def mutipleLearningMethod(inputVec, length1, length2, alpha, beta):
threshold = 0.01
iteration = 0
# initialize A and X
# print(inputVec)
initDic = DictionaryLearning(n_components=length1, alpha=alpha)
A = initDic.fit(inputVec).components_
X = initDic.fit_transform(inputVec)
# while error < threshold:
while iteration < 20:
# given A, X, update for B and Y
dic = DictionaryLearning(n_components=length2, alpha=beta)
B = dic.fit(inputVec - X.dot(A)).components_
Y = dic.fit_transform(inputVec - X.dot(A))
# given B, Y, update A, X
dic2 = DictionaryLearning(n_components=length1, alpha=alpha)
A = dic2.fit(inputVec - Y.dot(B)).components_
X = dic2.fit_transform(inputVec - Y.dot(B))
error = norm(inputVec-X.dot(A)-Y.dot(B)) + alpha*norm(X, 1) + beta*norm(Y, 1)
iteration += 1
return A, X, B, Y
def _get_stain_matrix(self, input_image: np.ndarray) -> np.ndarray:
"""Compute the 2x3 stain matrix with the method from the paper
Args:
input_image (np.array): Image to extract the stains from
Returns:
np.array: Extracted stains
"""
mask = self._notwhite_mask(input_image, threshold=self.thres).reshape(
(-1, ))
optical_density = self._rgb_to_od(input_image).reshape((-1, 3))
optical_density = optical_density[mask]
n_features = optical_density.T.shape[1]
dict_learner = DictionaryLearning(
n_components=2,
alpha=self.lambda_s,
max_iter=10,
fit_algorithm="lars",
transform_algorithm="lasso_lars",
transform_n_nonzero_coefs=n_features,
random_state=0,
positive_dict=True,
)
dictionary = dict_learner.fit_transform(optical_density.T).T
if dictionary[0, 0] < dictionary[1, 0]:
dictionary = dictionary[[1, 0], :]
dictionary = self._normalize_rows(dictionary)
return dictionary
def dictionaryLearningMethod(inputVec, length):
# length = len(vectors)
length = length
dic = DictionaryLearning(n_components=length, alpha=0.05)
dictionary = dic.fit(inputVec).components_
sparseCoder = dic.fit_transform(inputVec)
# sparseCoder = dic.fit(vectors).components_
# dictionary = dic.fit_transform(vectors)
return dictionary, sparseCoder
def dictionaryLearningMethod(vectors):
# length = len(vectors)
length = 5
dic = DictionaryLearning(n_components=length, alpha=1)
dictionary = dic.fit(vectors).components_
sparseCoder = dic.fit_transform(vectors)
# sparseCoder = dic.fit(vectors).components_
# dictionary = dic.fit_transform(vectors)
return dictionary.T , sparseCoder.T
def _estimate_linear_combination(self, imgs_vec, params):
estimator = DictionaryLearning(n_components=params.get('nb_labels'),
max_iter=params.get('max_iter'),
fit_algorithm='lars',
transform_algorithm='omp',
split_sign=False,
tol=params.get('tol'),
n_jobs=1)
fit_result = estimator.fit_transform(imgs_vec)
components = estimator.components_
return estimator, components, fit_result
def init_atlas_dict_learn(imgs, nb_patterns, nb_iter=5, bg_threshold=0.1):
""" estimating initial atlas using SoA method based on linear combinations
:param list(ndarray) imgs: list of input images
:param int nb_patterns: number of pattern in the atlas to be set
:param int nb_iter: max number of iterations
:param float bg_threshold:
:return ndarray: estimated atlas
>>> np.random.seed(0)
>>> atlas = np.zeros((8, 12), dtype=int)
>>> atlas[:3, 1:5] = 1
>>> atlas[3:7, 6:12] = 2
>>> luts = np.array([[0, 1, 0]] * 99 + [[0, 0, 1]] * 99 + [[0, 1, 1]] * 99)
>>> imgs = [lut[atlas] for lut in luts]
>>> init_atlas_dict_learn(imgs, 2)
array([[0, 2, 2, 2, 2, 0, 0, 0, 0, 0, 0, 0],
[0, 2, 2, 2, 2, 0, 0, 0, 0, 0, 0, 0],
[0, 2, 2, 2, 2, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1],
[0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1],
[0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1],
[0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1],
[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]])
"""
imgs_vec = np.array([np.ravel(im) for im in imgs])
try:
estimator = DictionaryLearning(n_components=nb_patterns + 1,
fit_algorithm='lars',
transform_algorithm='omp',
split_sign=False,
max_iter=nb_iter)
fit_result = estimator.fit_transform(imgs_vec)
components = estimator.components_
ptn_used = np.sum(np.abs(fit_result), axis=0) > 0
atlas_ptns = components.reshape((-1, ) + imgs[0].shape)
atlas = convert_lin_comb_patterns_2_atlas(atlas_ptns, ptn_used,
bg_threshold)
except Exception:
logging.exception('CRASH: %s', init_atlas_dict_learn.__name__)
atlas = np.zeros(imgs[0].shape, dtype=int)
return atlas
def cluster_sk_dictionary_learning(content):
""" SK DL | | components: N, data:[[]], alpha: N, tol: N, fit: String, transform: String, split: bool """
_config = DictionaryLearning(
n_components=content['n_components'],
alpha=content['alpha'],
max_iter=content['max_iter'],
tol=content['tol'],
fit_algorithm=content['fit_algorithm'],
transform_algorithm=content['transform_algorithm'],
split_sign=content['split_sign'],
n_jobs=-1)
_result = _config.fit_transform(content['data'])
return httpWrapper(json.dumps({
'result': _result.tolist(),
'components': _config.components_.tolist(),
'error': _config.error_,
'nIter': _config.n_iter_
}, ignore_nan=True ))
def get_stain_matrix(img, luminosity_threshold=0.8, regulariser=0.1):
"""Stain matrix estimation.
Args:
img (:class:`numpy.ndarray`): input image used for stain matrix estimation
luminosity_threshold (float): threshold used for tissue area selection
regulariser (float): regulariser used in dictionary learning
Returns:
:class:`numpy.ndarray`: estimated stain matrix.
"""
img = img.astype("uint8") # ensure input image is uint8
# convert to OD and ignore background
tissue_mask = get_luminosity_tissue_mask(
img, threshold=luminosity_threshold).reshape((-1, ))
img_od = convert_RGB2OD(img).reshape((-1, 3))
img_od = img_od[tissue_mask]
# do the dictionary learning
dl = DictionaryLearning(
n_components=2,
alpha=regulariser,
transform_alpha=regulariser,
fit_algorithm="lars",
transform_algorithm="lasso_lars",
positive_dict=True,
verbose=False,
max_iter=3,
transform_max_iter=1000,
)
dictionary = dl.fit_transform(X=img_od.T).T
# order H and E.
# H on first row.
dictionary = dl_output_for_h_and_e(dictionary)
normalised_rows = dictionary / np.linalg.norm(dictionary, axis=1)[:,
None]
return normalised_rows
def get_stain_matrix(self, img):
"""Stain matrix estimation.
Args:
img (:class:`numpy.ndarray`):
Input image used for stain matrix estimation
Returns:
:class:`numpy.ndarray`:
Estimated stain matrix.
"""
img = img.astype("uint8") # ensure input image is uint8
luminosity_threshold = self.__luminosity_threshold
regularizer = self.__regularizer
# convert to OD and ignore background
tissue_mask = get_luminosity_tissue_mask(
img, threshold=luminosity_threshold).reshape((-1, ))
img_od = rgb2od(img).reshape((-1, 3))
img_od = img_od[tissue_mask]
# do the dictionary learning
dl = DictionaryLearning(
n_components=2,
alpha=regularizer,
transform_alpha=regularizer,
fit_algorithm="lars",
transform_algorithm="lasso_lars",
positive_dict=True,
verbose=False,
max_iter=3,
transform_max_iter=1000,
)
dictionary = dl.fit_transform(X=img_od.T).T
# order H and E.
# H on first row.
dictionary = dl_output_for_h_and_e(dictionary)
return dictionary / (np.linalg.norm(dictionary, axis=1)[:, None] +
sys.float_info.epsilon)
S /= S.std(axis=0) # Standardize data
# Mix data
A = np.array([[1, 1, 1], [0.5, 2, 1.0], [1.5, 1.0, 2.0]]) # Mixing matrix
X = np.dot(S, A.T) # Generate observations
# Compute ICA
ica = FastICA(n_components=3)
S_ = ica.fit_transform(X) # Reconstruct signals
A_ = ica.mixing_ # Get estimated mixing matrix
# For comparison, compute PCA
pca = PCA(n_components=3)
H = pca.fit_transform(X) # Reconstruct signals based on orthogonal components
print("PCA:", np.sum(H[:, 0]*H[:, 1]))
# Compute DL
dl = DictionaryLearning(n_components=3)
D = dl.fit_transform(X) # Reconstruct signals based on orthogonal components
# #############################################################################
# Plot results
print("Ploting...")
plt.figure()
models = [X, S, S_, H, D]
names = ['Observations (mixed signal)',
'True Sources',
'ICA recovered signals',
'PCA recovered signals',
'DL recovered signals']
colors = ['red', 'steelblue', 'orange', 'blue']
plt.figure(1)
class SC(object):
"""
Wrapper for sklearn package. Performs sparse coding
Sparse Coding, or Dictionary Learning has 5 methods:
- fit(waveforms)
update class instance with Sparse Coding fit
- fit_transform()
do what fit() does, but additionally return the projection onto new basis space
- inverse_transform(A)
inverses the decomposition, returns waveforms for an input A, using Z^\dagger
- get_basis()
returns the basis vectors Z^\dagger
- get_params()
returns metadata used for fits.
"""
def __init__(self, num_components=10,
catalog_name='unknown',
alpha = 0.001,
transform_alpha = 0.01,
max_iter = 2000,
tol = 1e-9,
n_jobs = 1,
verbose = True,
random_state = None):
self._decomposition = 'Sparse Coding'
self._num_components = num_components
self._catalog_name = catalog_name
self._alpha = alpha
self._transform_alpha = 0.001
self._n_jobs = n_jobs
self._random_state = random_state
self._DL = DictionaryLearning(n_components=self._num_components,
alpha = self._alpha,
transform_alpha = self._transform_alpha,
n_jobs = self._n_jobs,
verbose = verbose,
random_state = self._random_state)
def fit(self,waveforms):
# TODO make sure there are more columns than rows (transpose if not)
# normalize waveforms
self._waveforms = waveforms
self._DL.fit(self._waveforms)
def fit_transform(self,waveforms):
# TODO make sure there are more columns than rows (transpose if not)
# normalize waveforms
self._waveforms = waveforms
self._A = self._DL.fit_transform(self._waveforms)
return self._A
def inverse_transform(self,A):
# convert basis back to waveforms using fit
new_waveforms = self._DL.inverse_transform(A)
return new_waveforms
def get_params(self):
# TODO know what catalog was used! (include waveform metadata)
params = self._DL.get_params()
params['num_components'] = params.pop('n_components')
params['Decompositon'] = self._decomposition
return params
def get_basis(self):
""" Return the SPCA basis vectors (Z^\dagger)"""
return self._DL.components_
def get_representations(graph, rep_method, verbose = True, return_rep_method = False, nodes_to_embed = None):
if rep_method.method == "degseqs" and rep_method.p is not None:
graph.max_degree = rep_method.p #so that we can get degseqs of an arbitrary length (basically by padding with 0s)
if verbose:
print "Until layer: ", rep_method.max_layer
print "sampling method: ", rep_method.sampling_method
print "attribute class sizes: ", graph.attribute_class_sizes
#Explicitly featurize the nodes
feature_matrix = get_features(graph, rep_method, verbose, nodes_to_embed)
if graph.directed == False:
feature_matrix = np.hstack((feature_matrix, feature_matrix))
if graph.directed:
# print "got outdegree degseqs, now getting indegree..."
indegree_graph = Graph(graph.G_adj.T, weighted = graph.weighted, signed = graph.signed, directed = graph.directed, node_features = graph.node_features)
indegree_feature_matrix = get_features(indegree_graph, rep_method, verbose, nodes_to_embed)
# print feature_matrix.shape
# print indegree_feature_matrix.shape
feature_matrix = np.hstack((np.dot(feature_matrix, 1), np.dot(indegree_feature_matrix, 17)))
if verbose:
print "Dimensionality in explicit feature space: ", feature_matrix.shape
if rep_method.method == "degseqs": #want explicit featurization of nodes by deg sequences of neighbors
if verbose:
print "returning explicit features"
return feature_matrix
#Get landmark nodes
if rep_method.p is None:
rep_method.p = get_feature_dimensionality(graph, rep_method, verbose = verbose) #k*log(n), where k = 10
elif rep_method.p > graph.N or (nodes_to_embed is not None and rep_method.p > len(nodes_to_embed)):
# print "Warning: dimensionality greater than number of nodes to embed. Reducing to n"
if (nodes_to_embed is not None and rep_method.p > len(nodes_to_embed)):
rep_method.p = len(nodes_to_embed)
else:
rep_method.p = graph.N
landmarks = get_sample_nodes(graph, rep_method, verbose = verbose, nodes_to_embed = nodes_to_embed)
if verbose:
print "landmark IDs: ", landmarks
print feature_matrix.shape
rep_method.landmarks = feature_matrix[landmarks]
rep_method.landmark_indices = landmarks
if nodes_to_embed is None:
nodes_to_embed = range(graph.N)
num_nodes = graph.N
else:
num_nodes = len(nodes_to_embed)
C = np.zeros((num_nodes,rep_method.p))
for graph_node in range(num_nodes):#nodes_to_embed:
for landmark_node in range(rep_method.p):
if rep_method.method == "struc2vec":
#use struc2vec similarities
C[graph_node,landmark_node] = struc2vec_sim_matrix[graph_node, landmarks[landmark_node]]
else:
if rep_method.landmarks is not None: #landmarks are hard coded as actual features of landmark nodes
landmark_node_features = rep_method.landmarks[landmark_node]
else:
landmark_node_features = feature_matrix[landmarks[landmark_node]] #landmarks are indices of landmark nodes
C[graph_node,landmark_node] = compute_similarity(graph, rep_method, feature_matrix[graph_node],
landmark_node_features, graph.node_attributes, (graph_node, landmark_node), attribute_class_sizes = graph.attribute_class_sizes)
if rep_method.landmarks is None or not rep_method.use_landmarks:
W_pinv = np.linalg.pinv(C[landmarks]) #make W have same entries for aligning nodes?
else: #we have hard coded landmarks, compute their pairwise similarities
W = np.zeros((rep_method.landmarks.shape[0], rep_method.landmarks.shape[0]))
for i in range(W.shape[0]):
for j in range(W.shape[1]): #NOTE based on structure only for now
W[i,j] = compute_similarity(graph, rep_method, rep_method.landmarks[i], rep_method.landmarks[j])
W_pinv = np.linalg.pinv(W)
#Nystrom approximation: S' = CWC^T /approx S, the full nxn similarity matrix
#xnetmf: rank-p factorization of similarity matrix /approx skipgram:
#YZ /approx S ==> Y as learned by struc2vec
#Take rank-k factorization of S' to approximate skipgram embeddings
#But Csqrt(W) * sqrt(W)C^T = S', and Csqrt(W) is rank k
#So take Csqrt(W) as our representation
if rep_method.implicit_factorization:
# if np.linalg.matrix_rank(C[landmarks]) == C[landmarks].shape[0]:
# # print ':)'
# reprsn = np.dot(C, sp.linalg.sqrtm(W_pinv))
# else:
if verbose:
print("W is singular: rank %d vs size %d" % (np.linalg.matrix_rank(C[landmarks]), C[landmarks].shape[0])), C[landmarks]
U,X,V = np.linalg.svd(W_pinv)
# dim = U_f.shape[1]
# K = min(dim, 24)
# print K
# print X_f
# U = U_f[:K]
sqrtW_substitute = np.dot(U, np.diag(np.sqrt(X)))
reprsn = np.dot(C, sqrtW_substitute) #make representation have same entries for aligning nodes?
else:
Sapprox = np.dot(np.dot(C, W_pinv), C.T)
print "created similarity matrix"
#doesn't work since low rank approx can have negative values
#nmf = NMF(n_components = W_pinv.shape[0], init='random', random_state=0)
nmf = DictionaryLearning(n_components = W_pinv.shape[0], random_state=0)
reprsn = nmf.fit_transform(Sapprox)
print "...and factorized it"
reprsn = reprsn.todense()
if rep_method.normalize:
# print("normalizing...")
norms = np.linalg.norm(reprsn, axis = 1).reshape((reprsn.shape[0],1))
norms[norms == 0] = 1 #TODO figure out why getting zeros representation
reprsn = reprsn / norms
if return_rep_method:
return reprsn, rep_method
return reprsn
#!/usr/bin/python # -*- coding: utf-8 -*- #[email protected] """ 字典学习 """ print(__doc__) import matplotlib.pyplot as plt import matplotlib as mpl import numpy as np from sklearn.decomposition import DictionaryLearning mpl.style.use('fivethirtyeight') from sklearn.datasets import make_circles np.random.seed(0) X, y = make_circles(n_samples=400, factor=.3, noise=.05) pca = DictionaryLearning(n_components=2) X_pca = pca.fit_transform(X) fig = plt.figure() ax = fig.add_subplot(211) ax.scatter(X[:, 0], X[:, 1], c=y) ax.axis("equal") ax = fig.add_subplot(212) ax.scatter(X_pca[:, 0], X_pca[:, 1], c=y) ax.axis("equal") plt.show()
data = data['ftdata_NLM']
temp = data[LR_flag, :]
m = np.mean(temp, 1)
temp = temp - m[:, None]
s = np.std(temp, 1) + 1e-16
temp = temp / s[:, None]
msk_small_region = (dfs_left.labels == 46) | (dfs_left.labels == 28) | (
dfs_left.labels == 29) # % motor
d = temp[msk_small_region, :]
d_corr = temp[~msk_small_region, :]
rho = np.corrcoef(d, d_corr)
rho = rho[range(d.shape[0]), d.shape[0] + 1:]
rho[~np.isfinite(rho)] = 0
DL = DictionaryLearning(n_components=8)
labs = DL.fit_transform(rho)
print(labs.shape)
labs = labs.argmax(1)
r = dfs_left_sm
r.labels = r.labels * 0
r.labels[msk_small_region] = labs
mesh = mlab.triangular_mesh(r.vertices[:, 0],
r.vertices[:, 1],
r.vertices[:, 2],
r.faces,
representation='surface',
opacity=1,
scalars=np.float64(r.labels))
#mlab.pipeline.surface(mesh)
mlab.gcf().scene.parallel_projection = True
# Target Domain
dict_feat = [None] * 30
for subs in range(30):
print(subs)
feat = features[0, subs]
#dict_sparse = DictionaryLearning(alpha=0.1, n_components=105, max_iter=10, transform_n_nonzero_coefs=105, verbose=3)
#dict_sparse = SparsePCA(n_components=105, max_iter=3)
#dict_sparse = MiniBatchDictionaryLearning(alpha=1, n_components=105, batch_size=10, n_iter=100)
#dict_sparse.fit(feat)
#Dt_0 = dict_sparse.components_
#coder = SparseCoder(dictionary = Dt_0, transform_n_nonzero_coefs=105)
#Rt_0 = coder.transform(feat)
dict_sparse = SparsePCA(alpha=1, n_components=105, max_iter=20, verbose=3)
Rt_0 = dict_sparse.fit_transform(feat)
dict_feat[subs] = Rt_0
target_folder = 'C:\\Users\\Pouya\\Documents\\MATLAB\\DECAF\\Analysis\\Movie_Genre_adaptation\\feats_trans2.mat'
sio.savemat(target_folder, {'dict_feat': dict_feat, 'movie_feat': Rs_0})
## Music Genre classification
source_folder = 'C:\\Users\\Pouya\\Documents\\MATLAB\\DECAF\\Analysis\\MusicGenreClassification\\feats.mat'
dict = sio.loadmat(source_folder)
MCA_Ft = dict['MCA_Ft']
MEG_Ft = dict['MEG_Ft']
EEG_Ft = dict['EEG_Ft']
# Source Domain
cmp_num = 4
def btnConvert_click(self):
msgBox = QMessageBox()
Fit = ui.cbFit.currentText()
Transform = ui.cbTransform.currentText()
# Tol
try:
Tol = np.float(ui.txtTole.text())
except:
msgBox.setText("Tolerance is wrong!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
# MaxIte
try:
MaxIter = np.int32(ui.txtMaxIter.text())
except:
msgBox.setText("Maximum number of iterations is wrong!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
if MaxIter < 1:
msgBox.setText("Maximum number of iterations is wrong!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
# Alpha
try:
Alpha = np.float(ui.txtAlpha.text())
except:
msgBox.setText("Alpha is wrong!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
# Number of Job
try:
NJob = np.int32(ui.txtJobs.text())
except:
msgBox.setText("The number of parallel jobs is wrong!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
if NJob < 1:
msgBox.setText("The number of parallel jobs must be greater than 1!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
# OutFile
OutFile = ui.txtOutFile.text()
if not len(OutFile):
msgBox.setText("Please enter out file!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
# InFile
InFile = ui.txtInFile.text()
if not len(InFile):
msgBox.setText("Please enter input file!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
if not os.path.isfile(InFile):
msgBox.setText("Input file not found!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
if ui.rbScale.isChecked() == True and ui.rbALScale.isChecked() == False:
msgBox.setText("Subject Level Normalization is just available for Subject Level Analysis!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
InData = io.loadmat(InFile)
OutData = dict()
OutData["imgShape"] = InData["imgShape"]
if not len(ui.txtData.currentText()):
msgBox.setText("Please enter Data variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
try:
X = InData[ui.txtData.currentText()]
if ui.cbScale.isChecked() and (not ui.rbScale.isChecked()):
X = preprocessing.scale(X)
print("Whole of data is scaled X~N(0,1).")
except:
print("Cannot load data")
return
try:
NumFea = np.int32(ui.txtNumFea.text())
except:
msgBox.setText("Number of features is wrong!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
if NumFea < 1:
msgBox.setText("Number of features must be greater than zero!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
if NumFea > np.shape(X)[1]:
msgBox.setText("Number of features is wrong!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
# Subject
if not len(ui.txtSubject.currentText()):
msgBox.setText("Please enter Subject variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
try:
Subject = InData[ui.txtSubject.currentText()]
OutData[ui.txtOSubject.text()] = Subject
except:
print("Cannot load Subject ID")
return
# Label
if not len(ui.txtLabel.currentText()):
msgBox.setText("Please enter Label variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
OutData[ui.txtOLabel.text()] = InData[ui.txtLabel.currentText()]
# Task
if ui.cbTask.isChecked():
if not len(ui.txtTask.currentText()):
msgBox.setText("Please enter Task variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
OutData[ui.txtOTask.text()] = InData[ui.txtTask.currentText()]
# Run
if ui.cbRun.isChecked():
if not len(ui.txtRun.currentText()):
msgBox.setText("Please enter Run variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
OutData[ui.txtORun.text()] = InData[ui.txtRun.currentText()]
# Counter
if ui.cbCounter.isChecked():
if not len(ui.txtCounter.currentText()):
msgBox.setText("Please enter Counter variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
OutData[ui.txtOCounter.text()] = InData[ui.txtCounter.currentText()]
# Matrix Label
if ui.cbmLabel.isChecked():
if not len(ui.txtmLabel.currentText()):
msgBox.setText("Please enter Matrix Label variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
OutData[ui.txtOmLabel.text()] = InData[ui.txtmLabel.currentText()]
# Design
if ui.cbDM.isChecked():
if not len(ui.txtDM.currentText()):
msgBox.setText("Please enter Design Matrix variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
OutData[ui.txtODM.text()] = InData[ui.txtDM.currentText()]
# Coordinate
if ui.cbCol.isChecked():
if not len(ui.txtCol.currentText()):
msgBox.setText("Please enter Coordinator variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
OutData[ui.txtOCol.text()] = InData[ui.txtCol.currentText()]
# Condition
if ui.cbCond.isChecked():
if not len(ui.txtCond.currentText()):
msgBox.setText("Please enter Condition variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
OutData[ui.txtOCond.text()] = InData[ui.txtCond.currentText()]
# Number of Scan
if ui.cbNScan.isChecked():
if not len(ui.txtScan.currentText()):
msgBox.setText("Please enter Number of Scan variable name!")
msgBox.setIcon(QMessageBox.Critical)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
return False
OutData[ui.txtOScan.text()] = InData[ui.txtScan.currentText()]
Models = dict()
Models["Name"] = "DictionaryLearning"
if ui.rbALScale.isChecked():
print("Partition data to subject level ...")
SubjectUniq = np.unique(Subject)
X_Sub = list()
for subj in SubjectUniq:
if ui.cbScale.isChecked() and ui.rbScale.isChecked():
X_Sub.append(preprocessing.scale(X[np.where(Subject == subj)[1], :]))
print("Data in subject level is scaled, X_" + str(subj) + "~N(0,1).")
else:
X_Sub.append(X[np.where(Subject == subj)[1],:])
print("Subject ", subj, " is extracted from data.")
print("Running Dictionary Learning in subject level ...")
X_Sub_PCA = list()
lenPCA = len(X_Sub)
for xsubindx, xsub in enumerate(X_Sub):
model = DictionaryLearning(n_components=NumFea,alpha=Alpha,max_iter=MaxIter,\
tol=Tol,fit_algorithm=Fit,transform_alpha=Transform,n_jobs=NJob)
X_Sub_PCA.append(model.fit_transform(xsub))
Models["Model" + str(xsubindx + 1)] = str(model.get_params(deep=True))
print("Dictionary Learning: ", xsubindx + 1, " of ", lenPCA, " is done.")
print("Data integration ... ")
X_new = None
for xsubindx, xsub in enumerate(X_Sub_PCA):
X_new = np.concatenate((X_new, xsub)) if X_new is not None else xsub
print("Integration: ", xsubindx + 1, " of ", lenPCA, " is done.")
OutData[ui.txtOData.text()] = X_new
else:
print("Running Dictionary Learning ...")
model = DictionaryLearning(n_components=NumFea, alpha=Alpha, max_iter=MaxIter, \
tol=Tol, fit_algorithm=Fit, transform_alpha=Transform, n_jobs=NJob)
OutData[ui.txtOData.text()] = model.fit_transform(X)
Models["Model"] = str(model.get_params(deep=True))
OutData["ModelParameter"] = Models
print("Saving ...")
io.savemat(ui.txtOutFile.text(), mdict=OutData)
print("DONE.")
msgBox.setText("Dictionary Learning is done.")
msgBox.setIcon(QMessageBox.Information)
msgBox.setStandardButtons(QMessageBox.Ok)
msgBox.exec_()
class SC(object):
"""
Wrapper for sklearn package. Performs sparse coding
Sparse Coding, or Dictionary Learning has 5 methods:
- fit(waveforms)
update class instance with Sparse Coding fit
- fit_transform()
do what fit() does, but additionally return the projection onto new basis space
- inverse_transform(A)
inverses the decomposition, returns waveforms for an input A, using Z^\dagger
- get_basis()
returns the basis vectors Z^\dagger
- get_params()
returns metadata used for fits.
"""
def __init__(self,
num_components=10,
catalog_name='unknown',
alpha=0.001,
transform_alpha=0.01,
max_iter=2000,
tol=1e-9,
n_jobs=1,
verbose=True,
random_state=None):
self._decomposition = 'Sparse Coding'
self._num_components = num_components
self._catalog_name = catalog_name
self._alpha = alpha
self._transform_alpha = 0.001
self._n_jobs = n_jobs
self._random_state = random_state
self._DL = DictionaryLearning(n_components=self._num_components,
alpha=self._alpha,
transform_alpha=self._transform_alpha,
n_jobs=self._n_jobs,
verbose=verbose,
random_state=self._random_state)
def fit(self, waveforms):
# TODO make sure there are more columns than rows (transpose if not)
# normalize waveforms
self._waveforms = waveforms
self._DL.fit(self._waveforms)
def fit_transform(self, waveforms):
# TODO make sure there are more columns than rows (transpose if not)
# normalize waveforms
self._waveforms = waveforms
self._A = self._DL.fit_transform(self._waveforms)
return self._A
def inverse_transform(self, A):
# convert basis back to waveforms using fit
new_waveforms = self._DL.inverse_transform(A)
return new_waveforms
def get_params(self):
# TODO know what catalog was used! (include waveform metadata)
params = self._DL.get_params()
params['num_components'] = params.pop('n_components')
params['Decompositon'] = self._decomposition
return params
def get_basis(self):
""" Return the SPCA basis vectors (Z^\dagger)"""
return self._DL.components_
conn_vec = np.array(conn_vec).T
conn_vec_ASD = conn_vec[:, ASD_index]
conn_vec_TD = conn_vec[:, TD_index]
conn_vec_sorted = np.concatenate((conn_vec_ASD, conn_vec_TD), axis=1)
print('ASD : ', conn_vec_ASD.shape, ' ', 'TD : ', conn_vec_TD.shape, ' ',
'conn_vec : ', conn_vec_sorted.shape)
np.save(savepath)
# # Sparse Dictrionary Learning
from sklearn.decomposition import DictionaryLearning
SDL = DictionaryLearning(n_components=100, alpha=100)
Dict_ASD = SDL.fit_transform(conn_vec_ASD)
repres_ASD = SDL.components_
Dict_TD = SDL.fit_transform(conn_vec_TD)
repres_TD = SDL.components_
from sklearn.decomposition import DictionaryLearning
SDL = DictionaryLearning(n_components=15, alpha=13)
Dict_total = SDL.fit_transform(conn_vec_sorted)
repres_total = SDL.components_
print('Dictionary ASD : ', Dict_ASD.shape, ' ', 'Dictionary TD : ',
Dict_TD.shape)
print('Dictionary Total : ', Dict_total.shape)
pca.fit(mov)
#%%
import cv2
comps = np.reshape(pca.components_, [n_comps, 30, 30])
for count, comp in enumerate(comps):
pl.subplot(4, 4, count + 1)
blur = cv2.GaussianBlur(comp.astype(np.float32), (5, 5), 0)
blur = np.array(blur / np.max(blur) * 255, dtype=np.uint8)
ret3, th3 = cv2.threshold(
blur, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU)
pl.imshow((th3 * comp).T)
#%%
n_comps = 3
dl = DictionaryLearning(n_comps, alpha=1, verbose=True)
comps = dl.fit_transform(Yr.T)
comps = np.reshape(comps, [30, 30, n_comps]).transpose([2, 0, 1])
for count, comp in enumerate(comps):
pl.subplot(4, 4, count + 1)
pl.imshow(comp)
#%%
N_ICA_COMPS = 8
ica = FastICA(N_ICA_COMPS, max_iter=10000, tol=10e-8)
ica.fit(pca.components_)
#%
comps = np.reshape(ica.components_, [N_ICA_COMPS, 30, 30])
for count, comp in enumerate(comps):
idx = np.argmax(np.abs(comp))
comp = comp * np.sign(comp.flatten()[idx])
pl.subplot(4, 4, count + 1)
pl.imshow(comp.T)
import numpy as np
import matplotlib.pyplot as plt
from sklearn.datasets import load_digits
from sklearn.decomposition import DictionaryLearning
# For reproducibility
np.random.seed(1000)
if __name__ == '__main__':
# Load MNIST digits
digits = load_digits()
# Perform a dictionary learning (and atom extraction) from the MNIST dataset
dl = DictionaryLearning(n_components=36,
fit_algorithm='lars',
transform_algorithm='lasso_lars')
X_dict = dl.fit_transform(digits.data)
# Show the atoms that have been extracted
fig, ax = plt.subplots(6, 6, figsize=(8, 8))
samples = [dl.components_[x].reshape((8, 8)) for x in range(34)]
for i in range(6):
for j in range(6):
ax[i, j].set_axis_off()
ax[i, j].imshow(samples[(i * 5) + j], cmap='gray')
plt.show()
#array([-2.20719466, -3.16170819, -4.11622173]) tsvd = TruncatedSVD(2) tsvd.fit(iris_data) tsvd.transform(iris_data) #One advantage of TruncatedSVD over PCA is that TruncatedSVD can operate on sparse #matrices while PCA cannot #Decomposition分解 to classify分类 with DictionaryLearning from sklearn.decomposition import DictionaryLearning dl = DictionaryLearning(3) transformed = dl.fit_transform(iris_data[::2]) transformed[:5] #array([[ 0. , 6.34476574, 0. ], #[ 0. , 5.83576461, 0. ], #[ 0. , 6.32038375, 0. ], #[ 0. , 5.89318572, 0. ], #[ 0. , 5.45222715, 0. ]]) #Next, let's fit (not fit_transform) the testing set: transformed = dl.transform(iris_data[1::2]) #Putting it all together with Pipelines #Let's briefly load the iris dataset and seed it with some missing values: from sklearn.datasets import load_iris
y_test = y[1::2]
# 確認
X_train.shape
X_test.shape
# 1 辞書学習の実行 --------------------------------------------------------------------------------
# インスタンス生成
# --- 3種類のアヤメの花を表すため3を指定
dl = DictionaryLearning(n_components=3)
vars(dl)
# 学習
# --- データ全体でなく訓練データで学習
transformed = dl.fit_transform(X_train)
transformed[:5]
# テストデータの変換
test_transform = dl.fit_transform(X_test)
test_transform[:5]
# 2 学習結果の可視化 --------------------------------------------------------------------------------
# プロット設定
fig = plt.figure(figsize=(14, 7))
# 訓練データ
ax = fig.add_subplot(121, projection='3d')
ax.scatter(transformed[:, 0],
transformed[:, 1],
