Both the Python and MATLAB code reads a binary stream (normally a file) and produces a 'data frame' like object. For the Python code, this is a list of objects and for MATLAB this is a struct array.

% node_idx: indices of the nodes to keep (standard: keep all) % tri_idx: indices of the triangles to keep % tet_idx: indices of the tetrahedra to keep % Examples: % m=mesh_extract_regions(m, 'elemtype ...

Abstract: In numerical computation of neuromodulator such as transcranial direct current stimulation (tDCS) and transcranial magnetic stimulation (TMS), the quality of the tetrahedral mesh is a ...