def get_workflow(self, n_features=int(1E03)):
random_state = 0
C_values = [1, 10]
k_values = 0
k_max = "auto"
n_folds_nested = 5
n_folds = 10
n_perms = 10
if k_max != "auto":
k_values = range_log2(np.minimum(int(k_max), n_features),
add_n=True)
else:
k_values = range_log2(n_features, add_n=True)
cls = Methods(*[
Pipe(SelectKBest(k=k), SVC(C=C, kernel="linear")) for C in C_values
for k in k_values
])
pipeline = CVBestSearchRefit(cls,
n_folds=n_folds_nested,
random_state=random_state)
wf = Perms(CV(pipeline, n_folds=n_folds),
n_perms=n_perms,
permute="y",
random_state=random_state)
return wf
def get_workflow(self):
####################################################################
## EPAC WORKFLOW
# -------------------------------------
# Perms Perm (Splitter)
# / | \
# 0 1 2 Samples (Slicer)
# |
# CV CV (Splitter)
# / | \
# 0 1 2 Folds (Slicer)
# | | |
# Pipeline Pipeline Pipeline Sequence
# |
# 2 SelectKBest (Estimator)
# |
# Methods
# | \
# SVM(linear,C=1) SVM(linear,C=10) Classifiers (Estimator)
pipeline = Pipe(SelectKBest(k=2),
Methods(*[SVC(kernel="linear", C=C)
for C in [1, 3]]))
wf = Perms(CV(pipeline, n_folds=3),
n_perms=3,
permute="y",
random_state=1)
return wf
def test_pipeline(self):
X, y = datasets.make_classification(n_samples=20, n_features=5, n_informative=2)
# = With EPAC
wf = Pipe(SelectKBest(k=2), SVC(kernel="linear"))
r_epac = wf.top_down(X=X, y=y)
# = With SKLEARN
pipe = sklearn.pipeline.Pipeline([("anova", SelectKBest(k=2)), ("svm", SVC(kernel="linear"))])
r_sklearn = pipe.fit(X, y).predict(X)
key2cmp = "y" + conf.SEP + conf.PREDICTION
# = Comparison
self.assertTrue(np.all(r_epac[key2cmp] == r_sklearn), u"Diff in Pipe: EPAC vs sklearn")
# test reduce
r_epac_reduce = wf.reduce().values()[0][key2cmp]
self.assertTrue(np.all(r_epac_reduce == r_sklearn), u"Diff in Pipe: EPAC reduce")
def test_constructor_avoid_collision_level2(self):
# Test that level 2 collisions are avoided
pm = Methods(*[Pipe(SelectKBest(k=2), SVC(kernel="linear", C=C))
for C in [1, 10]])
leaves_key = [l.get_key() for l in pm.walk_leaves()]
self.assertTrue(len(leaves_key) == len(set(leaves_key)),
u'Collision could not be avoided')
def do_all(options):
if options.k_max != "auto":
k_values = range_log2(np.minimum(int(options.k_max),
options.n_features),
add_n=True)
else:
k_values = range_log2(options.n_features, add_n=True)
C_values = [1, 10]
random_state = 0
#print options
#sys.exit(0)
if options.trace:
from epac import conf
conf.TRACE_TOPDOWN = True
## 1) Build dataset
## ================
X, y = datasets.make_classification(n_samples=options.n_samples,
n_features=options.n_features,
n_informative=options.n_informative)
## 2) Build Workflow
## =================
time_start = time.time()
## CV + Grid search of a pipeline with a nested grid search
cls = Methods(*[
Pipe(SelectKBest(k=k), SVC(kernel="linear", C=C)) for C in C_values
for k in k_values
])
pipeline = CVBestSearchRefit(cls,
n_folds=options.n_folds_nested,
random_state=random_state)
wf = Perms(CV(pipeline, n_folds=options.n_folds),
n_perms=options.n_perms,
permute="y",
random_state=random_state)
print "Time ellapsed, tree construction:", time.time() - time_start
## 3) Run Workflow
## ===============
time_fit_predict = time.time()
## Run on local machine
sfw_engine = SomaWorkflowEngine(tree_root=wf,
num_processes=options.n_cores)
## Run on cluster
# sfw_engine = SomaWorkflowEngine(
# tree_root=wf,
# num_processes=options.n_cores,
# resource_id="jl237561@gabriel",
# login="******")
wf = sfw_engine.run(X=X, y=y)
print "Time ellapsed, fit predict:", time.time() - time_fit_predict
time_reduce = time.time()
## 4) Reduce Workflow
## ==================
print wf.reduce()
print "Time ellapsed, reduce:", time.time() - time_reduce
def test_pipeline(self):
X, y = datasets.make_classification(n_samples=20,
n_features=5,
n_informative=2)
# = With EPAC
wf = Pipe(SelectKBest(k=2), SVC(kernel="linear"))
r_epac = wf.top_down(X=X, y=y)
# = With SKLEARN
pipe = sklearn.pipeline.Pipeline([('anova', SelectKBest(k=2)),
('svm', SVC(kernel="linear"))])
r_sklearn = pipe.fit(X, y).predict(X)
key2cmp = 'y' + conf.SEP + conf.PREDICTION
# = Comparison
self.assertTrue(np.all(r_epac[key2cmp] == r_sklearn),
u'Diff in Pipe: EPAC vs sklearn')
# test reduce
r_epac_reduce = wf.reduce().values()[0][key2cmp]
self.assertTrue(np.all(r_epac_reduce == r_sklearn),
u'Diff in Pipe: EPAC reduce')
def get_workflow(self):
n_folds = 2
n_folds_nested = 3
k_values = [1, 2]
C_values = [1, 2]
pipelines = Methods(*[Pipe(SelectKBest(k=k),
Methods(*[SVC(kernel="linear", C=C)
for C in C_values]))
for k in k_values])
pipeline = CVBestSearchRefitParallel(pipelines,
n_folds=n_folds_nested)
wf = CV(pipeline, n_folds=n_folds)
return wf
def test_cv_best_search_refit_parallel(self):
n_folds = 2
n_folds_nested = 3
k_values = [1, 2]
C_values = [1, 2]
n_samples = 500
n_features = 10000
n_cores = 2
X, y = datasets.make_classification(n_samples=n_samples,
n_features=n_features,
n_informative=5)
# epac workflow for paralle computing
pipelines = Methods(*[
Pipe(SelectKBest(
k=k), Methods(*[SVC(kernel="linear", C=C) for C in C_values]))
for k in k_values
])
pipeline = CVBestSearchRefitParallel(pipelines, n_folds=n_folds_nested)
wf = CV(pipeline, n_folds=n_folds)
sfw_engine = SomaWorkflowEngine(tree_root=wf,
num_processes=n_cores,
remove_finished_wf=False,
remove_local_tree=False)
sfw_engine_wf = sfw_engine.run(X=X, y=y)
# epac workflow for normal node computing
pipelines2 = Methods(*[
Pipe(SelectKBest(
k=k), Methods(*[SVC(kernel="linear", C=C) for C in C_values]))
for k in k_values
])
pipeline2 = CVBestSearchRefitParallel(pipelines2,
n_folds=n_folds_nested)
wf2 = CV(pipeline2, n_folds=n_folds)
wf2.run(X=X, y=y)
self.assertTrue(compare_two_node(sfw_engine_wf, wf2))
self.assertTrue(comp_2wf_reduce_res(sfw_engine_wf, wf2))
def test_cvbestsearchrefit_select_k_best(self):
list_C_value = range(2, 10, 1)
# print repr(list_C_value)
for C_value in list_C_value:
# C_value = 2
# print C_value
X, y = datasets.make_classification(n_samples=100,
n_features=500,
n_informative=5)
n_folds_nested = 2
#random_state = 0
k_values = [2, 3, 4, 5, 6]
key_y_pred = 'y' + conf.SEP + conf.PREDICTION
# With EPAC
methods = Methods(*[Pipe(SelectKBest(k=k),
SVC(C=C_value, kernel="linear"))
for k in k_values])
wf = CVBestSearchRefitParallel(methods, n_folds=n_folds_nested)
wf.run(X=X, y=y)
r_epac = wf.reduce().values()[0]
# - Without EPAC
from sklearn.pipeline import Pipeline
r_sklearn = dict()
clf = Pipeline([('anova', SelectKBest(k=3)),
('svm', SVC(C=C_value, kernel="linear"))])
parameters = {'anova__k': k_values}
cv_nested = StratifiedKFold(y=y, n_folds=n_folds_nested)
gscv = grid_search.GridSearchCV(clf, parameters, cv=cv_nested)
gscv.fit(X, y)
r_sklearn[key_y_pred] = gscv.predict(X)
r_sklearn[conf.BEST_PARAMS] = gscv.best_params_
r_sklearn[conf.BEST_PARAMS]['k'] = \
r_sklearn[conf.BEST_PARAMS]['anova__k']
# - Comparisons
comp = np.all(r_epac[key_y_pred] == r_sklearn[key_y_pred])
self.assertTrue(comp,
u'Diff CVBestSearchRefitParallel: prediction')
for key_param in r_epac[conf.BEST_PARAMS][0]:
if key_param in r_sklearn[conf.BEST_PARAMS]:
comp = r_sklearn[conf.BEST_PARAMS][key_param] == \
r_epac[conf.BEST_PARAMS][0][key_param]
self.assertTrue(
comp,
u'Diff CVBestSearchRefitParallel: best parameters')
def test_peristence_load_and_fit_predict(self):
X, y = datasets.make_classification(n_samples=20,
n_features=10,
n_informative=2)
n_folds = 2
n_folds_nested = 3
k_values = [1, 2]
C_values = [1, 2]
pipelines = Methods(*[
Pipe(SelectKBest(
k=k), Methods(*[SVC(kernel="linear", C=C) for C in C_values]))
for k in k_values
])
pipeline = CVBestSearchRefitParallel(pipelines, n_folds=n_folds_nested)
tree_mem = CV(pipeline,
n_folds=n_folds,
reducer=ClassificationReport(keep=False))
# Save Tree
import tempfile
store = StoreFs(dirpath=tempfile.mkdtemp(), clear=True)
tree_mem.save_tree(store=store)
tree_mem.run(X=X, y=y)
res_mem = tree_mem.reduce().values()[0]
# Reload Tree
tree_fs_noresults = store.load()
tree_fs_noresults.run(X=X, y=y)
res_fs_noresults = tree_fs_noresults.reduce().values()[0]
# Save with results
tree_fs_noresults.save_tree(store=store)
tree_fs_withresults = store.load()
res_fs_withresults = tree_fs_withresults.reduce().values()[0]
# Compare
comp = np.all([
np.all(np.asarray(res_mem[k]) == np.asarray(res_fs_noresults[k]))
and np.all(
np.asarray(res_fs_noresults[k]) == np.asarray(
res_fs_withresults[k])) for k in res_mem
])
self.assertTrue(comp)
def get_workflow(self):
####################################################################
## EPAC WORKFLOW
# -------------------------------------
# Perms Perm (Splitter)
# / | \
# 0 1 2 Samples (Slicer)
# |
# CV CV (Splitter)
# / | \
# 0 1 2 Folds (Slicer)
# | | |
# Pipeline Pipeline Pipeline Sequence
# |
# 2 SelectKBest (Estimator)
# |
# Methods
# | \
# SVM(linear,C=1) SVM(linear,C=10) Classifiers (Estimator)
pipeline = Pipe(SelectKBest(k=2),
Methods(*[SVC(kernel="linear", C=C) for C in [1, 3]]))
wf = CV(pipeline, n_folds=3, reducer=ClassificationReport(keep=True))
return wf
def _search_best(self, **Xy):
# Fit/predict CV grid search
self.cv.store = StoreMem() # local store erased at each fit
from epac.workflow.pipeline import Pipe
self.cv.top_down(**Xy)
# Pump-up results
cv_result_set = self.cv.reduce(store_results=False)
key_val = [(result.key(), result[self.score])
for result in cv_result_set]
scores = np.asarray(zip(*key_val)[1])
scores_opt = np.max(scores) if self.arg_max else np.min(scores)
idx_best = np.where(scores == scores_opt)[0][0]
best_key = key_val[idx_best][0]
# Find nodes that match the best
nodes_dict = {
n.get_signature(): n
for n in self.cv.walk_true_nodes()
if n.get_signature() in key_split(best_key)
}
to_refit = Pipe(
*[nodes_dict[k].wrapped_node for k in key_split(best_key)])
best_params = [dict(sig) for sig in key_split(best_key, eval=True)]
return to_refit, best_params
def do_all(options):
if options.k_max != "auto":
k_values = range_log2(np.minimum(int(options.k_max),
options.n_features),
add_n=True)
else:
k_values = range_log2(options.n_features, add_n=True)
C_values = [1, 10]
random_state = 0
#print options
#sys.exit(0)
if options.trace:
from epac import conf
conf.TRACE_TOPDOWN = True
## 1) Build dataset
## ================
X, y = datasets.make_classification(n_samples=options.n_samples,
n_features=options.n_features,
n_informative=options.n_informative)
## 2) Build Workflow
## =================
time_start = time.time()
## CV + Grid search of a pipeline with a nested grid search
cls = Methods(*[
Pipe(SelectKBest(k=k), SVC(kernel="linear", C=C)) for C in C_values
for k in k_values
])
pipeline = CVBestSearchRefit(cls,
n_folds=options.n_folds_nested,
random_state=random_state)
wf = Perms(CV(pipeline, n_folds=options.n_folds),
n_perms=options.n_perms,
permute="y",
random_state=random_state)
print "Time ellapsed, tree construction:", time.time() - time_start
## 3) Export Workflow to soma_workflow_gui
## ===============
time_fit_predict = time.time()
if os.path.isdir(options.soma_workflow_dir):
shutil.rmtree(options.soma_workflow_dir)
sfw_engine = SomaWorkflowEngine(tree_root=wf,
num_processes=options.n_cores)
sfw_engine.export_to_gui(options.soma_workflow_dir, X=X, y=y)
print "Time ellapsed, fit predict:", time.time() - time_fit_predict
# ## 6) Load Epac tree & Reduce
# ## ==========================
reduce_filename = os.path.join(options.soma_workflow_dir, "reduce.py")
f = open(reduce_filename, 'w')
reduce_str = """from epac.map_reduce.engine import SomaWorkflowEngine
wf = SomaWorkflowEngine.load_from_gui("%s")
print wf.reduce()
""" % options.soma_workflow_dir
f.write(reduce_str)
f.close()
print "#First run\n"\
"soma_workflow_gui\n"\
"\t(1)Open %s\n"\
"\t(2)Submit\n"\
"\t(3)Transfer Input Files\n"\
"\t...wait...\n"\
"\t(4)Transfer Output Files\n"\
"#When done run:\npython %s" % (
os.path.join(options.soma_workflow_dir,
sfw_engine.open_me_by_soma_workflow_gui),
reduce_filename)
def test_constructor_cannot_avoid_collision_level2(self):
# This should raise an exception since collision cannot be avoided
self.assertRaises(ValueError, Methods,
*[Pipe(SelectKBest(k=2), SVC(kernel="linear", C=C))
for C in [1, 1]])
def todo_perm_cv_grid_vs_sklearn(self):
X, y = datasets.make_classification(n_samples=100,
n_features=500,
n_informative=5)
n_perms = 3
n_folds = 2
n_folds_nested = 2
random_state = 0
k_values = [2, 3]
C_values = [1, 10]
# = With EPAC
pipelines = Methods(*[Pipe(SelectKBest(k=k),
SVC(C=C, kernel="linear"))
for C in C_values
for k in k_values])
#print [n for n in pipelines.walk_leaves()]
pipelines_cv = CVBestSearchRefit(pipelines,
n_folds=n_folds_nested,
random_state=random_state)
wf = Perms(CV(pipelines_cv, n_folds=n_folds,
reducer=ClassificationReport(keep=True)),
n_perms=n_perms, permute="y",
reducer=PvalPerms(keep=True),
random_state=random_state)
wf.fit_predict(X=X, y=y)
r_epac = wf.reduce().values()[0]
for key in r_epac:
print("key=" + repr(key) + ", value=" + repr(r_epac[key]))
# = With SKLEARN
from sklearn.cross_validation import StratifiedKFold
from epac.sklearn_plugins import Permutations
from sklearn.pipeline import Pipeline
from sklearn import grid_search
clf = Pipeline([('anova', SelectKBest(k=3)),
('svm', SVC(kernel="linear"))])
parameters = {'anova__k': k_values, 'svm__C': C_values}
r_sklearn = dict()
r_sklearn['pred_te'] = [[None] * n_folds for i in range(n_perms)]
r_sklearn['true_te'] = [[None] * n_folds for i in range(n_perms)]
r_sklearn['score_tr'] = [[None] * n_folds for i in range(n_perms)]
r_sklearn['score_te'] = [[None] * n_folds for i in range(n_perms)]
r_sklearn['mean_score_te'] = [None] * n_perms
r_sklearn['mean_score_tr'] = [None] * n_perms
perm_nb = 0
perms = Permutations(n=y.shape[0],
n_perms=n_perms,
random_state=random_state)
for idx in perms:
#idx = perms.__iter__().next()
y_p = y[idx]
cv = StratifiedKFold(y=y_p, n_folds=n_folds)
fold_nb = 0
for idx_train, idx_test in cv:
#idx_train, idx_test = cv.__iter__().next()
X_train = X[idx_train, :]
X_test = X[idx_test, :]
y_p_train = y_p[idx_train, :]
y_p_test = y_p[idx_test, :]
# Nested CV
cv_nested = StratifiedKFold(y=y_p_train,
n_folds=n_folds_nested)
gscv = grid_search.GridSearchCV(clf, parameters, cv=cv_nested)
gscv.fit(X_train, y_p_train)
r_sklearn['pred_te'][perm_nb][fold_nb] = gscv.predict(X_test)
r_sklearn['true_te'][perm_nb][fold_nb] = y_p_test
r_sklearn['score_tr'][perm_nb][fold_nb] =\
gscv.score(X_train, y_p_train)
r_sklearn['score_te'][perm_nb][fold_nb] =\
gscv.score(X_test, y_p_test)
fold_nb += 1
# Average over folds
r_sklearn['mean_score_te'][perm_nb] = \
np.mean(np.asarray(r_sklearn['score_te'][perm_nb]), axis=0)
r_sklearn['mean_score_tr'][perm_nb] = \
np.mean(np.asarray(r_sklearn['score_tr'][perm_nb]), axis=0)
#np.mean(R2[key]['score_tr'][perm_nb])
perm_nb += 1
print(repr(r_sklearn))
# - Comparisons
shared_keys = set(r_epac.keys()).intersection(set(r_sklearn.keys()))
comp = {k: np.all(np.asarray(r_epac[k]) == np.asarray(r_sklearn[k]))
for k in shared_keys}
print("comp=" + repr(comp))
#return comp
for key in comp:
self.assertTrue(comp[key], u'Diff for attribute: "%s"' % key)
Xy = np.load(datasets_filepath)
X = Xy["X"]
y = Xy["y"]
from sklearn.svm import LinearSVC as SVM
from sklearn.feature_selection import SelectKBest
from sklearn import preprocessing
##############################################################################
## Pipeline, "Pipe": SelectKBest + StandardScaler + SVM l1 vs l2
from epac import Pipe, CV
n_folds = 10
anova_svm = Pipe(SelectKBest(k=5),
preprocessing.StandardScaler(),
SVM(class_weight='auto'))
cv = CV(anova_svm, n_folds=n_folds)
cv.run(X=X, y=y)
#
res_cv_anova_svm = cv.reduce()
res_cv_anova_svm["SelectKBest/StandardScaler/LinearSVC"]['y/test/score_recall']
##############################################################################
## Multimethods, "Methods": SVM l1 vs l2
from epac import Methods, CV
svms = Methods(SVM(penalty="l1", class_weight='auto', dual=False),
SVM(penalty="l2", class_weight='auto', dual=False))
cv = CV(svms, n_folds=n_folds)
"""
from sklearn import datasets
from sklearn.svm import LinearSVC as SVM
from sklearn.lda import LDA
from sklearn.feature_selection import SelectKBest
X, y = datasets.make_classification(n_samples=12, n_features=10,
n_informative=2, random_state=1)
# Build sequential Pipeline
# -------------------------
# 2 SelectKBest (Estimator)
# |
# SVM Classifier (Estimator)
from epac import Pipe
pipe = Pipe(SelectKBest(k=2), SVM())
pipe.run(X=X, y=y)
# The downstream data-flow is a keyword arguments (dict) containing X and y.
# It will pass through each processing node, SelectKBest(k=2) and SVM.
# Each node calls the "transform" method, that take a dictionary as input
# and produces a dictionary as output. The output is passed to the next node.
# The return value of the run is simply agregation of the outputs (dict) of
# the leaf nodes
for leaf in pipe.walk_leaves():
print leaf.load_results()
# The result of each branch of the tree is stored in the corresponding leaf.
# An iteration on all the leaves of a tree can return all the results
"""
from sklearn import datasets
from sklearn.svm import LinearSVC as SVM
from sklearn.lda import LDA
from sklearn.feature_selection import SelectKBest
X, y = datasets.make_classification(n_samples=12, n_features=10,
n_informative=2, random_state=1)
# Build sequential Pipeline
# -------------------------
# 2 SelectKBest (Estimator)
# |
# SVM Classifier (Estimator)
from epac import Pipe
pipe = Pipe(SelectKBest(k=2), SVM())
pipe.run(X=X, y=y)
# The downstream data-flow is a keyword arguments (dict) containing X and y.
# It will pass through each processing node, SelectKBest(k=2) and SVM.
# Each node call the "transform" method, that take a dictionnary as input
# and produces a dictionnary as output. The output is passed to the next node.
# The return value of the run is simply agregation of the outputs (dict) of
# the leaf nodes
## Parallelization
## ===============
# Multi-classifiers
# -----------------
from sklearn import datasets
from sklearn.svm import LinearSVC as SVM
from sklearn.discriminant_analysis import LinearDiscriminantAnalysis as LDA
from sklearn.feature_selection import SelectKBest
X, y = datasets.make_classification(n_samples=12,
n_features=10,
n_informative=2,
random_state=1)
# Build sequential Pipeline
# -------------------------
# 2 SelectKBest (Estimator)
# |
# SVM Classifier (Estimator)
from epac import Pipe
pipe = Pipe(SelectKBest(k=2), SVM())
pipe.run(X=X, y=y)
# The downstream data-flow is a keyword arguments (dict) containing X and y.
# It will pass through each processing node, SelectKBest(k=2) and SVM.
# Each node calls the "transform" method, that take a dictionary as input
# and produces a dictionary as output. The output is passed to the next node.
# The return value of the run is simply agregation of the outputs (dict) of
# the leaf nodes
for leaf in pipe.walk_leaves():
print(leaf.load_results())
# The result of each branch of the tree is stored in the corresponding leaf.
# An iteration on all the leaves of a tree can return all the results
Xd.PAS2gr[Xd.PAS2gr == 1] = -1
Xd.PAS2gr[Xd.PAS2gr == 2] = 1
Xd.CB_EXPO[Xd.CB_EXPO == 0] = -1
X = np.asarray(Xd)
y = np.asarray(yd)
#k_values = [1, 2, 3, 4, 5, 10, 15, 20, 25, 27]
C_values = [0.01, 0.05, .1, .5, 1, 5, 10, 100, 1000]
# anova + SVM L1
# ==============
anova_svms = Pipe(
mylib.SelectPvalue(alpha=1e-1),
Methods(*[
SVM(C=C, penalty="l1", class_weight='auto', dual=False)
for C in C_values
]))
# P<0.05
cv = CV(anova_svms, cv_type="stratified", n_folds=10)
a = cv.run(X=X, y=y)
cv_results = cv.reduce()
print cv_results
epac.export_csv(
cv, cv_results,
os.path.join(WD, "results",
"cv10_caarms+pas+canabis_anova(p<0.05)_svmsl1.csv"))
# recall_mean: 67%
@author: ed203246
"""
from sklearn import datasets
from sklearn.svm import SVC
from sklearn.lda import LDA
from sklearn.feature_selection import SelectKBest
X, y = datasets.make_classification(n_samples=12,
n_features=10,
n_informative=2)
from epac import Methods, Pipe
self = Methods(*[
Pipe(SelectKBest(k=k), SVC(kernel=kernel, C=C))
for kernel in ("linear", "rbf") for C in [1, 10] for k in [1, 2]
])
self = Methods(
*[Pipe(SelectKBest(k=k), SVC(C=C)) for C in [1, 10] for k in [1, 2]])
import copy
self.fit_predict(X=X, y=y)
self.reduce()
[l.get_key() for l in svms.walk_nodes()]
[l.get_key(2)
for l in svms.walk_nodes()] # intermediary key collisions: trig aggregation
"""
# Model selection using CV: CV + Grid
# -----------------------------------------
from epac import CVBestSearchRefit