function?Ic?=?adjacency2incidence（A）

%?adjacency2incidence?-?convert?an?adjacency?matrix?to?an?incidence?matrix
%
%???Ic?=?adjacency2incidence（A）;
%
%???A（ij）?=?1?iff?（ij）?is?an?edge?of?the?graph.
%???For?each?edge?number?k?of?the?graph?linking?（ij）
%???????Ic（ik）=1?and?Ic（jk）=-1?
%
%???Ic?is?a?sparse?matrix.
%???Ic?is?also?known?as?the?graph?gradient.
%
%???Copyright?（c）?2006?Gabriel?Peyre

%%?compute?list?of?edges
[ijs]?=?find（sparse（A））;
I?=?find（i<=j）;
i?=?i（I）;
j?=?j（I）;
%?number?of?edges
n?=?length（i）;
%?number?of?vertices
nverts?=?size（A1）;

%%?build?sparse?matrix
s?=?[ones（n1）;?-ones（n1）];
is?=?[（1:n）‘;?（1:n）‘];
js?=?[i（:）;?j（:）];
Ic?=?sparse（isjssnnverts）;
Ic?=?Ic‘;

%?fix?self-linking?problem?（0）
a?=?find（i==j）;
if?not（isempty（a））
????for?t=a‘
????????Ic（i（t）t）?=?1;
????end
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-07-17?09:52??toolbox-graph-master\
?????文件??????????16??2013-07-17?09:52??toolbox-graph-master\.gitignore
?????文件?????????815??2013-07-17?09:52??toolbox-graph-master\adjacency2incidence.m
?????文件?????????511??2013-07-17?09:52??toolbox-graph-master\adjmatrix2list.m
?????文件?????????208??2013-07-17?09:52??toolbox-graph-master\batch_levelsets_meshes.m
?????文件?????????798??2013-07-17?09:52??toolbox-graph-master\build_euclidean_weight_matrix.m
?????文件????????1791??2013-07-17?09:52??toolbox-graph-master\build_graph_from_image.m
?????文件????????5660??2013-07-17?09:52??toolbox-graph-master\bunny.gim.jpg
?????文件?????????669??2013-07-17?09:52??toolbox-graph-master\check_face_vertex.m
?????文件????????1423??2013-07-17?09:52??toolbox-graph-master\check_incircle.m
?????文件????????1633??2013-07-17?09:52??toolbox-graph-master\check_incircle_edge.m
?????文件?????????139??2013-07-17?09:52??toolbox-graph-master\compile_mex.m
?????文件????????1847??2013-07-17?09:52??toolbox-graph-master\compute_boundary.m
?????文件?????????909??2013-07-17?09:52??toolbox-graph-master\compute_combinatorial_laplacian.m
?????文件????????4161??2013-07-17?09:52??toolbox-graph-master\compute_curvature.m
?????文件?????????287??2013-07-17?09:52??toolbox-graph-master\compute_delaunay.m
?????文件????????1611??2013-07-17?09:52??toolbox-graph-master\compute_diffusion_geometry.m
?????文件?????????929??2013-07-17?09:52??toolbox-graph-master\compute_diffusion_kernel.m
?????文件?????????971??2013-07-17?09:52??toolbox-graph-master\compute_distance_graph.m
?????文件????????1103??2013-07-17?09:52??toolbox-graph-master\compute_dual_graph.m
?????文件?????????826??2013-07-17?09:52??toolbox-graph-master\compute_edge_face_ring.m
?????文件?????????770??2013-07-17?09:52??toolbox-graph-master\compute_edges.m
?????文件????????1946??2013-07-17?09:52??toolbox-graph-master\compute_face_ring.m
?????文件????????5583??2013-07-17?09:52??toolbox-graph-master\compute_geometric_laplacian.m
?????文件????????2434??2013-07-17?09:52??toolbox-graph-master\compute_laplacian_curve.m
?????文件????????1065??2013-07-17?09:52??toolbox-graph-master\compute_levelset_mesh.m
?????文件????????1052??2013-07-17?09:52??toolbox-graph-master\compute_mesh_gradient.m
?????文件????????1300??2013-07-17?09:52??toolbox-graph-master\compute_mesh_laplacian.m
?????文件????????2163??2013-07-17?09:52??toolbox-graph-master\compute_mesh_local_covariance.m
?????文件????????2783??2013-07-17?09:52??toolbox-graph-master\compute_mesh_weight.m
?????文件????????1436??2013-07-17?09:52??toolbox-graph-master\compute_normal.m
............此處省略176個文件信息