def predict_proba(self, X):
import tensorflow as tf
assert len(X.shape) == 2, "expected 2-dimensional input"
if self._zscore_feats:
scaled_X = self._scaler.transform(X)
else:
scaled_X = X
with self._graph.as_default():
preds = []
for batch in self._iterate_minibatches(
scaled_X, batchsize=self._eval_batch_size, shuffle=False):
feed_dict = {
self._input_placeholder: batch,
self._fc_keep_prob: 1.0
}
softmax = self._sess.run([tf.nn.softmax(self._predictions)],
feed_dict=feed_dict)
preds.append(np.squeeze(softmax))
proba = np.concatenate(preds, axis=0)
# we take only the 0th dimension because the 1st dimension is just the features
X_coords = {
coord: (dims, value)
for coord, dims, value in walk_coords(X)
if array_is_element(dims, X.dims[0])
}
proba = BehavioralAssembly(proba,
coords={
**X_coords,
**{
'choice':
list(self._label_mapping.values())
}
},
dims=[X.dims[0], 'choice'])
return proba
def _package_prediction(self, predicted_values, source):
coords = {
coord: (dims, values)
for coord, dims, values in walk_coords(source)
if not array_is_element(dims, self._neuroid_dim)
}
# re-package neuroid coords
dims = source.dims
# if there is only one neuroid coordinate, it would get discarded and the dimension would be used as coordinate.
# to avoid this, we can build the assembly first and then stack on the neuroid dimension.
neuroid_level_dim = None
if len(
self._target_neuroid_values
) == 1: # extract single key: https://stackoverflow.com/a/20145927/2225200
(neuroid_level_dim, _), = self._target_neuroid_values.items()
dims = [
dim if dim != self._neuroid_dim else neuroid_level_dim
for dim in dims
]
for target_coord, target_value in self._target_neuroid_values.items():
# this might overwrite values which is okay
coords[target_coord] = (neuroid_level_dim
or self._neuroid_dim), target_value
prediction = NeuroidAssembly(predicted_values,
coords=coords,
dims=dims)
if neuroid_level_dim:
prediction = prediction.stack(
**{self._neuroid_dim: [neuroid_level_dim]})
return prediction
def avg_repr(assembly):
presentation_coords = [
coord for coord, dims, values in walk_coords(assembly)
if array_is_element(dims, 'presentation') and coord != 'repetition'
]
assembly = assembly.multi_groupby(presentation_coords).mean(
dim='presentation', skipna=True)
return assembly
def average_repetition(self, assembly):
attrs = assembly.attrs # workaround to keeping attrs
presentation_coords = [coord for coord, dims, values in walk_coords(assembly)
if array_is_element(dims, 'presentation')]
presentation_coords = set(presentation_coords) - {'repetition_id', 'id'}
assembly = assembly.multi_groupby(presentation_coords).mean(dim='presentation', skipna=True)
assembly.attrs = attrs
return assembly
def average_trials(assembly):
non_repetition_coords = [
coord for coord, dim, values in walk_coords(assembly['presentation'])
if array_is_element(dim, 'presentation') and coord != 'repetition'
]
grouped = assembly.multi_groupby(non_repetition_coords)
if np.issubdtype(assembly.dtype, np.number):
return grouped.mean('presentation')
else: # for non-numbers take majority
return grouped.max('presentation')
def predict_proba(self, X):
assert len(X.shape) == 2, "expected 2-dimensional input"
scaled_X = self._scaler.transform(X)
proba = self._classifier.predict_proba(scaled_X)
# we take only the 0th dimension because the 1st dimension is just the features
X_coords = {coord: (dims, value) for coord, dims, value in walk_coords(X)
if array_is_element(dims, X.dims[0])}
proba = BehavioralAssembly(proba,
coords={**X_coords, **{'choice': list(self._label_mapping.values())}},
dims=[X.dims[0], 'choice'])
return proba
def fit(self, source, target):
source, target = self._align(source), self._align(target)
source, target = source.sortby(self._stimulus_coord), target.sortby(
self._stimulus_coord)
self._regression.fit(source, target)
self._target_neuroid_values = {}
for name, dims, values in walk_coords(target):
if self._neuroid_dim in dims:
assert array_is_element(dims, self._neuroid_dim)
self._target_neuroid_values[name] = values
def manual_merge(*elements, on='neuroid'):
dims = elements[0].dims
assert all(element.dims == dims for element in elements[1:])
merge_index = dims.index(on)
# the coordinates in the merge index should have the same keys
assert _coords_match(
elements, dim=on, match_values=False
), f"coords in {[element[on] for element in elements]} do not match"
# all other dimensions, their coordinates and values should already align
for dim in set(dims) - {on}:
assert _coords_match(
elements, dim=dim, match_values=True
), f"coords in {[element[dim] for element in elements]} do not match"
# merge values without meta
merged_values = np.concatenate([element.values for element in elements],
axis=merge_index)
# piece together with meta
result = type(
elements[0]
)(merged_values,
coords={
**{
coord: (dims, values)
for coord, dims, values in walk_coords(elements[0]) if not array_is_element(
dims, on)
},
**{
coord: (dims,
np.concatenate([
element[coord].values for element in elements
]))
for coord, dims, _ in walk_coords(elements[0]) if array_is_element(
dims, on)
}
},
dims=elements[0].dims)
return result
def _package_prediction(self, predicted_values, source):
coords = {
coord: (dims, values)
for coord, dims, values in walk_coords(source)
if not array_is_element(dims, self._neuroid_dim)
}
# re-package neuroid coords
dims = source.dims
for target_coord, target_value in self._target_neuroid_values.items():
# this might overwrite values which is okay
coords[target_coord] = self._neuroid_dim, target_value
prediction = NeuroidAssembly(predicted_values,
coords=coords,
dims=dims)
return prediction
def average_subregions(self, bold_shift, assembly):
attrs = assembly.attrs
del assembly['threshold']
# group by stimuli, fROI, subject after one another.
# this gets rid of adjacent coords unfortunately, but we accept that for now.
averaged_assembly = assembly.groupby('stimulus_id').apply(
lambda stimulus_group: stimulus_group.groupby('fROI_area').apply(
lambda fROI_group: fROI_group.groupby('subject_UID').mean()
))
averaged_assembly = averaged_assembly.stack(presentation=['stimulus_id'], neuroid=['fROI_area', 'subject_UID'])
# copy presentation coords back since those are needed for e.g. metric stratification
order = [averaged_assembly['stimulus_id'].values.tolist().index(stimulus_id)
for stimulus_id in assembly['stimulus_id'].values]
for copy_coord, dims, copy_value in walk_coords(assembly):
if not array_is_element(dims, 'presentation') or hasattr(averaged_assembly, copy_coord):
continue
averaged_assembly[copy_coord] = dims, copy_value[order]
averaged_assembly.attrs = attrs
averaged_assembly['neuroid_id'] = 'neuroid', [".".join([str(value) for value in values]) for values in zip(*[
averaged_assembly[coord].values for coord in ['subject_UID', 'fROI_area']])]
return averaged_assembly
def package(
features_path='/braintree/data2/active/users/qbilius/computed/hvm/ait'
):
assert os.path.isdir(features_path)
features_paths = [
os.path.join(features_path, 'basenets_hvm_feats_V4'),
os.path.join(features_path, 'basenets_hvm_feats_pIT'),
os.path.join(features_path, 'basenets_hvm_feats')
]
# alignment
meta = pd.read_pickle(
os.path.join(os.path.dirname(__file__), 'basenets-meta.pkl'))
meta = meta[meta['var'] == 6]
meta_ids = meta['id'].values.tolist()
hvm = brainscore.get_assembly('dicarlo.Majaj2015') \
.sel(variation=6) \
.multi_groupby(['category_name', 'object_name', 'image_id']) \
.mean(dim="presentation") \
.squeeze("time_bin")
hvm_ids = hvm['image_id'].values.tolist()
assert len(hvm_ids) == len(meta_ids)
indexes = [meta_ids.index(id) for id in hvm_ids]
basenets = []
for activations_path_v4 in glob.glob(
os.path.join(features_paths[0], '*.npy')):
activations_path_pit = os.path.abspath(
os.path.join(features_paths[1],
os.path.basename(activations_path_v4)))
activations_path_ait = os.path.abspath(
os.path.join(features_paths[2],
os.path.basename(activations_path_v4)))
assert os.path.isfile(activations_path_pit)
assert os.path.isfile(activations_path_ait)
print(activations_path_v4,
activations_path_pit,
activations_path_ait,
end='')
activations_v4 = np.load(activations_path_v4)
activations_pit = np.load(activations_path_pit)
activations_ait = np.load(activations_path_ait)
assert activations_v4.shape[0] == activations_pit.shape[
0] == activations_ait.shape[0] == len(indexes)
activations_v4 = activations_v4[indexes, :]
activations_pit = activations_ait[indexes, :]
activations_ait = activations_ait[indexes, :]
coords = {
coord: (dims, values)
for coord, dims, values in walk_coords(hvm)
if array_is_element(dims, 'presentation')
}
coords['neuroid_id'] = 'neuroid', list(range(3000))
coords['layer'] = 'neuroid', np.concatenate([
np.repeat('basenet-layer_v4', 1000),
np.repeat('basenet-layer_pit', 1000),
np.repeat('basenet-layer_ait', 1000)
])
activations = np.concatenate(
[activations_v4, activations_pit, activations_ait], axis=1)
print(activations.shape, end='')
assert activations.shape[0] == len(indexes)
assembly = NeuroidAssembly(activations,
coords=coords,
dims=['presentation', 'neuroid'])
model_name = os.path.splitext(
os.path.basename(activations_path_pit))[0]
basenets.append(model_name)
target_path = os.path.abspath(
os.path.join(
os.path.dirname(__file__), '..', '..', '..',
'output/candidate_models.models.model_activations',
'model={},stimulus_set=dicarlo.hvm,weights=imagenet,image_size=224,pca_components=1000.pkl'
.format(model_name)))
print("-->", target_path)
with open(target_path, 'wb') as target_file:
pickle.dump({'data': assembly}, target_file)
print(" ".join(basenets))
def add_neuroid_meta(self, target, source):
target = target.expand_dims(self.extrapolation_dimension)
for coord, dims, values in walk_coords(source):
if array_is_element(dims, self.extrapolation_dimension):
target[coord] = dims, values
return target
def _merge_voxel_meta(data, meta, bold_shift_seconds):
data_missing = set(meta['story'].values) - set(data['story'].values)
if data_missing:
warnings.warn(f"Stories missing from the data: {data_missing}")
meta_missing = set(data['story'].values) - set(meta['story'].values)
if meta_missing:
warnings.warn(f"Stories missing from the meta: {meta_missing}")
ignored_words = [None, '', '<s>', '</s>', '<s']
annotated_data = []
for story in tqdm(ordered_set(data['story'].values), desc='merge meta'):
if story not in meta['story'].values:
continue
story_meta = meta.sel(story=story)
story_meta = story_meta.sortby('time_end')
story_data = data.sel(story=story).stack(timepoint=['timepoint_value'])
story_data = story_data.sortby('timepoint_value')
timepoints = story_data['timepoint_value'].values.tolist()
assert is_sorted(timepoints)
timepoints = [
timepoint - bold_shift_seconds for timepoint in timepoints
]
sentences = []
last_timepoint = -np.inf
for timepoint in timepoints:
if last_timepoint >= max(story_meta['time_end'].values):
break
if timepoint <= 0:
sentences.append(None)
continue # ignore fixation period
timebin_meta = [
last_timepoint < end <= timepoint
for end in story_meta['time_end'].values
]
timebin_meta = story_meta[{'time_bin': timebin_meta}]
sentence = ' '.join(word.strip() for word in timebin_meta.values
if word not in ignored_words)
sentence = sentence.lower().strip()
# quick-fixes
if story == 'Boar' and sentence == 'interactions the the': # Boar duplicate
sentence = 'interactions the'
if story == 'KingOfBirds' and sentence == 'the fact that the larger': # missing word in TextGrid
sentence = 'earth ' + sentence
if story == 'MrSticky' and sentence == 'worry don\'t worry i went extra slowly since it\'s':
sentence = 'don\'t worry i went extra slowly since it\'s'
sentences.append(sentence)
last_timepoint = timebin_meta['time_end'].values[-1]
sentence_index = [
i for i, sentence in enumerate(sentences) if sentence
]
sentences = np.array(sentences)[sentence_index]
if story not in ['Boar', 'KingOfBirds',
'MrSticky']: # ignore quick-fixes
annotated_sentence = ' '.join(sentences)
meta_sentence = ' '.join(word.strip() for word in story_meta.values if word not in ignored_words) \
.lower().strip()
assert annotated_sentence == meta_sentence
# re-interpret timepoints as stimuli
coords = {}
for coord_name, dims, coord_value in walk_coords(story_data):
dims = [
dim if not dim.startswith('timepoint') else 'presentation'
for dim in dims
]
# discard the timepoints for which the stimulus did not change (empty word)
coord_value = coord_value if not array_is_element(
dims, 'presentation') else coord_value[sentence_index]
coords[coord_name] = dims, coord_value
coords = {
**coords,
**{
'stimulus_sentence': ('presentation', sentences)
}
}
story_data = story_data[{
dim: slice(None) if dim != 'timepoint' else sentence_index
for dim in story_data.dims
}]
dims = [
dim if not dim.startswith('timepoint') else 'presentation'
for dim in story_data.dims
]
story_data = xr.DataArray(story_data.values, coords=coords, dims=dims)
story_data['story'] = 'presentation', [story] * len(
story_data['presentation'])
gather_indexes(story_data)
annotated_data.append(story_data)
annotated_data = merge_data_arrays(annotated_data)
return annotated_data
