This namespace offers functions to calculate expansion series of the solution on the reference element. Coefficients of expansion are often used to estimate local smoothness of the underlying FiniteElement field to decide on h- or p-adaptive refinement strategy.
Calculate the
norm of subsets of
coefficients defined by
predicate being constant. Return the pair of vectors of predicate values and the vector of calculated subset norms.
predicate should return a pair of
bool and
unsigned int. The former is a flag whether a given TableIndices should be used in calculation, whereas the latter is the unrolled value of indices according to which the subsets of coefficients will be formed.
Only those coefficients will be considered which are larger than
smallest_abs_coefficient.
norm_typeare implemented and make sense in this case: mean, L1_norm, L2_norm, Linfty_norm. The mean norm ca only be applied to real valued coefficients.
Linear regression least-square fit of \(y = k \, x + b\). The size of the input vectors should be equal and more than 1. The returned pair will contain \(k\) (first) and \(b\) (second).
Definition at line 30 of file fe_series.cc.