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Work on trainprep.

master
Stanislaw Adaszewski 4 jaren geleden
bovenliggende
commit
a272a17f23
2 gewijzigde bestanden met toevoegingen van 98 en 2 verwijderingen
  1. +77
    -2
      src/decagon_pytorch/data/trainprep.py
  2. +21
    -0
      src/decagon_pytorch/normalize.py

+ 77
- 2
src/decagon_pytorch/data/trainprep.py Bestand weergeven

@@ -1,2 +1,77 @@
def trainprep(data):
pass
from .sampling import fixed_unigram_candidate_sampler
import torch
def train_val_test_split_edges(edges, ratios):
train_ratio, val_ratio, test_ratio = ratios
if train_ratio + val_ratio + test_ratio != 1.0:
raise ValueError('Train, validation and test ratios must add up to 1')
order = torch.randperm(len(edges))
edges = edges[order, :]
n = round(len(edges) * train_ratio)
edges_train = edges[:n]
n_1 = round(len(edges) * (train_ratio + val_ratio))
edges_val = edges[n:n_1]
edges_test = edges[n_1:]
return edges_train, edges_val, edges_test
def prepare_adj_mat(adj_mat, ratios):
degrees = adj_mat.sum(0)
edges_pos = torch.nonzero(adj_mat)
neg_neighbors = fixed_unigram_candidate_sampler(edges_pos[:, 1],
len(edges), degrees, 0.75)
edges_neg = torch.cat((edges_pos[:, 0], neg_neighbors.view(-1, 1)), 1)
edges_pos = (edges_pos_train, edges_pos_val, edges_pos_test) = \
train_val_test_split_edges(edges_pos, ratios)
edges_neg = (edges_neg_train, edges_neg_val, edges_neg_test) = \
train_val_test_split_edges(edges_neg, ratios)
return edges_pos, edges_neg
class PreparedRelation(object):
def __init__(self, node_type_row, node_type_column,
adj_mat_train, adj_mat_train_trans,
edges_pos, edges_neg, edges_pos_trans, edges_neg_trans):
self.adj_mat_train = adj_mat_train
self.adj_mat_train_trans = adj_mat_train_trans
self.edges_pos = edges_pos
self.edges_neg = edges_neg
self.edges_pos_trans = edges_pos_trans
self.edges_neg_trans = edges_neg_trans
def prepare_relation(r, ratios):
adj_mat = r.get_adjacency_matrix(r.node_type_row, r.node_type_column)
edges_pos, edges_neg = prepare_adj_mat(adj_mat)
# adj_mat_train = torch.zeros_like(adj_mat)
# adj_mat_train[edges_pos[0][:, 0], edges_pos[0][:, 0]] = 1
adj_mat_train = torch.sparse_coo_tensor(indices = edges_pos[0].transpose(0, 1),
values=torch.ones(len(edges_pos[0]), dtype=adj_mat.dtype))
if r.node_type_row != r.node_type_col:
adj_mat_trans = r.get_adjacency_matrix(r.node_type_col, r.node_type_row)
edges_pos_trans, edges_neg_trans = prepare_adj_mat(adj_mat_trans)
adj_mat_train_trans = torch.sparse_coo_tensor(indices = edges_pos_trans[0].transpose(0, 1),
values=torch.ones(len(edges_pos_trans[0]), dtype=adj_mat_trans.dtype))
else:
adj_mat_train_trans = adj_mat_trans = \
edge_pos_trans = edge_neg_trans = None
return PreparedRelation(r.node_type_row, r.node_type_column,
adj_mat_train, adj_mat_trans_train,
edges_pos, edges_neg, edges_pos_trans, edges_neg_trans)
def prepare_training(data):
for (node_type_row, node_type_column), rels in data.relation_types:
for r in rels:
prep_relation_edges()

+ 21
- 0
src/decagon_pytorch/normalize.py Bestand weergeven

@@ -33,3 +33,24 @@ def normalize_adjacency_matrix(adj):
coldegree_mat_inv = sp.diags(np.nan_to_num(np.power(colsum, -0.5)).flatten())
adj_normalized = rowdegree_mat_inv.dot(adj).dot(coldegree_mat_inv).tocoo()
return sparse_to_tuple(adj_normalized)
def norm_adj_mat_one_node_type(adj):
adj = sp.coo_matrix(adj)
assert adj.shape[0] == adj.shape[1]:
adj_ = adj + sp.eye(adj.shape[0])
rowsum = np.array(adj_.sum(1))
degree_mat_inv_sqrt = np.power(rowsum, -0.5).flatten()
degree_mat_inv_sqrt = sp.diags(degree_mat_inv_sqrt)
adj_normalized = adj_.dot(degree_mat_inv_sqrt).transpose().dot(degree_mat_inv_sqrt)
return adj_normalized
def norm_adj_mat_two_node_types(adj):
adj = sp.coo_matrix(adj)
rowsum = np.array(adj.sum(1))
colsum = np.array(adj.sum(0))
rowdegree_mat_inv = sp.diags(np.nan_to_num(np.power(rowsum, -0.5)).flatten())
coldegree_mat_inv = sp.diags(np.nan_to_num(np.power(colsum, -0.5)).flatten())
adj_normalized = rowdegree_mat_inv.dot(adj).dot(coldegree_mat_inv).tocoo()
return adj_normalized

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