def compute_acc(y_true: torch.tensor, y_pred: torch.tensor) -> float:
y_t_np = y_true.clone().detach().numpy()
y_p_np = y_pred.clone().detach().numpy()
n = np.shape(y_t_np)[0]
count = 0
for i in range(0, n):
if np.argmax(y_p_np[i]) == np.argmax(y_t_np[i]):
count += 1
return count / n
def calculate_epe_statistics(
predictions: torch.tensor,
ground_truth: torch.tensor,
dim: int,
validitiy_flags=None,
) -> dict:
"""Calculates the eucledian diatnce statistics between the all coordinates. In case of 2.5 D
Args:
predictions (torch.tensor): Predicted coordinates of shape (#sample x 21 x 3)
ground_truth (torch.tensor): True coordinates of shape (#samples x 21 x3)
dim (int): to denote if the predictions and ground truth are 2.5D or 3D.
If 2 is passed .
Returns:
dict: Returns a dictionary containing following keys
'mean_epe', 'median_epe', 'min_epe', 'max_epe'
"""
device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
if dim == 2:
predictions_ = predictions[:, :, :2].clone()
ground_truth_ = ground_truth[:, :, :2].clone()
else:
if dim != 3:
print("Coordinates treated as 3D")
predictions_ = predictions.clone()
ground_truth_ = ground_truth.clone()
with torch.no_grad():
eucledian_dist = (torch.sum(
((predictions_.to(device) - ground_truth_.to(device))**2), 2)**0.5)
if validitiy_flags is not None:
mean_epe = torch.mean(eucledian_dist[validitiy_flags.view(-1, 21)])
median_epe = torch.median(eucledian_dist[validitiy_flags.view(
-1, 21)])
max_epe = torch.max(eucledian_dist[validitiy_flags.view(-1, 21)])
min_epe = torch.min(eucledian_dist[validitiy_flags.view(-1, 21)])
else:
mean_epe = torch.mean(eucledian_dist)
median_epe = torch.median(eucledian_dist)
max_epe = torch.max(eucledian_dist)
min_epe = torch.min(eucledian_dist)
return {
"eucledian_dist": eucledian_dist,
"mean": mean_epe,
"median": median_epe,
"min": min_epe,
"max": max_epe,
}
def generate_fix_step_permutation_for_finding_boundary(input_data: torch.
tensor,
variance=0.1,
steps=10):
all_permutations = []
for s in range(input_data.size()[0]):
for i in range(steps):
distance = (variance * (i + 1))
plus_data = input_data.clone()
plus_data[s] = plus_data[s] + distance
all_permutations.append(plus_data)
minus_data = input_data.clone()
minus_data[s] = minus_data[s] - distance
all_permutations.append(minus_data)
return all_permutations
def generate_permutation_for_numerical(
input_data: torch.tensor,
num_samples_per_feature,
variance=0.5,
):
'''
[input_data]: Normalised data. should be a 1-D tensor.
--------------------------
Return: all permutations.
'''
all_permutations = []
input_backup = input_data.clone()
max_range = torch.clip(input_data + variance, -1, 1)
min_range = torch.clip(input_data - variance, -1, 1)
for i in range(input_data.size(-1)):
input_to_permute = input_backup.clone()
input_to_permute = input_to_permute.unsqueeze(0).repeat(
num_samples_per_feature, 1)
input_to_permute[:, i] = torch.zeros(num_samples_per_feature).uniform_(
min_range[i], max_range[i])
all_permutations.extend(
list(torch.chunk(input_to_permute, num_samples_per_feature,
dim=0)))
########## append the original data ##########
all_permutations.append(input_backup.unsqueeze(0))
return all_permutations
def ista(self, x: torch.tensor, r: torch.tensor):
"""ISTA steps for sparsification
Args:
x ([torch.tensor]): Input for reconstruction
r ([torch.tensor]): Initialization of the code
Returns:
[torch.tensor]: the sparse code fitted to x
"""
r.requires_grad_(True)
converged = False
# update R
optim = torch.optim.SGD([{'params': r, "lr": self.lr_r}])
# train
while not converged:
old_r = r.clone().detach()
# prediction
x_hat = self.U(r)
# loss
loss = ((x - x_hat)**2).sum()
loss.backward()
# update R in place
optim.step()
# print(r.grad)
# zero grad
optim.zero_grad()
self.zero_grad()
# prox
r.data = self.soft_thresholding_(r, self.lmda)
# convergence
converged = torch.norm(r - old_r) / torch.norm(old_r) < 0.01
#print(torch.norm(r - old_r) / torch.norm(old_r))
return r
def forward(ctx, inputs: torch.tensor, threshold: float, sigmoid: bool):
"""
Args:
inputs (`torch.FloatTensor`)
The input matrix from which the binarizer computes the binary mask.
threshold (`float`)
The percentage of weights to keep (the rest is pruned).
`threshold` is a float between 0 and 1.
sigmoid (`bool`)
Whether to apply a sigmoid on the threshold
Returns:
mask (`torch.FloatTensor`)
Binary matrix of the same size as `inputs` acting as a mask (1 - the associated weight is
retained, 0 - the associated weight is pruned).
"""
# Get the subnetwork by sorting the inputs and using the top threshold
if sigmoid:
threshold = torch.sigmoid(threshold).item()
ctx.sigmoid = sigmoid
mask = inputs.clone()
_, idx = inputs.flatten().sort(descending=True)
j = math.ceil(threshold * inputs.numel())
# flat_out and mask access the same memory.
flat_out = mask.flatten()
flat_out[idx[j:]] = 0.
flat_out[idx[:j]] = 1.
ctx.save_for_backward(mask)
return mask
def forward(ctx, inputs: torch.tensor, threshold: float):
"""
Args:
inputs (`torch.FloatTensor`)
The input matrix from which the binarizer computes the binary mask.
threshold (`float`)
The percentage of weights to keep (the rest is pruned).
`threshold` is a float between 0 and 1.
Returns:
mask (`torch.FloatTensor`)
Binary matrix of the same size as `inputs` acting as a mask (1 - the associated weight is
retained, 0 - the associated weight is pruned).
"""
# Get the subnetwork by sorting the inputs and using the top threshold %
if not isinstance(threshold, float):
threshold = threshold[0]
mask = inputs.clone()
_, idx = inputs.flatten().sort(descending=True)
j = int(threshold * inputs.numel())
# flat_out and mask access the same memory.
flat_out = mask.flatten()
flat_out[idx[j:]] = 0
flat_out[idx[:j]] = 1
return mask
def heatmap_blend(img:torch.tensor, heatmap:torch.tensor, heatmap_blend_alpha=0.5, heatmap_clip_range=None, cmap='jet'):
"""
Blend the colormap onto original image
:param img: original image in RGB, dim (N, 3, H, W)
:param heatmap: input heatmap, dim (N, H, W) or (N, 1, H, W)
:param heatmap_blend_alpha: blend factor, 'heatmap_blend_alpha = 0' means the output is identical to original image
:param cmap: colormap to blend
:return: blended heatmap image, dim (N, 3, H, W)
"""
if heatmap.dim() == 4:
if heatmap.size(1) == 1:
heatmap = heatmap.view(heatmap.size(0), heatmap.size(2), heatmap.size(3))
else:
raise Exception("The heatmap should be (N, 1, H, W) or (N, H, W)")
N, C3, H, W = img.shape
assert heatmap_blend_alpha < 1.0
assert H == heatmap.size(1)
assert W == heatmap.size(2)
assert N == heatmap.size(0)
assert C3 == 3 # input image has three channel RGB
color_map = colormap(heatmap, cmap=cmap, clip_range=heatmap_clip_range, chw_order=True).to(img.device)
output_heat_map = img.clone()*(1.0 - heatmap_blend_alpha) + color_map * heatmap_blend_alpha
return output_heat_map
def __init__(self,
initial_centroids: torch.tensor,
lm_model,
tokenizer,
metric=lp_distance,
embedding_extractor=cls_embedding_extractor,
do_language_modeling=True,
device='cpu'):
super(ClusterLM, self).__init__()
self.initial_centroids = initial_centroids
self.add_module('lm_model', lm_model)
self.register_parameter(
'centroids',
nn.Parameter(initial_centroids.clone().float(),
requires_grad=True))
self.tokenizer = tokenizer
self.metric = metric
self.embedding_extractor = embedding_extractor
self.do_language_modeling = do_language_modeling
self.device = device
self.to(self.device)
def cxcywh_to_x1y1x2y2(cxcywh: torch.tensor) -> torch.tensor:
assert cxcywh.shape[-1] >= 4
x1y1x2y2 = cxcywh.clone()
x1y1x2y2[..., 0] = (cxcywh[..., 0] - cxcywh[..., 2] / 2)
x1y1x2y2[..., 1] = (cxcywh[..., 1] - cxcywh[..., 3] / 2)
x1y1x2y2[..., 2] = (cxcywh[..., 0] + cxcywh[..., 2] / 2)
x1y1x2y2[..., 3] = (cxcywh[..., 1] + cxcywh[..., 3] / 2)
return x1y1x2y2
def result(output: torch.tensor, labels: torch.tensor):
bats = output.shape[0]
adj_output = output.clone()
adj_output[torch.arange(bats), labels] -= 1
loss_mse = torch.mean(adj_output ** 2)
loss_noise = (np.pi*noise_strength*noise_strength)/2 * torch.sum(output ** 2)
return loss_mse + loss_noise
def get_mask(labels: torch.tensor) -> torch.tensor:
""" Returns mask from labels
Args:
labels: tensor containing labels
"""
labels = labels.clone()
zero_mask = labels[:, :, 0]
return zero_mask
def mask_tokens(
inputs: torch.tensor,
tokenizer: TextEncoderBase,
mlm_probability: float = 0.15,
ignore_index: int = -100,
):
""" Mask tokens function from Hugging Face that prepares masked tokens inputs/labels for
masked language modeling.
:param inputs: Input tensor to be masked.
:param tokenizer: COMET text encoder.
:param mlm_probability: Probability of masking a token (default: 15%).
:param ignore_index: Specifies a target value that is ignored and does not contribute to
the input gradient (default: -100).
Returns:
- Tuple with input to the model and the target.
"""
if tokenizer.mask_index is None:
raise ValueError(
"This tokenizer does not have a mask token which is necessary for masked language"
"modeling. Remove the --mlm flag if you want to use this tokenizer."
)
labels = inputs.clone()
probability_matrix = torch.full(labels.shape, mlm_probability)
special_tokens_mask = [
tokenizer.get_special_tokens_mask(val) for val in labels.tolist()
]
probability_matrix.masked_fill_(torch.tensor(special_tokens_mask,
dtype=torch.bool),
value=0.0)
padding_mask = labels.eq(tokenizer.padding_index)
probability_matrix.masked_fill_(padding_mask, value=0.0)
masked_indices = torch.bernoulli(probability_matrix).bool()
labels[
~masked_indices] = ignore_index # We only compute loss on masked tokens
# 80% of the time, we replace masked input tokens with ([MASK])
indices_replaced = (torch.bernoulli(torch.full(labels.shape, 0.8)).bool()
& masked_indices)
inputs[indices_replaced] = tokenizer.mask_index
# 10% of the time, we replace masked input tokens with random word
indices_random = (torch.bernoulli(torch.full(labels.shape, 0.5)).bool()
& masked_indices
& ~indices_replaced)
random_words = torch.randint(tokenizer.vocab_size,
labels.shape,
dtype=torch.long)
inputs[indices_random] = random_words[indices_random]
# The rest of the time (10% of the time) we keep the masked input tokens unchanged
return inputs, labels
def to_sparse_by_cdf(t: torch.tensor, lens, cdf: float):
_t = t.clone().detach()
_t = list(_t.split(lens, dim=0))
for i, this_t in enumerate(_t):
this_t_sorted, indices = torch.sort(this_t, descending=True)
mask = torch.cumsum(this_t_sorted, dim=-1) < cdf
mask[torch.sum(mask)] = True
_t[i][indices[mask]] = 1
_t[i][indices[~mask]] = 0
return torch.cat(_t, dim=0).long()
def cross_entropy(outputs: torch.tensor, labels: torch.tensor,
mask: torch.tensor) -> torch.tensor:
""" Returns cross entropy loss using masking
Args:
outputs: tensor with predictions
labels: tensor with labels
mask: tensor with masking
"""
labels = labels.clone()
labels[mask == 0] = -1
return nn.CrossEntropyLoss(ignore_index=-1)(outputs, labels.long())
def initialize_inducing(self,init_Z: torch.tensor) -> None:
"""Initializes inducing points using the argument init_Z. It prepares this inducing points
to be or not to be shared by all kernels.
"""
if self.Z_is_shared:
self.Z = nn.Parameter(init_Z.unsqueeze(dim = 0)) # this parameter is repeated when needed
else:
Z = torch.zeros(self.out_dim,self.M,self.inp_dim)
for l in range(self.out_dim):
aux_init = init_Z.clone()
Z[l,:] = aux_init
self.Z = nn.Parameter(Z)
def insert(self, observation: torch.tensor, hidden_state: torch.tensor,
reward: torch.tensor, action: torch.tensor, done: torch.tensor,
true_terminal: torch.tensor) -> None:
"""
Store single experience. Inserted in such a way so that the same
index across all the buffers should contain:
o_{t}, h_{t-1}, a_{t}, log_p_a_{t}, hat_V_{t}, r_{t+1},
done_{t}, true_terminal_{t}
Where the time index is determined by whether the variable was
generated before or after the env.step() step
:param observation: observation tensor, at {t+1}
:param hidden_state: hidden state tensor, at {t}
:param reward: reward tensor, at {t+1}
:param action: action tensor, at {t}
:param done: done tensor, at {t+1}
:param true_terminal: true termination state tensor, at {t+1}
:param pred_value: predicted value tensor, at {t}
:param action_log_prob: action log probability tensor, at {t}
:return: None
"""
# ==
# Save copy of experiences
self.obs_buffer[self.step + 1] = observation.clone().detach()
self.hid_buffer[self.step + 1] = hidden_state.clone().detach()
self.don_buffer[self.step + 1] = done.clone().detach()
self.true_termin[self.step + 1] = true_terminal.clone().detach()
self.rew_buffer[self.step] = reward.clone().detach()
self.act_buffer[self.step] = action.clone().detach()
self.step += 1 # potential TODO confirm correctness
def __init__(self, data: torch.tensor, intervals_te_rew, column_to_time_features, window_size,
device=None, scaler=PaperScaler()):
if device is None:
device = torch.device("cuda:0" if torch.cuda.is_available() else "cpu")
self.scaler = scaler
self.device = device
self.data = data.clone().detach().to(self.device)
self.pred_counter = window_size
self.trace_index = None
self.intervals = intervals_te_rew
self.column_feature = column_to_time_features
self.win = window_size
self.given_state = None
def xywh_to_xyXY(boxes_xywh: torch.tensor) -> torch.tensor:
'''
Get bounding box coordinates in [ x_top_left, y_top_left, x_bottom_right, y_bottom_right] format.
Parameters
----------
boxes : Bounding Box, a tensor in [ x_top_left, y_top_left, bb_width, bb_height] format.
'''
boxes_xyXY = boxes_xywh.clone()
boxes_xyXY[:, 2] = boxes_xyXY[:, 2] + boxes_xyXY[:, 0]
boxes_xyXY[:, 3] = boxes_xyXY[:, 3] + boxes_xyXY[:, 1]
return boxes_xyXY
def transform(self, x: torch.tensor, inplace=True):
if not inplace:
out = x.clone()
else:
out = x
if len(x.shape) == 3:
for _cf in self.column_features:
out[:, :, self.column_features[_cf]] = out[:, :, self.column_features[_cf]] / self.scales[_cf]
if type(out) == pd.DataFrame:
for _cf in self.column_features:
out[_cf] = out[_cf] / self.scales[_cf]
return out
def get_corrupted_batch_unfiltered(self, batch: torch.tensor,
device: torch.device):
corrupted_batch = batch.clone().to()
head_tail_indexes = torch.randint(2, (batch.shape[0], )).to(device) * 2
corrupted_batch[torch.arange(corrupted_batch.shape[0]),
head_tail_indexes] = torch.randint(
self.num_of_entities,
(corrupted_batch.shape[0], )).to(device)
# torch.randint statement randomly generates 0 or 1. The outcome is multiplied with 2 to get 0 or 2
# which is the column index for either the head_id or tail_id. Hence, we create a tensor defining
# whether we corrupt the head or tail for the corrupted batch and transmit it as an input
## print batch and corr batch in forward() to dismiss the possibility that they are refering to the same tensor instance
return corrupted_batch
def __init__(self, dist: torch.tensor, num_utterances: int, spub: list):
"""Trade Comm public belief state
Args:
dist [num_items, num_items]: Joint probability distribution over
player items
num_utterances: Number of utterances in game
spub: Public state (list of public observations)
Attributes:
See args
"""
assert_joint_probability(dist, dist.shape)
self.dist = dist.clone()
self.num_utterances = num_utterances
self.spub = list(spub)
def log_non_linear(self, f: torch.tensor, Y: torch.tensor, noise_var: torch.tensor, flow: list, X: torch.tensor, **kwargs):
""" Return the log likelihood of S Gaussian distributions, each of this S correspond to a quadrature point.
The only samples f have to be warped with the composite flow G().
-> f is assumed to be stacked samples of the same dimension of Y. Here we compute (apply lotus rule):
\int \log p(y|fK) q(fK) dfK = \int \log p(y|fk) q(f0) df0 \approx 1/sqrt(pi) sum_i w_i { \log[ p( y | G( sqrt(2)\sigma f_i + mu), sigma^2 ) ] };
where q(f0) is the initial distribution. We just face the problem of computing the expectation under a log Gaussian of a
non-linear transformation of the mean, given by the flow.
Args:
`f` (torch.tensor) :->: Minibatched - latent function samples in (S,Dy,MB), being S the number of quadrature points and MB the minibatch.
This is directly given by the gpytorch.GaussHermiteQuadrature1D method in this format and corresponds to
\sqrt(2)\sigma f_i + mu see https://en.wikipedia.org/wiki/Gauss%E2%80%93Hermite_quadrature
`Y` (torch.tensor) :->: Minibatched Observations in Dy x MB.
`noise_var` (torch.tensor) :->: Observation noise
'flow' (CompositeFlow) :->: Sequence of flows to be applied to each of the outputs
'X' (torch.tensor) :->: Input locations used for input dependent flows. Has shape [Dy,S*MB,Dx] or shape [S*MB,Dx]. N
"""
assert len(flow) == self.out_dim, "This likelihood only supports a flow per output_dim. Got {} for Dy {}".format(self.out_dim,len(flow))
assert len(X.shape) == 3, 'Bad input X, expected (out_dim,MB*S,Dx)'
assert X.size(0) == self.out_dim, 'Wrong first dimension in X, expected out_dim'
S = self.quad_points
MB = Y.size(1)
Dy = self.out_dim
Y = Y.view(Dy,MB,1).repeat((S,1,1,1)) # S,Dy,MB,1
noise_var = noise_var.view(Dy,MB,1).repeat((S,1,1,1)) # S,Dy,MB,1
fK = f.clone()
# Be aware that as we expand X we will be performing self.quad_points forwards through the NNets for each output. This might be inneficient unless pytorch only performs the operation once and returned the expanded dimension
# expanded_size = [self.quad_points] + [-1]*(len(X.size()))
# X = X.expand(expanded_size) # no need for this broadcasting as pytorch will broadcast automatically
for idx,fl in enumerate(flow):
# warp the samples
fK[:,idx,:] = fl(f[:,idx,:],X[idx])
fK = fK.view(S,Dy,MB,1) # we add extra dimension so that batched_log_gaussian does not reduce minibatch dimension. This will be reduced at the end as the
# GaussHermiteQudrature from gpytorch reduces S by default. Although sum is associative we prefer to separate for clarity.
log_p_y = batched_log_Gaussian( obs = Y, mean = fK, cov = noise_var, diagonal = True, cov_is_inverse = False) # (S,Dy,MB)
return log_p_y # return (S,Dy,MB) so that reduction is done for S.
def compute_loss(args: argparse.Namespace,
model: DDP,
images: torch.tensor,
targets: torch.tensor,
num_classes: int) -> torch.tensor:
"""
inputs:
images : shape [batch_size, C, h, w]
logits : shape [batch_size, num_classes, h, w]
targets : shape [batch_size, h, w]
returns:
loss: shape []
logits: shape [batch_size]
"""
batch, h, w = targets.size()
one_hot_mask = torch.zeros(batch, num_classes, h, w).to(dist.get_rank())
new_target = targets.clone().unsqueeze(1)
new_target[new_target == 255] = 0
one_hot_mask.scatter_(1, new_target, 1).long()
if args.smoothing:
eps = 0.1
one_hot = one_hot_mask * (1 - eps) + (1 - one_hot_mask) * eps / (num_classes - 1)
else:
one_hot = one_hot_mask # [batch_size, num_classes, h, w]
if args.mixup:
alpha = 0.2
lam = np.random.beta(alpha, alpha)
rand_index = torch.randperm(images.size()[0]).to(dist.get_rank())
one_hot_a = one_hot
targets_a = targets
one_hot_b = one_hot[rand_index]
target_b = targets[rand_index]
mixed_images = lam * images + (1 - lam) * images[rand_index]
logits = model(mixed_images)
loss = cross_entropy(logits, one_hot_a, targets_a) * lam \
+ cross_entropy(logits, one_hot_b, target_b) * (1. - lam)
else:
logits = model(images)
loss = cross_entropy(logits, one_hot, targets)
return loss
def score_subjects(self, p: torch.tensor, o: torch.tensor) -> torch.tensor:
"""
Compute subject scores for all entities, given p and o.
:param p: torch.tensor, scalar
The predicate.
:param o: torch.tensor, scalar
The object.
:return: torch.tensor, shape: (num_entities,)
The scores for all entities.
"""
new_p = p.clone()
if self.inverse_model:
new_p += self.num_relations // 2
return self.predict_for_ranking(o, new_p)
def meansqerr(output: torch.tensor, labels: torch.tensor):
"""This criterion evaluates a one-hot vector on mean-squared error when
the labels are the indices of the output that should be 1. This is a drop-in
replacement for cross-entropy loss whereas the default MSEError requires changing
your encoding.
Args:
output (torch.tensor): the output
labels (torch.tensor): the expected labels
Returns:
loss (torch.tensor): the loss of the network
"""
bats = output.shape[0]
adj_output = output.clone()
adj_output[torch.arange(bats), labels] -= 1
return torch.mean(adj_output ** 2)
def argmax(module: nn.Module, arg: torch.tensor):
print('Computing argmax')
arg.requires_grad = True
opt = torch.optim.Adam([arg], lr=0.1)
for idx in range(1000):
out = module(arg)
loss = -out
prev_arg = arg.clone()
loss.backward()
opt.step()
opt.zero_grad()
module.zero_grad()
d = (arg - prev_arg).norm(2)
if d < 1e-4:
print('breaking')
break
#print(f'Final d: {d}')
return arg, out
def __init__(self,
initial_centroids: torch.tensor,
metric=lp_distance,
device='cpu'):
super(DifferentiableKMeans, self).__init__()
self.initial_centroids = initial_centroids
self.register_parameter(
'centroids',
nn.Parameter(initial_centroids.clone().float(),
requires_grad=True))
self.metric = metric
self.device = device
self.to(self.device)
def cummax(
tensor: torch.tensor, dim: int = 0) -> torch.tensor:
"""Return the cumulative maximum of the elements along a given axis.
Args:
tensor (torch.tensor): input tensor
dim (int, optional): Defaults to 0.
Axis along which the cumulative maximum is computed
Returns:
max_tensor (torch.tensor):
A tensor with the same size as the input holding the cumulative
maximum of the input tensor.
"""
ret_val = tensor.clone()
ret_val_unbind = ret_val.unbind(dim)
if len(ret_val_unbind):
for current, last in zip(ret_val_unbind[1:], ret_val_unbind):
current[()] = torch.max(current, last)
return ret_val
def remap_heading(data: torch.tensor, heading_map: Dict = None) -> torch.tensor:
""" Remaps the values in data according to the map.
Args:
data: Data to remap.
heading_map: Value map. Default remaping values:
{0:0, 1:1, 85:2, 170:3, 255:4}
Returns:
Tensor with remaped values.
"""
if heading_map is None:
heading_map = {0: 0, 1: 1, 85: 2, 170: 3, 255: 4}
remaped = data.clone().detach()
for key, val in heading_map.items():
remaped[remaped == key] = val
return remaped
