def test_compute_pvalue():
assert isclose(1 / 101, compute_pvalue(0, np.arange(100)))
assert isclose(2 / 101, compute_pvalue(1, np.arange(100)))
assert isclose(101 / 101, compute_pvalue(101, np.arange(100)))
def perform_lesion_experiment_imagenet(
network,
num_clusters=10,
num_shuffles=10,
with_random=True,
downsampled=False,
eigen_solver='arpack',
batch_size=32,
data_dir='/project/clusterability_in_neural_networks/datasets/imagenet2012',
val_tar='ILSVRC2012_img_val.tar',
downsampled_n_samples=10000):
assert network != 'inceptionv3', 'This function does not yet support inceptionv3'
net, preprocess = Classifiers.get(
network) # get network object and preprocess fn
model = net((224, 224, 3),
weights='imagenet') # get network tf.keras.model
data_path = Path(data_dir)
tfrecords = list(data_path.glob('*validation.tfrecord*'))
if not tfrecords:
prep_imagenet_validation_data(data_dir, val_tar) # this'll take a sec
imagenet = tfds.image.Imagenet2012() # dataset builder object
imagenet._data_dir = data_dir
val_dataset_object = imagenet.as_dataset(
split='validation') # datast object
# assert isinstance(val_dataset_object, tf.data.Dataset)
if downsampled:
# get the ssmall dataset as an np.ndarray
dataset, y = imagenet_downsampled_dataset(
val_dataset_object, preprocess, n_images=downsampled_n_samples)
steps = None
val_set_size = downsampled_n_samples
else:
dataset = imagenet_generator(val_dataset_object, preprocess)
val_set_size = 50000
steps = val_set_size // 250 # use batch_size of 250
y = [] # to become an ndarray of true labels
for _ in range(steps):
_, logits = next(dataset)
y.append(np.argmax(logits, axis=-1))
y = np.concatenate(y)
batch_size = None
# get info from clustering
clustering_results = run_clustering_imagenet(network,
num_clusters=num_clusters,
with_shuffle=False,
eigen_solver=eigen_solver)
labels = clustering_results['labels']
connections = clustering_results[
'conv_connections'] # just connections for conv layers
layer_widths = [cc[0]['weights'].shape[0]
for cc in connections[1:]] # skip first conv layer
dense_sizes = get_dense_sizes(connections)
layer_widths.extend(list(dense_sizes.values()))
labels_in_layers = list(splitter(labels, layer_widths))
y_pred = np.argmax(model.predict(dataset,
steps=steps,
batch_size=batch_size),
axis=-1)
if not isinstance(dataset, np.ndarray):
dataset = imagenet_generator(val_dataset_object, preprocess)
evaluation = _get_classification_accs_imagenet(
y, y_pred) # an ndarray of all 1000 class accs
# next get true accs and label bincounts for the 1000 classes
accs_true, class_props_true, cluster_sizes = lesion_test_imagenet(
model,
dataset,
y,
labels_in_layers,
num_clusters,
steps,
batch_size,
val_dataset_object,
preprocess,
num_samples=1)
accs_true = accs_true[0] # it's a 1 element list, so just take the first
class_props_true = class_props_true[0] # same as line above
if not with_random:
# make and return a dict with a keys giving sub modules and values giving
# num shuffles, overall acc, and class accs
results = {}
for layer_key in accs_true.keys():
results[layer_key] = {}
for cluster_key in accs_true[layer_key].keys():
sm_results = {}
true_accs = accs_true[layer_key][cluster_key]
sm_results['num_shuffles'] = num_shuffles
sm_results['overall_acc'] = np.mean(true_accs)
sm_results['class_accs'] = true_accs
results[layer_key][cluster_key] = sm_results
return evaluation, results
else:
# perform random lesion tests num_shuffles times
# get random results
all_acc_random, all_class_props, _ = lesion_test_imagenet(
model,
dataset,
y,
labels_in_layers,
num_clusters,
steps,
batch_size,
val_dataset_object,
preprocess,
num_shuffles,
shuffle=True)
# make and return a dict with a keys giving sub modules and values giving
# stats about true labels, shufflings, and p values for hypothesis tests
results = {}
for layer_key in accs_true.keys():
results[layer_key] = {}
for cluster_key in accs_true[layer_key].keys():
sm_results = {}
true_accs = accs_true[layer_key][cluster_key]
random_accs = np.vstack([
all_acc_random[i][layer_key][cluster_key]
for i in range(num_shuffles)
])
overall_acc = np.mean(true_accs)
overall_random_accs = np.mean(random_accs, axis=1)
overall_acc_percentile = compute_pvalue(
overall_acc, overall_random_accs)
overall_acc_effect_factor = np.mean(
overall_random_accs) / overall_acc
random_changes = random_accs - evaluation
normalized_random_changes = (
random_changes.T / np.mean(random_changes, axis=-1)).T
random_range_normalized_changes = np.ptp(
normalized_random_changes, axis=-1)
true_changes = true_accs - evaluation
normalized_true_changes = true_changes / np.mean(true_changes)
true_range_normalized_changes = np.ptp(normalized_true_changes)
range_percentile = compute_pvalue(
true_range_normalized_changes,
random_range_normalized_changes,
side='right')
range_effect_factor = np.mean(random_range_normalized_changes
) / true_range_normalized_changes
sm_results['cluster_size'] = cluster_sizes[layer_key][
cluster_key]
sm_results['acc'] = overall_acc
sm_results['acc_percentile'] = overall_acc_percentile
sm_results[
'overall_acc_effect_factor'] = overall_acc_effect_factor
sm_results['range'] = true_range_normalized_changes
sm_results['range_percentile'] = range_percentile
sm_results['range_effect_factor'] = range_effect_factor
results[layer_key][cluster_key] = sm_results
return evaluation, results
def do_lesion_hypo_tests(evaluation, true_results, all_random_results):
n_submodules = len(true_results)
n_shuffles = len(all_random_results)
if 'mses' in true_results[0]: # if regression
n_inputs = 2
coefs = (0, 1)
exps = (0, 1, 2)
n_terms = len(exps)**n_inputs
n_outputs = len(coefs)**n_terms
poly_coefs = np.zeros((n_outputs, n_terms))
for poly_i, coef_list in enumerate(it.product(coefs, repeat=n_terms)):
poly_coefs[poly_i] = np.array(coef_list)
term_exps = [exs for exs in it.product(exps, repeat=n_inputs)]
n_terms = len(term_exps)
# random_mses has shape (n_random, n_submodules, n_outputs)
random_out_raw = np.array(
[[rand_sm['mses'] for rand_sm in rand_results]
for rand_results in all_random_results])
# true_mses has shape (n_submodules, n_outputs)
true_out_raw = np.array([true_sm['mses'] for true_sm in true_results])
# eval_out_raw has shape (n_outputs,)
eval_out_raw = evaluation['mses']
# random_outs has shape (n_random, n_submodules, n_terms)
random_outs = np.array([[[
np.mean(
np.array([
rand_sm[output_i] for output_i in range(n_outputs)
if poly_coefs[output_i][term_i] == 1
])) for term_i in range(n_terms)
] for rand_sm in rand_mses] for rand_mses in random_out_raw])
# true_outs has shape (n_submodules, n_terms)
true_outs = np.array([[
np.mean(
np.array([
true_sm[output_i] for output_i in range(n_outputs)
if poly_coefs[output_i][term_i] == 1
])) for term_i in range(n_terms)
] for true_sm in true_out_raw])
# eval_outs has shape (n_terms)
eval_outs = np.array([
np.mean(
np.array([
eval_out_raw[output_i] for output_i in range(n_outputs)
if poly_coefs[output_i][term_i] == 1
])) for term_i in range(n_terms)
])
else: # if classification
# random_outs has shape (n_random, n_submodules, n_outputs)
random_outs = np.array([[[
class_acc for key, class_acc in rand_sm.items()
if 'acc' in key and 'overall' not in key
] for rand_sm in rand_results] for rand_results in all_random_results])
# true_outs has shape (n_submodules, n_outputs)
true_outs = np.array([[
class_acc for key, class_acc in true_sm.items()
if 'acc' in key and 'overall' not in key
] for true_sm in true_results])
# eval_outs has shape (n_outputs,)
eval_outs = np.array([
class_acc for key, class_acc in evaluation.items()
if 'acc' in key and 'overall' not in key
])
random_means = np.mean(random_outs, axis=-1)
true_means = np.mean(true_outs, axis=-1)
random_changes = random_outs - eval_outs
random_normalized_changes = random_changes / np.mean(
random_changes, axis=-1)[:, :, np.newaxis]
random_ranges_normalized_changes = np.ptp(random_normalized_changes,
axis=-1)
true_changes = true_outs - eval_outs
true_normalized_changes = true_changes / np.mean(true_changes,
axis=-1)[:, np.newaxis]
true_ranges_normalized_changes = np.ptp(true_normalized_changes, axis=-1)
mean_percentiles = np.array([
compute_pvalue(true_means[sm_i], random_means[:, sm_i])
for sm_i in range(n_submodules)
])
range_percentiles = np.array([
compute_pvalue(true_ranges_normalized_changes[sm_i],
random_ranges_normalized_changes[:, sm_i],
side='right') for sm_i in range(n_submodules)
])
# get effect sizes
effect_factor_means = np.nanmean(
np.array([
np.mean(random_means[:, sm_i]) / true_means[sm_i]
for sm_i in range(n_submodules)
]))
effect_factor_ranges = np.nanmean(
np.array([
np.mean(random_ranges_normalized_changes[:, sm_i]) /
true_ranges_normalized_changes[sm_i]
for sm_i in range(n_submodules)
]))
chi2_p_means = chi2_categorical_test(mean_percentiles, n_shuffles)
chi2_p_ranges = chi2_categorical_test(range_percentiles, n_shuffles)
combined_p_means = combine_ps(mean_percentiles, n_shuffles)
combined_p_ranges = combine_ps(range_percentiles, n_shuffles)
results = {
'mean_percentiles': mean_percentiles,
'range_percentiles': range_percentiles,
'effect_factor_means': effect_factor_means,
'effect_factor_range': effect_factor_ranges,
'chi2_p_means': chi2_p_means,
'chi2_p_ranges': chi2_p_ranges,
'combined_p_means': combined_p_means,
'combined_p_ranges': combined_p_ranges
}
return results
def run_clustering(weights_path, num_clusters, eigen_solver, assign_labels,
epsilon, num_samples, delete_isolated_ccs_bool, network_type,
shuffle_smaller_model,
with_labels, with_shuffle, shuffle_method, n_workers,
is_testing, with_shuffled_ncuts):
# t0 = time.time()
# load weights and get adjacency matrix
if is_testing:
assert network_type == 'cnn'
loaded_weights = load_weights(weights_path)
if network_type == 'mlp':
weights_ = loaded_weights
adj_mat_ = weights_to_graph(loaded_weights)
elif network_type == 'cnn':
# comparing current and previous version of expanding CNN
if is_testing:
tester_cnn_tensors_to_flat_weights_and_graph(loaded_weights)
weights_, adj_mat_ = cnn_tensors_to_flat_weights_and_graph(loaded_weights)
else:
raise ValueError("network_type must be 'mlp' or 'cnn'")
# t1 = time.time()
# print('time to form adjacency matrix', t1 - t0)
# analyse connectivity structure of network
# cc_dict = connected_comp_analysis(weights_, adj_mat_)
# print("connectivity analysis:", cc_dict)
if delete_isolated_ccs_bool:
# delete unconnected components from the net
weights, adj_mat, node_mask = delete_isolated_ccs_refactored(weights_, adj_mat_,
is_testing=is_testing)
if is_testing:
weights_old, adj_mat_old = delete_isolated_ccs(weights_, adj_mat_)
assert (adj_mat != adj_mat_old).sum() == 0
assert all((w1 == w2).all() for w1, w2 in zip(weights, weights_old))
else:
weights, adj_mat = weights_, adj_mat_
node_mask = numpy.full(adj_mat.shape[0], True)
# t2 = time.time()
# print("time to delete isolated ccs", t2 - t1)
# find cluster quality of this pruned net
print("\nclustering unshuffled weights\n")
unshuffled_ncut, clustering_labels = weights_array_to_cluster_quality(weights, adj_mat,
num_clusters,
eigen_solver,
assign_labels, epsilon,
is_testing)
ave_in_out = (1 - unshuffled_ncut / num_clusters) / (2 * unshuffled_ncut
/ num_clusters)
# t3 = time.time()
# print("time to cluster unshuffled weights", t3 - t2)
result = {'ncut': unshuffled_ncut,
'ave_in_out': ave_in_out,
'node_mask': node_mask}
#return clustering_labels, adj_mat, result
if with_shuffle:
# find cluster quality of other ways of rearranging the net
print("\nclustering shuffled weights\n")
n_samples_per_worker = num_samples // n_workers
function_argument = (n_samples_per_worker, weights_path, #weights,
# loaded_weights,
network_type, num_clusters,
shuffle_smaller_model, eigen_solver, delete_isolated_ccs_bool,
assign_labels, epsilon, shuffle_method)
if n_workers == 1:
print('No Pool! Single Worker!')
shuff_ncuts = shuffle_and_cluster(*function_argument)
else:
print(f'Using Pool! Multiple Workers! {n_workers}')
workers_arguments = [[copy.deepcopy(arg) for _ in range(n_workers)]
for arg in function_argument]
with ProcessPool(nodes=n_workers) as p:
shuff_ncuts_results = p.map(shuffle_and_cluster,
*workers_arguments)
shuff_ncuts = np.concatenate(shuff_ncuts_results)
shuffled_n_samples = len(shuff_ncuts)
shuffled_mean = np.mean(shuff_ncuts, dtype=np.float64)
shuffled_stdev = np.std(shuff_ncuts, dtype=np.float64)
print('BEFORE', np.std(shuff_ncuts))
percentile = compute_pvalue(unshuffled_ncut, shuff_ncuts)
print('AFTER', np.std(shuff_ncuts))
z_score = (unshuffled_ncut - shuffled_mean) / shuffled_stdev
result.update({'shuffle_method': shuffle_method,
'n_samples': shuffled_n_samples,
'mean': shuffled_mean,
'stdev': shuffled_stdev,
'z_score': z_score,
'percentile': percentile})
if with_shuffled_ncuts:
result['shuffled_ncuts'] = shuff_ncuts
if with_labels:
result['labels'] = clustering_labels
return result
def compute_damaged_cluster_stats(true_results,
all_random_results,
metadata,
evaluation,
pvalue_threshod=None,
diff_threshold=-1 / 100,
double_joint_df=None,
single_df=None,
diff_field='diff'):
n_way = 2 if 'labels_in_layers' in true_results[0] else 1
index = ['labels_in_layers'] if n_way == 2 else ['layer', 'label']
assert diff_field in ('diff', 's_i|j')
if diff_field == 's_i|j':
assert n_way == 2
assert single_df is not None
if pvalue_threshod is None:
pvalue_threshod = 1 / len(all_random_results)
true_df = (pd.DataFrame(true_results).set_index(index).sort_index())
all_random_df = pd.DataFrame(sum(all_random_results, []))
all_random_layer_label = all_random_df.groupby(index)
true_df = true_df['acc_overall']
all_random_layer_label = all_random_layer_label['acc_overall']
corrected_pvalue_by_groups = (
(layer_label, compute_pvalue(true_df[layer_label], group))
for layer_label, group in all_random_layer_label)
layer_label_index, corrected_pvalue_by_layer_label = zip(
*corrected_pvalue_by_groups)
# make sure that the order of true_df and corrected_pvalue_by_layer_label is the same
# before setting corrected_pvalues_df's index as same as true_df
assert tuple(true_df.index) == layer_label_index
corrected_pvalues_df = pd.DataFrame(
{'acc_overall': corrected_pvalue_by_layer_label}, index=true_df.index)
corrected_pvalues_df = (corrected_pvalues_df.assign(
value='corrected_pvalue').set_index(['value'], append=True))
true_df = pd.DataFrame(true_df).assign(value='true').set_index(['value'],
append=True)
random_stats_df = pd.DataFrame(
{'acc_overall': all_random_layer_label.agg(['mean', 'std']).stack()})
z_score_df = ((true_df - random_stats_df.xs('mean', level=-1)) /
random_stats_df.xs('std', level=-1))
z_score_df.index = z_score_df.index.set_levels(['z_score'], level=-1)
diff_df = (true_df - evaluation['acc_overall'])
diff_df.index = diff_df.index.set_levels(['diff'], level=-1)
stats_df = (
pd.concat([
true_df,
corrected_pvalues_df,
# pvalues_df,
diff_df,
z_score_df,
random_stats_df
]).sort_index())
metadata_df = (pd.DataFrame(metadata).set_index(['layer', 'label']))
overall_stats_df = stats_df.unstack()
overall_stats_df.columns = overall_stats_df.columns.droplevel()
if n_way == 1:
overall_stats_df = pd.concat([overall_stats_df, metadata_df], axis=1)
if diff_field == 's_i|j':
overall_stats_df = enrich_score_double_conditional_df(
overall_stats_df, single_df)
overall_stats_df['taxonomy'] = overall_stats_df.apply(
lambda r: layer_cluster_taxonomify(r,
with_proportion=(n_way == 1),
pvalue_threshod=pvalue_threshod,
diff_threshold=diff_threshold,
diff_field=diff_field),
axis=1)
overall_columns = ['diff', 'corrected_pvalue']
if n_way == 1: overall_columns.append('label_in_layer_proportion')
overall_columns.append('true')
overall_columns.extend(['taxonomy', 'mean', 'std', 'z_score'])
if n_way == 1: overall_columns.append('n_layer_label')
overall_stats_df = overall_stats_df[overall_columns]
# adding the diagonal (i.e., single) to a conditional double using the joint double
if double_joint_df is not None:
assert n_way == 2, '`double_joint_df` should be given only for double'
warnings.warn(
'Make sure that `n_shuffled` for conditional double results should be the same'
' as the one for generating the joint double df!')
double_same_pair_mask = [
first == second for first, second in double_joint_df.index
]
double_same_pair_df = double_joint_df[double_same_pair_mask]
overall_stats_df = pd.concat([overall_stats_df,
double_same_pair_df]).sort_index()
return overall_stats_df
def clustering_comparisons(activations, act_labels, act_mask, corr_adj,
weight_labels, weight_mask, n_clusters, n_samples,
with_shuffle, epsilon):
# only consider units that were connected in the weight and activation graphs
weight_act_mask = weight_mask[act_mask]
act_weight_mask = act_mask[weight_mask]
activations = activations[weight_act_mask]
act_labels = act_labels[weight_act_mask]
weight_labels = weight_labels[act_weight_mask]
n_units = len(act_labels)
assert len(act_labels) == len(weight_labels)
assert n_units == np.sum(act_mask * weight_mask)
# get normalized mutual info between two clusterings
nmi = normalized_mutual_info_score(act_labels, weight_labels)
# get the ncut that results from using the activation adj mat with the weight-based clustering labels
mask_corr_adj = corr_adj[weight_act_mask, :][:, weight_act_mask]
transfer_ncut = compute_ncut(mask_corr_adj, weight_labels, epsilon)
# next, calculate the average intra and inter cluster corr_adj based on the weight labels
intra_adj = np.array([])
inter_adj = np.array([])
for label in range(n_clusters):
weight_label_mask = weight_labels == label
intra_adj = np.append(
intra_adj,
mask_corr_adj[weight_label_mask, :][:,
weight_label_mask].flatten())
inter_adj = np.append(
inter_adj,
mask_corr_adj[weight_label_mask, :][:, 1 -
weight_label_mask].flatten())
intra_mean = np.sum(intra_adj) / (len(intra_adj) - n_units
) # correct denom to ignore 0 self edges
inter_mean = np.mean(inter_adj)
# cca_grid = grid_cca(activations, weight_labels, n_clusters)
results = {
'normalized_mutual_information': nmi,
'transfer_ncut': transfer_ncut,
'intra_mean': intra_mean,
'inter_mean': inter_mean
} # , 'cca_grid': cca_grid}
if with_shuffle:
shuffled_nmis = []
for _ in range(n_samples):
np.random.shuffle(weight_labels)
shuffled_nmis.append(
normalized_mutual_info_score(act_labels, weight_labels))
shuffled_nmis = np.array(shuffled_nmis)
shuffled_mean = np.mean(shuffled_nmis)
shuffled_stdev = np.std(shuffled_nmis)
results.update({
'n_samples': n_samples,
'mean': shuffled_mean,
'stdev': shuffled_stdev,
'z_score': (nmi - shuffled_mean) / shuffled_stdev,
'percentile': compute_pvalue(nmi, shuffled_nmis)
})
return results
def do_clustering_activations(network_type, activations_path,
activations_mask_path, corr_type, n_clusters,
n_inputs, n_outputs, exclude_inputs,
eigen_solver, assign_labels, epsilon, n_samples,
with_shuffle, n_workers):
with open(activations_path, 'rb') as f:
activations = pickle.load(f)
with open(activations_mask_path, 'rb') as f:
activations_mask = pickle.load(f)
if network_type == 'cnn': # for the cnns, only look at conv layers
if 'stacked' in str(activations_path).lower():
n_in = n_inputs * 2
else:
n_in = n_inputs
cnn_params = CNN_VGG_MODEL_PARAMS if 'vgg' in str(
activations_path).lower() else CNN_MODEL_PARAMS
n_conv_filters = sum([cl['filters'] for cl in cnn_params['conv']])
n_start = np.sum(activations_mask[:n_in])
n_stop = n_start + np.sum(activations_mask[n_in:n_in + n_conv_filters])
activations = activations[n_start:n_stop, :]
activations_mask = activations_mask[n_in:n_in + n_conv_filters]
elif exclude_inputs:
n_in = n_inputs
n_start = np.sum(activations_mask[:n_in])
activations = activations[n_start:-n_outputs, :]
activations_mask = activations_mask[n_in:-n_outputs]
corr_adj = get_corr_adj(activations, corr_type)
unshuffled_ncut, clustering_labels = weights_array_to_cluster_quality(
None,
corr_adj,
n_clusters,
eigen_solver,
assign_labels,
epsilon,
is_testing=False)
ave_in_out = (1 - unshuffled_ncut / n_clusters) / (2 * unshuffled_ncut /
n_clusters)
ent = entropy(clustering_labels)
label_proportions = np.bincount(clustering_labels) / len(clustering_labels)
result = {
'activations': activations,
'corr_adj': corr_adj,
'mask': activations_mask,
'ncut': unshuffled_ncut,
'ave_in_out': ave_in_out,
'labels': clustering_labels,
'label_proportions': label_proportions,
'entropy': ent
}
if with_shuffle:
n_samples_per_worker = n_samples // n_workers
function_argument = (n_samples_per_worker, corr_adj, n_clusters,
eigen_solver, assign_labels, epsilon)
if n_workers == 1:
print('No Pool! Single Worker!')
shuff_ncuts = shuffle_and_cluster_activations(*function_argument)
else:
print(f'Using Pool! Multiple Workers! {n_workers}')
workers_arguments = [[
copy.deepcopy(arg) for _ in range(n_workers)
] for arg in function_argument]
with ProcessPool(nodes=n_workers) as p:
shuff_ncuts_results = p.map(shuffle_and_cluster_activations,
*workers_arguments)
shuff_ncuts = np.concatenate(shuff_ncuts_results)
shuffled_n_samples = len(shuff_ncuts)
shuffled_mean = np.mean(shuff_ncuts, dtype=np.float64)
shuffled_stdev = np.std(shuff_ncuts, dtype=np.float64)
print('BEFORE', np.std(shuff_ncuts))
percentile = compute_pvalue(unshuffled_ncut, shuff_ncuts)
print('AFTER', np.std(shuff_ncuts))
z_score = (unshuffled_ncut - shuffled_mean) / shuffled_stdev
result.update({
'n_samples': shuffled_n_samples,
'mean': shuffled_mean,
'stdev': shuffled_stdev,
'z_score': z_score,
'percentile': percentile
})
return result
def evaluate_imagenet_visualizations(
model_tag,
data_dir='/project/clusterability_in_neural_networks/datasets/'):
assert model_tag in VIS_NETS
with open(data_dir + model_tag + '_max_data.pkl', 'rb') as f:
data = pickle.load(f)
# unpack data
max_images = data['max_images']
# min_images = data['min_images']
random_max_images = data['random_max_images']
# random_min_images = data['random_min_images']
max_losses = data['max_losses']
# min_losses = data['min_losses']
random_max_losses = data['random_max_losses']
# random_min_losses = data['random_min_losses']
sm_sizes = data['sm_sizes']
sm_layers = data['sm_layers']
sm_layer_sizes = data['sm_layer_sizes']
sm_clusters = data['sm_clusters']
n_examples = len(sm_sizes)
n_random = int(len(random_max_images) / n_examples)
input_side = max_images.shape[1]
# get model
net, preprocess = Classifiers.get(
model_tag) # get network object and preprocess fn
model = net((input_side, input_side, 3),
weights='imagenet') # get network tf.keras.model
# get predictions
max_preds = model.predict(max_images)
# min_preds = model.predict(min_images)
random_max_preds = np.reshape(model.predict(random_max_images),
(n_examples, n_random, -1))
# random_min_preds = np.reshape(model.predict(random_min_images), (n_examples, n_random, -1))
# get entropies
max_entropies = np.array([entropy(pred) for pred in max_preds])
# min_entropies = np.array([entropy(pred) for pred in min_preds])
random_max_entropies = np.array([[entropy(pred) for pred in reps]
for reps in random_max_preds])
# random_min_entropies = np.array([[entropy(pred) for pred in reps] for reps in random_min_preds])
# reshape losses
random_max_losses = np.reshape(random_max_losses, (n_examples, n_random))
# random_min_losses = np.reshape(random_min_losses, (n_examples, n_random))
# get percentiles
max_percentiles_entropy = np.array([
compute_pvalue(max_entropies[i], random_max_entropies[i])
for i in range(len(max_entropies))
])
# min_percentiles_entropy = np.array([compute_pvalue(min_entropies[i], random_min_entropies[i])
# for i in range(len(min_entropies))])
max_percentiles_loss = np.array([
compute_pvalue(max_losses[i], random_max_losses[i], side='right')
for i in range(len(max_losses))
])
# min_percentiles_loss = np.array([compute_pvalue(min_losses[i], random_min_losses[i])
# for i in range(len(min_losses))])
# get effect sizes
effect_factor_entropy = np.mean(
np.array([
np.mean(random_max_entropies[i]) / max_entropies[i]
for i in range(len(max_entropies))
]))
effect_factor_loss = np.mean(
np.array([
np.mean(random_max_losses[i]) / max_losses[i]
for i in range(len(max_losses))
]))
# get pvalues
max_chi2_p_entropy = chi2_categorical_test(max_percentiles_entropy,
n_random)
max_combined_p_entropy = combine_ps(max_percentiles_entropy, n_random)
max_chi2_p_loss = chi2_categorical_test(max_percentiles_loss, n_random)
max_combined_p_loss = combine_ps(max_percentiles_loss, n_random)
results = {
'percentiles': (max_percentiles_entropy, max_percentiles_loss),
'effect_factors': (effect_factor_entropy, effect_factor_loss),
'chi2_ps': (max_chi2_p_entropy, max_chi2_p_loss),
'combined_ps': (max_combined_p_entropy, max_combined_p_loss),
'sm_layers': sm_layers,
'sm_sizes': sm_sizes,
'sm_layer_sizes': sm_layer_sizes,
'sm_clusters': sm_clusters
}
return results
def evaluate_visualizations(
model_tag,
rep,
is_unpruned,
data_dir='/project/clusterability_in_neural_networks/datasets/'):
if is_unpruned:
suff = f'{rep}_unpruned_max_data.pkl'
else:
suff = f'{rep}_pruned_max_data.pkl'
with open(data_dir + model_tag + suff, 'rb') as f:
data = pickle.load(f)
# unpack data
max_images = data['max_images']
random_max_images = data['random_max_images']
max_losses = data['max_losses']
random_max_losses = data['random_max_losses']
sm_sizes = data['sm_sizes']
sm_layers = data['sm_layers']
sm_layer_sizes = data['sm_layer_sizes']
sm_clusters = data['sm_clusters']
n_examples = len(sm_sizes)
n_max_min = int(len(max_images) / n_examples)
n_random = int(len(random_max_images) / n_examples)
input_side = max_images.shape[1]
# flatten all inputs if mlp
if 'mlp' in model_tag.lower():
max_images = np.reshape(max_images, [-1, IMAGE_SIZE**2])
random_max_images = np.reshape(random_max_images, [-1, IMAGE_SIZE**2])
# get model
model_dir = get_model_path(model_tag, filter_='all')[rep]
model_path = get_model_paths(model_dir)[is_unpruned]
model = load_model2(model_path)
# get predictions
max_preds = model.predict(max_images)
random_max_preds = np.reshape(model.predict(random_max_images),
(n_examples, n_random, -1))
# get entropies
max_entropies = np.array([entropy(pred) for pred in max_preds])
random_max_entropies = np.array([[entropy(pred) for pred in reps]
for reps in random_max_preds])
# reshape losses
random_max_losses = np.reshape(random_max_losses, (n_examples, n_random))
# get percentiles
max_percentiles_entropy = np.array([
compute_pvalue(max_entropies[i], random_max_entropies[i])
for i in range(len(max_entropies))
])
max_percentiles_loss = np.array([
compute_pvalue(max_losses[i], random_max_losses[i], side='right')
for i in range(len(max_losses))
])
# get effect sizes
effect_factors_entropies = np.array([
np.mean(random_max_entropies[i]) / max_entropies[i]
for i in range(len(max_entropies)) if max_entropies[i] > 0
])
mean_effect_factor_entropy = np.nanmean(effect_factors_entropies)
effect_factors_losses = np.array([
np.mean(random_max_losses[i]) / max_losses[i]
for i in range(len(max_losses)) if max_losses[i] > 0
])
mean_effect_factor_loss = np.nanmean(effect_factors_losses)
# get pvalues
max_chi2_p_entropy = chi2_categorical_test(max_percentiles_entropy,
n_random)
max_combined_p_entropy = combine_ps(max_percentiles_entropy, n_random)
max_chi2_p_loss = chi2_categorical_test(max_percentiles_loss, n_random)
max_combined_p_loss = combine_ps(max_percentiles_loss, n_random)
results = {
'percentiles': (
max_percentiles_entropy, # min_percentiles_entropy,
max_percentiles_loss), # min_percentiles_loss),
'effect_factors':
(mean_effect_factor_entropy, mean_effect_factor_loss),
'chi2_ps': (
max_chi2_p_entropy, # min_chi2_categorical_p_entropy,
max_chi2_p_loss), # min_chi2_categorical_p_loss),
'combined_ps': (max_combined_p_entropy, max_combined_p_loss),
'sm_layers':
sm_layers,
'sm_sizes':
sm_sizes,
'sm_layer_sizes':
sm_layer_sizes,
'sm_clusters':
sm_clusters
}
return results
