fem F, 'base_value',mat p)Evaluate all basis functions of the FEM at point p.
p is supposed to be in the reference convex!
ED = gf_fem_get(fem F, 'grad_base_value',mat p)Evaluate the gradient of all base functions of the fem at point p.
p is supposed to be in the reference convex!
EH = gf_fem_get(fem F, 'hess_base_value',mat p)Evaluate the Hessian of all base functions of the fem at point p.
p is supposed to be in the reference convex!
gf_fem_get(fem F, 'poly_str')Return the polynomial expressions of its basis functions in the reference convex.
The result is expressed as a cell array of strings. Of course this will fail on non-polynomial fem’s.
string = gf_fem_get(fem F, 'char')Ouput a (unique) string representation of the fem.
This can be used to perform comparisons between two different fem objects.
gf_fem_get(fem F, 'display')displays a short summary for a fem object.