03-Feb-2021 09:21:07 tet_mesh_quality_test: MATLAB/Octave version 9.9.0.1467703 (R2020b) Test tet_mesh_quality. 03-Feb-2021 09:21:07 TET_MESH_QUALITY: MATLAB/Octave version 9.9.0.1467703 (R2020b) Compute tet mesh quality measures. Read the header of "cube_nodes.txt". Spatial dimension DIM_NUM = 3 Number of points NODE_NUM = 8 Read the data in "cube_nodes.txt". 5 by 5 portion of data read from file: Row: 1 2 3 Col 1 0.000000 0.000000 0.000000 2 0.000000 0.000000 1.000000 3 0.000000 1.000000 0.000000 4 0.000000 1.000000 1.000000 5 1.000000 0.000000 0.000000 Read the header of "cube_elements.txt". Tetrahedron order = 4 Number of tetras = 6 Read the data in "cube_elements.txt". Portion of TETRA_NODE: Row: 1 2 3 4 Col 1 4 3 5 1 2 4 2 5 1 3 4 7 3 5 4 4 7 8 5 5 4 6 2 5 6 4 6 8 5 MESH_BASE_ONE: The element indexing appears to be 1-based! No conversion is necessary. Measure Minimum Mean Maximum Variance 1 0.717439 0.717439 0.717439 0.000000 2 0.585786 0.585786 0.585786 0.000000 3 0.755953 0.755953 0.755953 0.000000 4 0.479584 0.479584 0.479584 0.000000 5 1.000000 1.000000 1.000000 0.000000 Here is a numerical histogram of the "order" of each node in the mesh, that is, the number of tetrahedrons that include that node as a vertex. For a regular mesh, most nodes would have the same order. Order Number of Nodes 2 6 6 2 TET_MESH_QUALITY: Normal end of execution. 03-Feb-2021 09:21:07 tet_mesh_quality_test: Normal end of execution. 03-Feb-2021 09:21:07