Symmetrically normalize adjacency matrix.
(adj)
| 142 | |
| 143 | |
| 144 | def normalize_adj(adj): |
| 145 | """Symmetrically normalize adjacency matrix.""" |
| 146 | adj = sp.coo_matrix(adj) |
| 147 | rowsum = np.array(adj.sum(1)) |
| 148 | d_inv_sqrt = np.power(rowsum, -0.5).flatten() |
| 149 | d_inv_sqrt[np.isinf(d_inv_sqrt)] = 0. |
| 150 | d_mat_inv_sqrt = sp.diags(d_inv_sqrt) |
| 151 | return adj.dot(d_mat_inv_sqrt).transpose().dot(d_mat_inv_sqrt).tocoo() |
| 152 | |
| 153 | |
| 154 | class EarlyStopping: |