def dim_survey(X, entry_id):
# convert to numpy
X = np.array(X)
# run the reduction.
X_pca = PCA(n_components=3).fit_transform(X)
X_tsne = TSNE(n_components=3).fit_transform(X)
X_ica = FastICA(n_components=3).fit_transform(X)
# connect to db.
with mongoctx() as db:
# update the stuff.
db['entry'].update(
{
'_id': ObjectId(entry_id)
},
{
'$set': {
'pca': X_pca.tolist(),
'tsne': X_tsne.tolist(),
'ica': X_ica.tolist(),
}
}
)
def execute(self):
X = self.X
#X = np.array(self.X)
#print("XXn",len(X))
X2 = TSNE(n_components=self.p, random_state=7,
perplexity=40).fit_transform(X)
return X2.tolist()
def get_2d_projection(articles):
vectors = get_wordvecs(articles)
vocab = [word for word in vectors.vocab]
wordvecs = []
for word in vocab:
wordvecs.append(vectors[word])
embedded = TSNE(n_components=2).fit_transform(wordvecs)
return embedded.tolist(), vocab
def proj_docs(corpus, n_components=2):
"""文档投影"""
features = matutils.corpus2dense(corpus['tfidfcorpus'],
num_terms=len(
corpus['dictionary'].keys()),
num_docs=len(corpus['doc2bow'])).T
proj_data = TSNE(n_components=n_components,
random_state=0).fit_transform(features)
proj_data = np.array(proj_data, dtype='float')
return proj_data.tolist()
def proj_docs(self, n_components=2):
"""文档投影"""
features = matutils.corpus2dense(self.__tfidf_corpus,
num_terms=len(
self.__dictionary.keys()),
num_docs=len(self.corpus)).T
proj_data = TSNE(n_components=n_components,
random_state=0).fit_transform(features)
proj_data = np.array(proj_data, dtype='float')
# return np.around(proj_data, 5).tolist()
return proj_data.tolist()
def evaluate(self, dataset):
"""
Evaluate the passed network on the given dataset for the Context retoration task.
----------
INPUT
|---- dataset (torch.utils.data.Dataset) the dataset to use for evaluation. It should output the original image,
| and the sample index.
OUTPUT
|---- None
"""
logger = logging.getLogger()
# make loader
loader = torch.utils.data.DataLoader(dataset, batch_size=self.batch_size, shuffle=False,
num_workers=self.num_workers, worker_init_fn=lambda _: np.random.seed())
# put net on device
self.net = self.net.to(self.device)
# Evaluate
logger.info('Start Evaluating the context restoration model.')
start_time = time.time()
idx_repr = [] # placeholder for bottleneck representation
n_batch = len(loader)
self.net.eval()
with torch.no_grad():
for b, data in enumerate(loader):
# get data : load in standard way (no patch swaped image)
input, idx = data
input = input.to(self.device).float()
idx = idx.to(self.device)
# get representation
self.net.return_bottleneck = True
_, repr = self.net(input)
# down sample representation for reduced memory impact
repr = nn.AdaptiveAvgPool2d((4,4))(repr)
# add ravelled representations to placeholder
idx_repr += list(zip(idx.cpu().data.tolist(), repr.view(repr.shape[0], -1).cpu().data.tolist()))
# print_progress
if self.print_progress:
print_progessbar(b, n_batch, Name='\t\tEvaluation Batch', Size=40, erase=True)
# reset the network attriubtes
self.net.return_bottleneck = False
# compute tSNE for representation
idx, repr = zip(*idx_repr)
repr = np.array(repr)
logger.info('Computing the t-SNE representation.')
repr_2D = TSNE(n_components=2).fit_transform(repr)
self.outputs['eval']['repr'] = list(zip(idx, repr_2D.tolist()))
logger.info('Succesfully computed the t-SNE representation.')
# finish evluation
self.outputs['eval']['time'] = time.time() - start_time
logger.info(f"Finished evaluating on the context restoration task in {timedelta(seconds=int(self.outputs['eval']['time']))}")
def get_2d_projection(articles, filter):
vectors = get_wordvecs(articles)
vocab = []
for word in vectors.index_to_key:
if filter.isValid(word):
vocab.append(word)
wordvecs = []
for word in vocab:
wordvecs.append(vectors[word])
#print("start compressing")
embedded = TSNE(n_components=2).fit_transform(wordvecs)
#print("end compressing")
return embedded.tolist(), vocab
def evaluate(self, dataset):
"""
Evaluate the network on the given dataset for the Contrastive task (get t-SNE representation of samples). Only if global task.
----------
INPUT
|---- dataset (torch.utils.data.Dataset) the dataset to use for evaluation. It should output the original image,
| and the sample index.
OUTPUT
|---- None
"""
if self.is_global:
logger = logging.getLogger()
# initiliatize Dataloader
loader = torch.utils.data.DataLoader(dataset, batch_size=self.batch_size, shuffle=False, num_workers=self.num_workers,
worker_init_fn=lambda _: np.random.seed())
# Evaluate
logger.info("Start Evaluating the network on global contrastive task.")
start_time = time.time()
idx_repr = [] # placeholder for bottleneck representation
n_batch = len(loader)
self.net.eval()
self.net.return_bottleneck = True
with torch.no_grad():
for b, data in enumerate(loader):
im, idx = data
im = im.to(self.device).float()
idx = idx.to(self.device)
# get representations
_, z = self.net(im)
# keep representations (bottleneck)
idx_repr += list(zip(idx.cpu().data.tolist(), z.squeeze().cpu().data.tolist()))
# print_progress
if self.print_progress:
print_progessbar(b, n_batch, Name='\t\tEvaluation Batch', Size=40, erase=True)
# reset the network attriubtes
self.net.return_bottleneck = False
# compute tSNE for representation
idx, repr = zip(*idx_repr)
repr = np.array(repr)
logger.info('Computing the t-SNE representation.')
repr_2D = TSNE(n_components=2).fit_transform(repr)
self.outputs['eval']['repr'] = list(zip(idx, repr_2D.tolist()))
logger.info('Succesfully computed the t-SNE representation.')
# finish evluation
self.outputs['eval']['time'] = time.time() - start_time
logger.info(f"Finished evaluating of encoder on the global contrastive task in {timedelta(seconds=int(self.outputs['eval']['time']))}")
else:
warnings.warn("Evaluation is only possible with a global contrastive task.")
def tsne_embed(embedding_container):
"""
Function to run TSNE on list of embeddings contained in embedding_c
ontainer.
Returns:
points:
List of python dicts of format
points [
{
x: str(float),
y: str(float),
z: str(float)
},
{
x: str(float),
y: str(float),
z: str(float)
}
{
...
} ...
]
"""
embeddings = np.array(embedding_container)
tsne_output = TSNE(n_components=3).fit_transform(embeddings)
tsne_output_list = tsne_output.tolist()
# Makes an array of dictionaries of points
points = []
for tsne_point in tsne_output_list:
point_dict = {
'x': tsne_point[0],
'y': tsne_point[1],
'z': tsne_point[2]
}
points.append(point_dict)
return points
def transGraphToMatrixAndtSNE(path):
f_r = open(path, 'r')
f_w = open('trans_query_graph_to_matrix2.txt', 'w+')
allLine = f_r.readlines()
seq = 0
result = []
while seq < len(allLine):
line = allLine[seq].strip().split()
if line[0] == 't':
print(str(line[2]))
seq += 1
result = [[0 for i in range(836)] for j in range(836)]
line2 = allLine[seq].strip().split()
while line2[0] == 'v':
seq += 1
line2 = allLine[seq].strip().split()
while line2[0] == 'e':
result[int(line2[2])][int(line2[3])] = 1
result[int(line2[3])][int(line2[2])] = 1
seq += 1
if seq < len(allLine):
line2 = allLine[seq].strip().split()
else:
break
matrix = np.array(result)
matrix_embedded = TSNE(n_components=1).fit_transform(matrix)
matrix_embedded = np.hstack((matrix_embedded))
matrix_embedded = matrix_embedded.tolist()
restr = ''
for i in range(836):
restr = restr + '{:.2f}'.format(matrix_embedded[i]) + ' '
restr += '\n'
f_w.write(restr)
f_w.close()
f_r.close()
print("end")
def evaluate(self,
net,
dataset,
print_to_logger=True,
return_auc=False,
save_tSNE=True):
"""
Evaluate the natwork on the provided dataset.
----------
INPUT
|---- net (nn.Module) The autoencoder to train. It must return two
| embedding (after the convolution and after the MLP) as
| well as the reconstruction
|---- dataset (torch.utils.data.Dataset) the dataset on which the
| network is validated. It must return an image and a mask
| of where the loss is to be computed.
|---- print_to_logger (bool) whether to print info in logger.
|---- return_auc (bool) whether to return the computed AUC.
|---- save_tSNE (bool) whether to save the intermediate representation
| as a 2D vector using tSNE.
OUTPUT
|---- None
"""
if print_to_logger:
logger = logging.getLogger()
# make dataloader (with drop_last = True to ensure that the loss can be computed)
loader = torch.utils.data.DataLoader(dataset,
batch_size=self.batch_size,
shuffle=True,
num_workers=self.n_job_dataloader)
# put net on device
net = net.to(self.device)
# define loss function
loss_fn = MaskedMSELoss(reduction='none')
if print_to_logger:
logger.info("Start Evaluating AE.")
idx_label_scores = []
n_batch = len(loader)
net.eval()
with torch.no_grad():
for b, data in enumerate(loader):
input, label, mask, semi_label, idx = data
# put inputs to device
input = input.to(self.device).float().requires_grad_(True)
label = label.to(self.device)
mask = mask.to(self.device)
semi_label = semi_label.to(self.device)
idx = idx.to(self.device)
h, z, rec = net(input)
# compute score as mean loss over by sample
rec_loss = loss_fn(rec, input, mask)
score = torch.mean(rec_loss, dim=tuple(range(1, rec.dim())))
# append scores : idx label score h z
idx_label_scores += list(
zip(idx.cpu().data.numpy().tolist(),
label.cpu().data.numpy().tolist(),
score.cpu().data.numpy().tolist(),
h.cpu().data.numpy().tolist(),
z.cpu().data.numpy().tolist()))
if self.print_batch_progress:
print_progessbar(b,
n_batch,
Name='\t\tEvaluation Batch',
Size=40,
erase=True)
if save_tSNE:
if print_to_logger:
logger.info("Computing the t-SNE representation.")
# Apply t-SNE transform on embeddings
index, label, scores, h, z = zip(*idx_label_scores)
h, z = np.array(h), np.array(z)
h = TSNE(n_components=2).fit_transform(h)
z = TSNE(n_components=2).fit_transform(z)
self.eval_repr = list(
zip(index, label, scores, h.tolist(), z.tolist()))
if print_to_logger:
logger.info("Succesfully computed the t-SNE representation ")
if return_auc:
_, label, scores, _, _ = idx_label_scores
auc = roc_auc_score(np.array(label), np.array(scores))
return auc
def evaluate(self,
dataset,
net,
save_tSNE=False,
return_loss=True,
print_to_logger=True):
"""
"""
if print_to_logger:
logger = logging.getLogger()
# make dataloader (with drop_last = True to ensure that the loss can be computed)
loader = torch.utils.data.DataLoader(dataset,
batch_size=self.batch_size,
shuffle=True,
num_workers=self.n_job_dataloader,
drop_last=True)
# put net on device
net = net.to(self.device)
# define loss function, supervised or self-supervised
if self.supervised_loss:
loss_fn = SupervisedContrastiveLoss(self.tau,
self.batch_size,
y_list=[1],
device=self.device)
else:
loss_fn = NT_Xent_loss(self.tau,
self.batch_size,
device=self.device)
if print_to_logger:
logger.info("Start Evaluating SimCLR.")
net.eval()
with torch.no_grad():
sum_loss = 0.0
idx_h_z = []
n_batch = len(loader)
for b, data in enumerate(loader):
# get input
input_1, input_2, semi_label, idx = data
input_1 = input_1.to(self.device).float()
input_2 = input_2.to(self.device).float()
semi_label = semi_label.to(self.device)
idx = idx.to(self.device)
# forward
h_1, z_1 = net(input_1)
h_2, z_2 = net(input_2)
# normalize
z_1 = F.normalize(z_1, dim=1)
z_2 = F.normalize(z_2, dim=1)
# compute loss
if self.supervised_loss:
y = torch.where(
semi_label == -1, torch.ones_like(semi_label),
torch.zeros_like(semi_label)
) # generate labels (1 if known abnormal, else it's considered normal)
loss = loss_fn(z_1, z_2, y)
else:
loss = loss_fn(z_1, z_2)
sum_loss += loss.item()
# save embeddings
if save_tSNE:
idx_h_z += list(
zip(idx.cpu().data.numpy().tolist(),
h_1.cpu().data.numpy().tolist(),
z_1.cpu().data.numpy().tolist()))
if self.print_batch_progress:
print_progessbar(b,
n_batch,
Name='\t\tEvaluation Batch',
Size=40,
erase=True)
if save_tSNE:
if print_to_logger:
logger.info("Computing the t-SNE representation.")
# Apply t-SNE transform on embeddings
index, h, z = zip(*idx_h_z)
h, z = np.array(h), np.array(z)
h = TSNE(n_components=2).fit_transform(h)
z = TSNE(n_components=2).fit_transform(z)
self.eval_repr = list(zip(index, h.tolist(), z.tolist()))
if print_to_logger:
logger.info("Succesfully computed the t-SNE representation ")
if return_loss:
return loss / n_batch
def evaluate(self, dataset, save_tsne=False, return_scores=False):
"""
Evaluate the passed network on the given dataset for the Context retoration task.
----------
INPUT
|---- dataset (torch.utils.data.Dataset) the dataset to use for evaluation. It should output the original image,
| and the sample index.
|---- save_tsne (bool) whether to compute and store in self.outputs the tsne representation of the feature map
| after the average pooling layer and before the MLP
|---- return_scores (bool) whether to return the measured ROC AUC, accuracy, recall, precision and f1-score.
OUTPUT
|---- (auc) (float) the ROC AUC on the dataset.
|---- (acc) (float) the accuracy on the dataset.
|---- (recall) (float) the recall on the dataset.
|---- (precision) (float) the precision on the dataset.
|---- (f1) (float) the f1-score on the dataset.
"""
logger = logging.getLogger()
# make loader
loader = torch.utils.data.DataLoader(
dataset,
batch_size=self.batch_size,
shuffle=False,
num_workers=self.num_workers,
worker_init_fn=lambda _: np.random.seed())
# put net on device
self.net = self.net.to(self.device)
# Evaluate
start_time = time.time()
idx_repr = [] # placeholder for bottleneck representation
idx_label_pred = [] # placeholder for label & prediction
n_batch = len(loader)
self.net.eval()
with torch.no_grad():
for b, data in enumerate(loader):
# get data : load in standard way (no patch swaped image)
input, label, idx = data
input = input.to(self.device).float()
label = label.to(self.device).float()
idx = idx.to(self.device)
if save_tsne:
# get representation
self.net.return_bottleneck = True
pred_score, repr = self.net(input)
pred_score = torch.sigmoid(pred_score)
pred = torch.where(
pred_score > 0.5,
torch.ones_like(pred_score, device=self.device),
torch.zeros_like(pred_score, device=self.device))
# down sample representation for reduced memory impact
#repr = nn.AdaptiveAvgPool2d((4,4))(repr)
# add ravelled representations to placeholder
idx_repr += list(
zip(idx.cpu().data.tolist(),
repr.view(repr.shape[0], -1).cpu().data.tolist()))
idx_label_pred += list(
zip(idx.cpu().data.tolist(),
label.cpu().data.tolist(),
pred.cpu().data.tolist(),
pred_score.cpu().data.tolist())
) # pred score is softmax activation of class 1
else:
pred_score = self.net(input)
pred_score = torch.sigmoid(pred_score) # B x N_class
pred = torch.where(
pred_score > 0.5,
torch.ones_like(pred_score, device=self.device),
torch.zeros_like(pred_score, device=self.device))
idx_label_pred += list(
zip(idx.cpu().data.tolist(),
label.cpu().data.tolist(),
pred.cpu().data.tolist(),
pred_score.cpu().data.tolist()))
# print_progress
if self.print_progress:
print_progessbar(b,
n_batch,
Name='\t\tEvaluation Batch',
Size=50,
erase=True)
# reset the network attriubtes
if save_tsne:
self.net.return_bottleneck = False
# compute tSNE for representation
if save_tsne:
idx, repr = zip(*idx_repr)
repr = np.array(repr)
logger.info('Computing the t-SNE representation.')
repr_2D = TSNE(n_components=2).fit_transform(repr)
self.outputs['eval']['repr'] = list(zip(idx, repr_2D.tolist()))
logger.info('Succesfully computed the t-SNE representation.')
# Compute Accuracy
_, label, pred, pred_score = zip(*idx_label_pred)
label, pred, pred_score = np.array(label), np.array(pred), np.array(
pred_score)
auc = roc_auc_score(label, pred_score, average=self.score_average)
acc = accuracy_score(label.ravel(), pred.ravel())
sub_acc = accuracy_score(label, pred)
recall = recall_score(label, pred, average=self.score_average)
precision = precision_score(label, pred, average=self.score_average)
f1 = f1_score(label, pred, average=self.score_average)
self.outputs['eval']['auc'] = auc
self.outputs['eval']['acc'] = acc
self.outputs['eval']['subset_acc'] = sub_acc
self.outputs['eval']['recall'] = recall
self.outputs['eval']['precision'] = precision
self.outputs['eval']['f1'] = f1
self.outputs['eval']['pred'] = idx_label_pred
# finish evluation
self.outputs['eval']['time'] = time.time() - start_time
if return_scores:
return auc, acc, sub_acc, recall, precision, f1
def tsne(comp, perp, lr, init):
print "N_components (fed to SVD) :", comp
print "Perplexity (fed to TSNE) :", perp
print "learning_rate (fed to TSNE) :", lr
print "init(fed to TSNE) :", init
X_reduced = TruncatedSVD(n_components=50,
random_state=0).fit_transform(vectors)
X_embedded = TSNE(n_components=comp,
perplexity=perp,
verbose=2,
learning_rate=lr,
init=init).fit_transform(X_reduced)
# width and height of image
iw = 16
ih = 9
fig = plt.figure(figsize=(iw, ih))
fig.patch.set_facecolor('white')
ax = plt.axes(frameon=False)
plt.setp(ax, xticks=(), yticks=())
plt.subplots_adjust(left=0.0,
bottom=0.0,
right=1.0,
top=0.9,
wspace=0.0,
hspace=0.0)
plt.scatter(X_embedded[:, 0], X_embedded[:, 1], c='black', marker=".")
fig.savefig("img/" + datetime.datetime.now().strftime('%Y-%m-%d_%Hh%M') +
"_TSNE_LYRICS_NO_ANNOTATION" + type_of_run + "_perp" +
str(perp) + "_comp" + str(comp) + "_lr" + str(lr) + "_" +
str(init) + "_300dpi_1wh.png",
transparent=False,
dpi=300)
fig = plt.figure(figsize=(iw * 2, ih * 2))
fig.patch.set_facecolor('white')
ax = plt.axes(frameon=False)
plt.setp(ax, xticks=(), yticks=())
plt.subplots_adjust(left=0.0,
bottom=0.0,
right=1.0,
top=0.9,
wspace=0.0,
hspace=0.0)
plt.scatter(X_embedded[:, 0], X_embedded[:, 1], c='black', marker=".")
fig.savefig("img/" + datetime.datetime.now().strftime('%Y-%m-%d_%Hh%M') +
"_TSNE_LYRICS_NO_ANNOTATION" + type_of_run + "_perp" +
str(perp) + "_comp" + str(comp) + "_lr" + str(lr) + "_" +
str(init) + "_300dpi_2wh.png",
transparent=False,
dpi=300)
fig = plt.figure(figsize=(iw * 3, ih * 3))
fig.patch.set_facecolor('white')
ax = plt.axes(frameon=False)
plt.setp(ax, xticks=(), yticks=())
plt.subplots_adjust(left=0.0,
bottom=0.0,
right=1.0,
top=0.9,
wspace=0.0,
hspace=0.0)
plt.scatter(X_embedded[:, 0], X_embedded[:, 1], c='black', marker=".")
fig.savefig("img/" + datetime.datetime.now().strftime('%Y-%m-%d_%Hh%M') +
"_TSNE_LYRICS_NO_ANNOTATION" + type_of_run + "_perp" +
str(perp) + "_comp" + str(comp) + "_lr" + str(lr) + "_" +
str(init) + "_300dpi_3wh.png",
transparent=False,
dpi=300)
X = X_embedded.tolist()
for idx, x in enumerate(X):
x.extend([authors[idx], titles[idx], ids[idx]])
#print X
# SAVE to txt file as csv for later import to d3
txt_fn = datetime.datetime.now().strftime(
'%Y-%m-%d_%Hh%M') + "_LYRICS_TSNE_" + type_of_run + "_perp" + str(
perp) + "_comp" + str(comp) + "_lr" + str(lr) + "_" + str(
init) + ".txt"
txt_fn_path = "txt/" + txt_fn
f_txt = open(txt_fn_path, 'w')
f_txt.write("x,y,author,title,id")
for x in X:
f_txt.write("\n")
for idx, item in enumerate(x):
if idx == 4:
f_txt.write("\"%s\"" % item)
elif type(item) is str:
f_txt.write("\"%s\"," % item)
else:
f_txt.write("%s," % item)
f_txt.close()
"\nTXT file created at:", txt_fn_path
class QueryData(dict):
def __init__(self, query, labels=[], vectors=[]):
self.query = query
self.labels = labels
self.distances = []
self.vectors = vectors
self.vocab_size = 0
self.query_size = 0
self.parsed_positive = []
self.parsed_negative = []
self.dim_embedded = []
self.embedding = []
self.cluster_data = []
self.cluster_centroids = []
def clear_data(self):
self.distances.clear()
self.labels.clear()
self.vectors.clear()
self.parsed_positive.clear()
self.parsed_negative.clear()
self.dim_embedded.clear()
self.cluster_data.clear()
self.cluster_centroids.clear()
def _closest_node(self, node, nodes):
nodes = np.asarray(nodes)
dist_2 = np.sum((nodes - node)**2, axis=1)
return np.argmin(dist_2)
def dim_reduce(self):
self.dim_embedded = TSNE(n_components=2).fit_transform(
np.array(self.vectors, dtype=np.float64))
self.embedding = self.dim_embedded.tolist()
def cluster(self, num_clusters):
clustering = KMeans(n_clusters=num_clusters).fit(self.dim_embedded)
cluster_labels = clustering.labels_.tolist()
centroids = clustering.cluster_centers_.tolist()
for cluster_id in range(num_clusters):
closest_node = self._closest_node(centroids[cluster_id],
self.dim_embedded)
closest_node_word = self.labels[closest_node]
self.cluster_centroids.append({
'x': centroids[cluster_id][0],
'y': centroids[cluster_id][1],
'label': cluster_labels[cluster_id],
'word': closest_node_word
})
embedding = self.dim_embedded.tolist()
for item in range(len(cluster_labels)):
self.cluster_data.append({
'x': embedding[item][0],
'y': embedding[item][1],
'label': cluster_labels[item]
})
def to_dict(self):
result = {
'query': self.query,
'labels': self.labels,
'vocab_size': self.vocab_size,
'query_size': self.query_size,
'centroids': self.cluster_centroids,
'cluster_data': self.cluster_data
}
return result
class Exploration():
def __init__(self, query, labels=[], vectors=[]):
self.query = query
self.parsed_query = {}
self.labels = labels
self.vectors = vectors
self.reduction = []
self.clusters = []
self.distances = []
self.stats = {}
def reduce(self):
print('Performing tSNE reduction ' +
'on {} vectors'.format(len(self.vectors)))
self.reduction = TSNE(n_components=2, verbose=1).fit_transform(
np.array(self.vectors, dtype=np.float64)) # slower than below
# replaced below tsne with scikit's above
# self.reduction = bh_sne(np.array(self.vectors, dtype=np.float64))
def cluster(self, num_clusters=30):
clustering = KMeans(n_clusters=num_clusters)
clustering.fit(self.reduction)
self.clusters = clustering.labels_
clustermatrix = []
reduction = self.reduction.tolist()
for cluster_id in range(num_clusters):
clustermatrix.append([
reduction[i] for i in range(len(self.vectors))
if self.clusters[i] == cluster_id
])
self.cluster_centroids = clustering.cluster_centers_.tolist()
self.cluster_centroids_closest_nodes = []
for cluster_id in range(num_clusters):
nodes_for_cluster = clustermatrix[cluster_id]
centroid = self.cluster_centroids[cluster_id]
closest_node_to_centroid = self._closest_node(
centroid, nodes_for_cluster)
coords = nodes_for_cluster[closest_node_to_centroid]
node_id = reduction.index(coords)
self.cluster_centroids_closest_nodes.append(node_id)
def serialize(self):
result = {
'query': self.query,
'parsed_query': self.parsed_query,
'labels': self.labels,
'stats': self.stats
}
if len(self.reduction) > 0:
result['reduction'] = self.reduction.tolist()
if len(self.distances) > 0:
result['distances'] = self.distances
if len(self.clusters) > 0:
result['clusters'] = self.clusters.tolist()
result['cluster_centroids'] = self.cluster_centroids
closest_nodes = self.cluster_centroids_closest_nodes
result['cluster_centroids_closest_nodes'] = closest_nodes
return result
def _closest_node(self, node, nodes):
nodes = np.asarray(nodes)
dist_2 = np.sum((nodes - node)**2, axis=1)
return np.argmin(dist_2)
def tsne(self, X):
X2 = TSNE(n_components=2, random_state=0,
perplexity=40).fit_transform(X)
return X2.tolist()
plt.scatter(X_embedded[:, 0], X_embedded[:, 1], s=size_array[:],
c='black', marker=".", alpha=1)
fig.savefig("img/"+save_PATH+"/TSNE_SONDHEIM_{0:05d}.png".format(iters), transparent=True, figsize=(16.0, 9.0), dpi=320)
print("IMAGE saved at: img/"+save_PATH+"/TSNE_SONDHEIM_{0:05d}.png".format(iters))
# for i, a in enumerate(txt_fn):
# ax.annotate(a, (X_embedded[:, 0][i], X_embedded[:, 1][i]))
# #ax.annotate(a+"\n'"+titles[i]+"'", (X_embedded[:, 0][i], X_embedded[:, 1][i]))
# #plt.show()
# fig.savefig("img/"+save_PATH+"/"+str(iters)+"_TSNE_SONDHEIM_ANNOTATED.png", transparent=False, figsize=(16.0, 9.0), dpi=320)
X = X_embedded.tolist()
for idx,x in enumerate(X):
x.extend([ids[idx]])
# SAVE to txt file as csv for later import to d3
#txt_fn = datetime.datetime.now().strftime('%Y-%m-%d_%Hh%M')+"_SONDHEIM_TSNE_"+str(complexity_INIT)+"_"+str(n_comp)+"_"+str(perp)+"_"+str(lr)+"_"+str(exag)+"_num_iter"+str(num_iter)+".txt"
txt_fn = "LR{}_EXAG{}_C{}_LAYERS{}_P{}.txt".format(lr,exag,complexity_INIT,n_comp,perp)
txt_fn_path = txt_save_PATH+txt_fn
f_txt=open(txt_fn_path,'w')
f_txt.write("x,y,id,s")
inc=0
for x in X:
def evaluate(self,
dataset,
net,
save_tSNE=False,
return_loss=True,
print_to_logger=True):
"""
Evaluate the Contrative network on the provided dataset.
----------
INPUT
|---- net (nn.Module) The Encoder network to validate.
|---- dataset (torch.utils.data.Dataset) the dataset on which the
| network is evaluated.
|---- print_to_logger (bool) whether to print in the logger.
|---- save_tSNE (bool) whether to save a 2D t-SNE representation of
| the embeded data points
|---- return_loss (bool) whether to return the validation loss.
OUTPUT
|---- (auc) (float) the validation loss if required.
"""
if print_to_logger:
logger = logging.getLogger()
# make dataloader (with drop_last = True to ensure that the loss can be computed)
loader = torch.utils.data.DataLoader(dataset,
batch_size=self.batch_size,
shuffle=True,
num_workers=self.n_job_dataloader,
drop_last=True)
# put net on device
net = net.to(self.device)
# define loss function
loss_fn = InfoNCE_loss(self.tau, self.batch_size, device=self.device)
if print_to_logger:
logger.info("Start Evaluating Contrastive.")
net.eval()
with torch.no_grad():
sum_loss = 0.0
idx_h_z = []
n_batch = len(loader)
for b, data in enumerate(loader):
# get input
input_1, input_2, _, idx = data
input_1 = input_1.to(self.device).float()
input_2 = input_2.to(self.device).float()
idx = idx.to(self.device)
# forward
h_1, z_1 = net(input_1)
h_2, z_2 = net(input_2)
# normalize
z_1 = F.normalize(z_1, dim=1)
z_2 = F.normalize(z_2, dim=1)
# compute loss
loss = loss_fn(z_1, z_2)
sum_loss += loss.item()
# save embeddings
if save_tSNE:
idx_h_z += list(
zip(idx.cpu().data.numpy().tolist(),
h_1.cpu().data.numpy().tolist(),
z_1.cpu().data.numpy().tolist()))
if self.print_batch_progress:
print_progessbar(b,
n_batch,
Name='\t\tEvaluation Batch',
Size=40,
erase=True)
if save_tSNE:
if print_to_logger:
logger.info("Computing the t-SNE representation.")
# Apply t-SNE transform on embeddings
index, h, z = zip(*idx_h_z)
h, z = np.array(h), np.array(z)
h = TSNE(n_components=2).fit_transform(h)
z = TSNE(n_components=2).fit_transform(z)
self.eval_repr = list(zip(index, h.tolist(), z.tolist()))
if print_to_logger:
logger.info("Succesfully computed the t-SNE representation ")
if return_loss:
return loss / n_batch
def evaluate(self,
net,
dataset,
return_auc=False,
print_to_logger=True,
save_tSNE=True):
"""
Evaluate the DSAD network on the provided dataset.
----------
INPUT
|---- net (nn.Module) The DeepSAD network to validate.
|---- dataset (torch.utils.data.Dataset) the dataset on which the
| network is evaluated.
|---- net (nn.Module) The DeepSAD network to validate.
|---- return_auc (bool) whether to return the computed auc or not.
|---- print_to_logger (bool) whether to print in the logger.
|---- save_tSNE (bool) whether to save a 2D t-SNE representation of
| the embeded data points
OUTPUT
|---- None
"""
if print_to_logger:
logger = logging.getLogger()
# make dataloader
loader = torch.utils.data.DataLoader(dataset,
batch_size=self.batch_size,
shuffle=True,
num_workers=self.n_job_dataloader)
# put net on device
net = net.to(self.device)
# Evaluating
if print_to_logger:
logger.info('Start Evaluating the DMSAD.')
start_time = time.time()
idx_label_score = []
net.eval()
with torch.no_grad():
for b, data in enumerate(loader):
# get data on device
input, label, mask, semi_label, idx = data
input = input.to(self.device).float()
label = label.to(self.device)
mask = mask.to(self.device)
semi_label = semi_label.to(self.device)
idx = idx.to(self.device)
# mask input
input = input * mask
# Embed input and compute anomaly score
_, embed = net(input)
# find closest sphere
dist, sphere_idx = torch.min(torch.norm(self.c.unsqueeze(0) -
embed.unsqueeze(1),
p=2,
dim=2),
dim=1)
# if self.R is not None:
# # anomaly scores positive if dist > R and negative if dist < R
# score = dist - torch.stack([self.R[j] for j in sphere_idx], dim=0)
# else:
# # else scores is just the minimal distance to a center
score = dist
# append idx, scores, label and embeding
idx_label_score += list(
zip(idx.cpu().data.numpy().tolist(),
label.cpu().data.numpy().tolist(),
score.cpu().data.numpy().tolist(),
sphere_idx.cpu().data.numpy().tolist(),
embed.cpu().data.numpy().tolist()))
if self.print_batch_progress:
print_progessbar(b,
len(loader),
Name='\t\t Evaluation Batch',
Size=40,
erase=True)
# compute AUCs
index, label, score, sphere_index, embed = zip(*idx_label_score)
label, score = np.array(label), np.array(score)
auc = roc_auc_score(label, score)
if save_tSNE:
embed = np.array(embed)
embed = TSNE(n_components=2).fit_transform(embed)
idx_label_score = list(
zip(index, label.tolist(), score.tolist(), sphere_index,
embed.tolist()))
self.eval_time = time.time() - start_time
self.eval_scores = idx_label_score
self.eval_auc = auc
if print_to_logger:
logger.info(f'Evaluation Time : {self.eval_time}')
logger.info(f'Evaluation AUC : {self.eval_auc:.3%}')
logger.info('Finished Evaluating the DMSAD.')
if return_auc:
return auc
vectors = []
artists = []
with open('song_vectors.json') as jsonfile:
result = json.load(jsonfile)
for artist, values in result.items():
if artist in [
"Eminem", "Nirvana", "Billy Talent", "Ska-P", "Daft Punk",
"Chick Corea", "Kings Of Leon"
]:
for value in values:
vector = value["latent"]
artists.append(artist)
vectors.append(vector)
print(np.array(vectors).shape)
X_embedded = TSNE(n_components=2).fit_transform(np.array(vectors))
for artist, p in zip(artists, X_embedded.tolist()):
plt.scatter(p[0], p[1], color=artist_map[artist], s=30)
ax = plt.gca()
ax.set_xticks([])
ax.set_yticks([])
ax.set(xlabel="t-SNE axis 1", ylabel="t-SNE axis 2")
ax.grid(True)
# plt.show()
plt.savefig("latent_vectors.pgf")
from sklearn.manifold import TSNE
import numpy as np
import json
with open('mv_data.json') as f:
j = json.loads(f.read())
def distance(a, b):
return np.linalg.norm(a.reshape((40, 40))-b.reshape((40, 40)))
data = np.array(list(map(lambda x: np.array(x).flatten(),
map(lambda x: x['viewMatrix'], j['papers']))))
embed = TSNE(metric=distance).fit_transform(data)
embed -= embed.min(axis=0)
embed /= embed.max(axis=0)
embed *= 2
embed -= 1
with open('tsne.json', 'w') as f:
f.write(json.dumps(embed.tolist()))
from sklearn.manifold import TSNE
import matplotlib.pyplot as plt
import numpy as np
import sys
relu = lambda x: max(0.0, x)
ans = []
with open('tsne.in') as f: # 需要重新打开文本进行读取
#with open('in.txt') as f: # 需要重新打开文本进行读取
for line2 in f:
tmp = line2.rstrip().split()
for i in range(len(tmp)):
tmp[i] = relu(float(tmp[i]))
#tmp = torch.Tensor(tmp)
ans.append(tmp)
#ans = ans[:2000]
x = np.array(ans)
print(x.tolist())
y = TSNE(n_components=2, perplexity=10, learning_rate=50,
n_iter=10000).fit_transform(x)
with open('draw_data.py', 'w') as f:
f.write('a=')
f.write('%s' % y.tolist())
class tSNE(Similarity):
_similarity_type = 'tsne'
def __init__(self, *args, **kwargs):
"""
This function might be called locally and in that case we want to return the
actual similarity calculator instance. Or it might be run rmeotely (via celery)
and in this case we want to reutrn the serialized version of the similarity instance.
Parameters
----------
display_type : string
String representation of the display, can be 'plot', 'hexbin'.
Returns
-------
N/A
"""
# Pull the display type out of kwargs if it is there. If not then we will
# use 'plot' as the default.
if 'display_type' in kwargs:
display_type = kwargs['display_type']
del kwargs['display_type']
else:
display_type = 'plot'
super().__init__(tSNE._similarity_type, *args, **kwargs)
log.info('Created {}'.format(self._similarity_type))
# Each line / element in these should correpsond
self._Y = None
self._fingerprints = []
self._filename_index = []
self._distance_measure = 'l2'
# Display types
self._display_type = display_type
self._display_types = ['plot', 'hexbin', 'mpl']
if self._display_type not in self._display_types:
raise Exception('Display type {} not one of {}'.format(
self._display_type, self._display_types))
# Define the distance measures.
self._distance_measures = {
'l2':
lambda Y, point: np.sqrt(np.sum((Y - np.array(point))**2, axis=1)),
'l1':
lambda Y, point: np.sum(np.abs((Y - np.array(point)), axis=1)),
}
@property
def data(self):
return self._Y
@property
def data_filtered(self):
return self._Y[self._fingerprint_filter_inds]
#
# Calculation Methods
#
def calculate(self, fingerprints):
"""
Calculate the TSNE based on the fingerprints.
Parameters
----------
fingerprints : list of Fingerprint instances
The fingerprints we want to calculate over.
Returns
-------
N/A
"""
log.info('Going to calculate tSNE from {} fingerprints'.format(
len(fingerprints)))
#
# Filter the fingerprints, if the filter is set.
#
if self._fingerprint_filter is not None:
fingerprints = self._fingerprint_filter(fingerprints)
#
# Calculate the unique labels
#
labels = []
values = {}
for ii, fp in enumerate(fingerprints):
log.debug(' fingerprint is {}'.format(fp))
#
# Add to unique label list
#
labels.extend(
[pred[1] for pred in fp.predictions if pred[1] not in labels])
#
# Store the predictions for next processing
#
values[ii] = fp.predictions
self._fingerprints.append(fp)
log.info('Unique labels {}'.format(labels))
#
# Set up the similarity matrix X based on the predictions
#
X = np.zeros((len(fingerprints), len(labels)))
for ii, fp in enumerate(fingerprints):
inds = [labels.index(prediction[1]) for prediction in values[ii]]
X[ii][inds] = [prediction[2] for prediction in values[ii]]
log.debug('X is {}'.format(X))
log.debug('Fingerprint list {}'.format(self._fingerprints))
#
# Compute the tSNE of the data.
#
log.info('Calculating the tSNE...')
self._Y = TSNE(n_components=2).fit_transform(X)
log.debug('self._Y is {}'.format(self._Y))
log.info('Done calculation')
#
# Utility Methods
#
def save(self):
"""
Save function converts the instance to a dict.
Parameters
----------
None
Returns
-------
dict
Dictionary representation of this instance.
"""
log.info('Returning the dictionary of information')
return {
'uuid': self._uuid,
'similarity_type': self._similarity_type,
'similarity': self._Y.tolist(),
'fingerprint': [fp.save() for fp in self._fingerprints],
'parameters': {
'distance_measure': self._distance_measure
}
}
def load(self, thedict, db=None):
"""
Reload the internal variables from the dictionary.
Parameters
----------
thedict : dict
The first parameter.
db : str
database object
Returns
-------
N/A
"""
log.info(
'Loading the dictionary of information with database {}'.format(
db))
self._uuid = thedict['uuid']
self._similarity_type = thedict['similarity_type']
self._Y = np.array(thedict['similarity'])
self._fingerprints = [
Fingerprint.factory(x) for x in thedict['fingerprint']
]
self._parameters = thedict['parameters']
self._distance_measure = self._parameters['distance_measure']
self._fingerprint_filter_inds = list(range(len(self._fingerprints)))
#
# Display methods
#
def set_display_type(self, display_type):
"""
Set the display type. Currently 'plot', 'hexbin', and 'mpl' are defined.
Parameters
----------
display_type : string
Display type: 'plot', 'hexbin', and 'mpl' are defined.
Returns
-------
N/A
"""
if display_type in self._display_types:
self._display_type = display_type
else:
raise ValueError('Display type {} not in {}'.format(
display_type, self._display_types))
def select_distance_measure(self, distance_measure=None):
"""
Select the distance measure.
Parameters
----------
distance_measure : string
Display type: 'plot', 'hexbin', and 'mpl' are defined.
Returns
-------
N/A
"""
if not distance_measure:
dm_options = self._distance_measures.keys()
selected = False
N = 0
while not selected:
# Show the fingerprints in order to allow for the person to select one
print('Select distance measure to use (q to quit:')
for ii, x in enumerate(dm_options):
print(' {}) {}'.format(ii, x))
N = ii
s = input('Select Number > ')
if s == 'q':
return
try:
s = int(s)
if s >= 0 and s < N:
self._distance_measure = self._distance_measures[s]
except Exception:
pass
else:
if distance_measure in self._distance_measures:
self._distance_measure = distance_measure
else:
self._distance_measure = self._distance_measures.keys()[0]
log.error(
'ERROR: No definition for {} so using {} instead.'.format(
distance_measure, self._distance_measure))
def display(self, tsne_axis):
"""
Display the plot into the matplotlib axis in the
parameter based on the plot type. This just determines
the plot type and then calls the internal plot function.
Parameters
----------
tsne_axis : Matplotlib.axes.axis
The matplotlib axis into which we want to display the plot.
Returns
-------
N/A
"""
if self._display_type == 'plot':
self._display_plot(tsne_axis)
elif self._display_type == 'hexbin':
return self._display_hexbin(tsne_axis)
# elif self._display_type == 'mpl':
# self._display_mpl(tsne_axis)
else:
raise ValueError('Plot type {} is not in the valid list {}'.format(
self._display_type, self._display_types))
def _display_plot(self, tsne_axis):
"""
Display the plot into the matplotlib axis as a regular scatter plot.
Parameters
----------
tsne_axis : Matplotlib.axes.axis
The matplotlib axis into which we want to display the plot.
Returns
-------
N/A
"""
tsne_axis.plot(self._Y[:, 0], self._Y[:, 1]) #, '.')
tsne_axis.grid('on')
tsne_axis.set_title('tSNE [{}]'.format(self._distance_measure))
def _display_hexbin(self, tsne_axis):
"""
Display the plot into the matplotlib axis as a hexbin.
Parameters
----------
tsne_axis : Matplotlib.axes.axis
The matplotlib axis into which we want to display the plot.
Returns
-------
N/A
"""
output = tsne_axis.hexbin(self._Y[:, 0], self._Y[:, 1], cmap='hot')
tsne_axis.grid('on')
tsne_axis.set_title('tSNE [{}]'.format(self._distance_measure))
# Set the color limits so that it is a little brighter
limmax = np.percentile(output.get_array(), 99.9)
output.set_clim((0, limmax))
return output
def find_similar(self, point, n=9, allow_overlapping_bounding_boxes=True):
"""
Find fingerprints that are close to the input point.
Parameters
----------
point : tuple (int, int)
A point in the plot.
n : int
Number to return.
allow_overlapping_bounding_boxes: bool
Whether to allow overlapping bb or not.
Returns
-------
list
List of dicts that describe the closest fingerprints.
"""
log.info('')
if self._fingerprint_filter_inds is None:
self._fingerprint_filter_inds = list(range(len(
self._fingerprints)))
distances = self._distance_measures[self._distance_measure](self._Y,
point)
log.debug('Filtering based, n distances {} n filter_inds {}'.format(
len(distances), len(self._fingerprint_filter_inds)))
inds = []
for ind in np.argsort(distances):
# First, make sure this index is one of the filtered ones.
if ind in self._fingerprint_filter_inds:
# Next check to see if we allow overlapping bounding boxes
# If not, make sure this one doesn't overlap with any in the list so far.
if (allow_overlapping_bounding_boxes or not any([
self._fingerprints[ind].cutout.bounding_box.overlap(
self._fingerprints[ii].cutout.bounding_box)
for ii in inds
])):
inds.append(ind)
if len(inds) == n:
break
# Now we want to look only in the "search_inds" if that is passed in
return [{
'tsne_point': self._Y[ind],
'distance': distances[ind],
'fingerprint': self._fingerprints[ind]
} for ind in inds[:n]]
def cutout_point(self, cutout):
"""
Given a cutout (and therefore a fingerprint), find the point in the
tSNE plot that it corresponds to.
Parameters
-----------
cutout : Cutout
The cutout we want to find.
Return
------
tSNE point: tuple
Point in the tSNE space the cutout corresponds to
"""
log.info('cutout {}'.format(cutout))
index = [
fingerprint.cutout.uuid for fingerprint in self._fingerprints
].index(cutout.uuid)
return self._Y[index]
def closest_cutout(self, data, point):
"""
Given a cutout (and therefore a fingerprint), find the point in the
tSNE plot that it corresponds to.
Parameters
-----------
cutout : Cutout
The cutout we want to find.
Return
------
tSNE point: tuple
Point in the tSNE space the cutout corresponds to
"""
log.info('data {} point {}'.format(data, point))
#
# Get the cutouts assocated with the data passed in.
#
cutouts = [
fingerprint.cutout for fingerprint in self._fingerprints
if fingerprint.cutout.data == data
]
#
# Compute distance between cutout bounding boxes centers and the point.
#
distances = [c.bounding_box.distance(point) for c in cutouts]
#
# Find the smallest.
#
index = np.argsort(distances)[0]
log.debug('Closest cutout is with bb {} and dist {}'.format(
cutouts[index].bounding_box, distances[index]))
return cutouts[index]
