def cindex(Y, P):
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
perfs = cindex_multitask(Y, P)
perfs = np.array(perfs)
perfs = perfs[np.invert(np.isnan(perfs))]
return np.mean(perfs)
def disagreement(Y, P):
"""Disagreement error, also known as the pairwise ranking error.
A performance measure for ranking problems. Computes the number
of pairwise disagreements between the correct and predicted rankings.
An O(n^2)-time implementation, can be slow for large problems (loglinear
time implementation would be possible using search trees). For query-structured
data, one would typically want to compute the disagreement separately for each query,
and average.
If 2-dimensional arrays are supplied as arguments, then disagreement
is separately computed for each column, after which the disagreements
are averaged.
Parameters
----------
Y: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Correct utility values, can be any real numbers
P: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Predicted utility values, can be any real numbers.
Returns
-------
disagreement: float
number between 0 and 1
"""
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
perfs = disagreement_multitask(Y,P)
perfs = np.array(perfs)
perfs = perfs[np.invert(np.isnan(perfs))]
if len(perfs) == 0:
raise UndefinedPerformance("No pairs, all the instances have the same label")
perf = np.mean(perfs)
return perf
def accuracy(Y, P):
"""Binary classification accuracy.
A performance measure for binary classification problems.
Returns the fraction of correct class predictions. P[i]>0 is
considered a positive class prediction and P[i]<0 negative.
P[i]==0 is considered as classifier abstaining to make a decision,
which incurs 0.5 errors (in contrast to 0 error for correct and 1
error for incorrect prediction).
If 2-dimensional arrays are supplied as arguments, then accuracy
is separately computed for each column, after which the accuracies
are averaged.
Parameters
----------
Y: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Correct labels, must belong to set {-1,1}
P: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Predicted labels, can be any real numbers.
Returns
-------
accuracy: float
number between 0 and 1
"""
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
return np.mean(accuracy_multitask(Y, P))
def fscore(Y, P):
"""F1-Score.
A performance measure for binary classification problems.
F1 = 2*(Precision*Recall)/(Precision+Recall)
If 2-dimensional arrays are supplied as arguments, then macro-averaged
F-score is computed over the columns.
Parameters
----------
Y: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Correct labels, must belong to set {-1,1}
P: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Predicted labels, can be any real numbers. P[i]>0 is treated
as a positive, and P[i]<=0 as a negative class prediction.
Returns
-------
fscore: float
number between 0 and 1
"""
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
return np.mean(fscore_multitask(Y,P))
def cindex(Y, P):
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
perfs = cindex_multitask(Y, P)
perfs = np.array(perfs)
perfs = perfs[np.invert(np.isnan(perfs))]
return np.mean(perfs)
def fscore(Y, P):
"""F1-Score.
A performance measure for binary classification problems.
F1 = 2*(Precision*Recall)/(Precision+Recall)
If 2-dimensional arrays are supplied as arguments, then macro-averaged
F-score is computed over the columns.
Parameters
----------
Y: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Correct labels, must belong to set {-1,1}
P: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Predicted labels, can be any real numbers. P[i]>0 is treated
as a positive, and P[i]<=0 as a negative class prediction.
Returns
-------
fscore: float
number between 0 and 1
"""
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
return np.mean(fscore_multitask(Y, P))
def cindex(Y, P):
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
perfs = cindex_multitask(Y,P)
perfs = np.array(perfs)
perfs = perfs[np.invert(np.isnan(perfs))]
if len(perfs) == 0:
raise UndefinedPerformance("No pairs, all the instances have the same output")
return np.mean(perfs)
def cindex(Y, P):
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
perfs = cindex_multitask(Y, P)
perfs = np.array(perfs)
perfs = perfs[np.invert(np.isnan(perfs))]
if len(perfs) == 0:
raise UndefinedPerformance(
"No pairs, all the instances have the same output")
return np.mean(perfs)
def __init__(self, svdad, train_labels, regparam=1.0):
self.svdad = svdad
self.Y = array_tools.as_labelmatrix(train_labels)
self.regparam = regparam
self.svals = svdad.svals
self.svecs = svdad.rsvecs
self.results = {}
def __init__(self, svdad, number_of_clusters=2, regparam=1.0, train_labels = None, fixed_indices=None, callback_obj=None):
self.labelcount = number_of_clusters
self.svdad = svdad
self.regparam = regparam
self.svals = svdad.svals
self.svecs = svdad.rsvecs
self.constraint = 0
if self.labelcount == 2:
self.oneclass = True
else:
self.oneclass = False
#if not self.resource_pool.has_key('number_of_clusters'):
# raise Exception("Parameter 'number_of_clusters' must be given.")
self.labelcount = number_of_clusters
self.callbackfun = callback_obj
if train_labels != None:
Y_orig = array_tools.as_labelmatrix(train_labels)
if Y_orig.shape[1] == 1:
self.Y = mat(zeros((Y_orig.shape[0], 2)))
self.Y[:, 0] = Y_orig
self.Y[:, 1] = - Y_orig
self.oneclass = True
else:
self.Y = Y_orig.copy()
self.oneclass = False
for i in range(self.Y.shape[0]):
largestind = 0
largestval = self.Y[i, 0]
for j in range(self.Y.shape[1]):
if self.Y[i, j] > largestval:
largestind = j
largestval = self.Y[i, j]
self.Y[i, j] = -1.
self.Y[i, largestind] = 1.
else:
size = self.svecs.shape[0]
ysize = self.labelcount
if self.labelcount == None: self.labelcount = 2
self.Y = RandomLabelSource(size, ysize).readLabels()
self.size = self.Y.shape[0]
self.labelcount = self.Y.shape[1]
self.classvec = - mat(ones((self.size, 1), dtype = int32))
self.classcounts = mat(zeros((self.labelcount, 1), dtype = int32))
for i in range(self.size):
clazzind = 0
largestlabel = self.Y[i, 0]
for j in range(self.labelcount):
if self.Y[i, j] > largestlabel:
largestlabel = self.Y[i, j]
clazzind = j
self.classvec[i] = clazzind
self.classcounts[clazzind] = self.classcounts[clazzind] + 1
self.svecs_list = []
for i in range(self.size):
self.svecs_list.append(self.svecs[i].T)
self.fixedindices = []
if fixed_indices != None:
self.fixedindices = fixed_indices
self.results = {}
def loadResources(self):
AbstractIterativeLearner.loadResources(self)
if data_sources.TRAIN_LABELS in self.resource_pool:
Y = self.resource_pool[data_sources.TRAIN_LABELS]
self.Y = array_tools.as_labelmatrix(Y)
#Number of training examples
self.size = Y.shape[0]
if Y.shape[1] > 1:
raise Exception('CGRankRLS does not currently work in multi-label mode')
self.learn_from_labels = True
if (data_sources.VALIDATION_FEATURES in self.resource_pool) and (data_sources.VALIDATION_LABELS in self.resource_pool):
validation_X = self.resource_pool[data_sources.VALIDATION_FEATURES]
validation_Y = self.resource_pool[data_sources.VALIDATION_LABELS]
if data_sources.VALIDATION_QIDS in self.resource_pool:
validation_qids = self.resource_pool[data_sources.VALIDATION_QIDS]
else:
validation_qids = None
self.callbackfun = EarlyStopCB(validation_X, validation_Y, validation_qids)
elif data_sources.TRAIN_PREFERENCES in self.resource_pool:
self.pairs = self.resource_pool[data_sources.TRAIN_PREFERENCES]
self.learn_from_labels = False
else:
raise Exception('Neither labels nor preference information found')
X = self.resource_pool[data_sources.TRAIN_FEATURES]
self.X = csc_matrix(X.T)
self.bias = 0.
if data_sources.TRAIN_QIDS in self.resource_pool:
qids = self.resource_pool[data_sources.TRAIN_QIDS]
self.setQids(qids)
self.results = {}
def __init__(self, svdad, train_labels, regparam=1.0):
self.svdad = svdad
self.Y = array_tools.as_labelmatrix(train_labels)
self.size = self.Y.shape[0]
self.regparam = regparam
self.svals = svdad.svals
self.svecs = svdad.rsvecs
self.results = {}
def __init__(self, X_valid, Y_valid, measure=sqerror, maxiter=10):
self.X_valid = array_tools.as_matrix(X_valid)
self.Y_valid = array_tools.as_labelmatrix(Y_valid)
self.measure = measure
self.bestperf = None
self.bestA = None
self.iter = 0
self.last_update = 0
self.maxiter = maxiter
def __init__(self, svdad, train_labels, train_qids, regparam=1.0):
self.svdad = svdad
self.Y = array_tools.as_labelmatrix(train_labels)
self.size = self.Y.shape[0]
self.regparam = regparam
self.svals = svdad.svals
self.svecs = svdad.rsvecs
self.setQids(train_qids)
self.results = {}
def __init__(self, **kwargs):
self.svdad = creators.createSVDAdapter(**kwargs)
self.Y = array_tools.as_labelmatrix(kwargs["train_labels"])
if kwargs.has_key("regparam"):
self.regparam = float(kwargs["regparam"])
else:
self.regparam = 1.
self.svals = self.svdad.svals
self.svecs = self.svdad.rsvecs
self.results = {}
def __init__(self, **kwargs):
self.svdad = creators.createSVDAdapter(**kwargs)
self.Y = array_tools.as_labelmatrix(kwargs["train_labels"])
if kwargs.has_key("regparam"):
self.regparam = float(kwargs["regparam"])
else:
self.regparam = 1.
self.svals = self.svdad.svals
self.svecs = self.svdad.rsvecs
self.results = {}
def loadResources(self):
Y = self.resource_pool[data_sources.TRAIN_LABELS]
self.label_row_inds = array(self.resource_pool["label_row_inds"], dtype=int32)
self.label_col_inds = array(self.resource_pool["label_col_inds"], dtype=int32)
Y = array_tools.as_labelmatrix(Y)
self.Y = Y
self.trained = False
if self.resource_pool.has_key(data_sources.CALLBACK_FUNCTION):
self.callbackfun = self.resource_pool[data_sources.CALLBACK_FUNCTION]
else:
self.callbackfun = None
def sqerror(Y, P):
"""Mean squared error.
A performance measure for regression problems. Computes the sum of (Y[i]-P[i])**2
over all index pairs, normalized by the number of instances.
If 2-dimensional arrays are supplied as arguments, then error is separately computed for
each column, after which the errors are averaged.
Parameters
----------
Y: {array-like}, shape = [n_samples] or [n_samples, n_tasks]
Correct utility values, can be any real numbers
P: {array-like}, shape = [n_samples] or [n_samples, n_tasks]
Predicted utility values, can be any real numbers.
Returns
-------
error: float
"""
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
return np.mean(sqerror_multitask(Y,P))
def sqerror(Y, P):
"""Mean squared error.
A performance measure for regression problems. Computes the sum of (Y[i]-P[i])**2
over all index pairs, normalized by the number of instances.
If 2-dimensional arrays are supplied as arguments, then error is separately computed for
each column, after which the errors are averaged.
Parameters
----------
Y: {array-like}, shape = [n_samples] or [n_samples, n_tasks]
Correct utility values, can be any real numbers
P: {array-like}, shape = [n_samples] or [n_samples, n_tasks]
Predicted utility values, can be any real numbers.
Returns
-------
error: float
"""
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
return np.mean(sqerror_multitask(Y, P))
def sqmprank(Y, P):
"""Squared magnitude preserving ranking error.
A performance measure for ranking problems. Computes the sum of (Y[i]-Y[j]-P[i]+P[j])**2
over all index pairs. normalized by the number of pairs. For query-structured data,
one would typically want to compute the error separately for each query, and average.
If 2-dimensional arrays are supplied as arguments, then error is separately computed for
each column, after which the errors are averaged.
Parameters
----------
Y: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Correct utility values, can be any real numbers
P: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Predicted utility values, can be any real numbers.
Returns
-------
error: float
"""
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
return np.mean(sqmprank_multitask(Y, P))
def disagreement(Y, P):
"""Disagreement error, also known as the pairwise ranking error.
A performance measure for ranking problems. Computes the number
of pairwise disagreements between the correct and predicted rankings.
An O(n^2)-time implementation, can be slow for large problems (loglinear
time implementation would be possible using search trees). For query-structured
data, one would typically want to compute the disagreement separately for each query,
and average.
If 2-dimensional arrays are supplied as arguments, then disagreement
is separately computed for each column, after which the disagreements
are averaged.
Parameters
----------
Y: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Correct utility values, can be any real numbers
P: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Predicted utility values, can be any real numbers.
Returns
-------
disagreement: float
number between 0 and 1
"""
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
perfs = disagreement_multitask(Y, P)
perfs = np.array(perfs)
perfs = perfs[np.invert(np.isnan(perfs))]
if len(perfs) == 0:
raise UndefinedPerformance(
"No pairs, all the instances have the same label")
perf = np.mean(perfs)
return perf
def sqmprank(Y, P):
"""Squared magnitude preserving ranking error.
A performance measure for ranking problems. Computes the sum of (Y[i]-Y[j]-P[i]+P[j])**2
over all index pairs. normalized by the number of pairs. For query-structured data,
one would typically want to compute the error separately for each query, and average.
If 2-dimensional arrays are supplied as arguments, then error is separately computed for
each column, after which the errors are averaged.
Parameters
----------
Y: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Correct utility values, can be any real numbers
P: {array-like}, shape = [n_samples] or [n_samples, n_labels]
Predicted utility values, can be any real numbers.
Returns
-------
error: float
"""
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
return np.mean(sqmprank_multitask(Y, P))
def __init__(self, **kwargs):
self.resource_pool = kwargs
Y = kwargs[TRAIN_LABELS]
self.label_row_inds = np.array(kwargs["label_row_inds"], dtype = np.int32)
self.label_col_inds = np.array(kwargs["label_col_inds"], dtype = np.int32)
Y = array_tools.as_labelmatrix(Y)
self.Y = Y
self.trained = False
if kwargs.has_key("regparam"):
self.regparam = kwargs["regparam"]
else:
self.regparam = 0.
if kwargs.has_key(CALLBACK_FUNCTION):
self.callbackfun = kwargs[CALLBACK_FUNCTION]
else:
self.callbackfun = None
def __init__(self, **kwargs):
Y = kwargs["train_labels"]
Y = array_tools.as_labelmatrix(Y)
self.Y = Y
if kwargs.has_key('kmatrix1'):
K1 = mat(kwargs['kmatrix1'])
K2 = mat(kwargs['kmatrix2'])
self.K1, self.K2 = K1, K2
self.kernelmode = True
else:
X1 = mat(kwargs['xmatrix1'])
X2 = mat(kwargs['xmatrix2'])
self.X1, self.X2 = X1, X2
self.kernelmode = False
self.regparam = kwargs["regparam"]
self.trained = False
def __init__(self, train_features, train_labels, validation_features=None, validation_labels=None, regparam=1.0, bias=1.0):
X = train_features
self.Y = array_tools.as_labelmatrix(train_labels)
self.X = csc_matrix(X.T)
self.bias = bias
self.regparam = regparam
if self.bias != 0.:
bias_slice = sqrt(self.bias)*np.mat(ones((1,self.X.shape[1]),dtype=np.float64))
self.X = sparse.vstack([self.X,bias_slice]).tocsc()
else:
self.bias = 0.
self.X_csr = self.X.tocsr()
if validation_features != None and validation_labels != None:
self.callbackfun = EarlyStopCB(validation_features, validation_labels)
else:
self.callbackfun = None
self.results = {}
def __init__(self, **kwargs):
self.resource_pool = kwargs
Y = kwargs[TRAIN_LABELS]
self.label_row_inds = np.array(kwargs["label_row_inds"],
dtype=np.int32)
self.label_col_inds = np.array(kwargs["label_col_inds"],
dtype=np.int32)
Y = array_tools.as_labelmatrix(Y)
self.Y = Y
self.trained = False
if kwargs.has_key("regparam"):
self.regparam = kwargs["regparam"]
else:
self.regparam = 0.
if kwargs.has_key(CALLBACK_FUNCTION):
self.callbackfun = kwargs[CALLBACK_FUNCTION]
else:
self.callbackfun = None
def __init__(self, **kwargs):
super(GreedyRLS, self).__init__(**kwargs)
self.regparam = float(kwargs["regparam"])
X = kwargs["train_features"]
if isinstance(X, sp.base.spmatrix):
self.X = X.todense()
else:
self.X = X
self.X = self.X.T
self.Y = kwargs["train_labels"]
self.Y = array_tools.as_labelmatrix(self.Y)
# Number of training examples
self.size = self.Y.shape[0]
# if not self.Y.shape[1] == 1:
# raise Exception('GreedyRLS currently supports only one output at a time. The output matrix is now of shape ' + str(self.Y.shape) + '.')
if kwargs.has_key("bias"):
self.bias = float(kwargs["bias"])
else:
self.bias = 0.0
if kwargs.has_key("measure"):
self.measure = kwargs["measure"]
else:
self.measure = None
tsize = self.size
fsize = X.shape[1]
if not kwargs.has_key("subsetsize"):
raise Exception("Parameter 'subsetsize' must be given.")
self.desiredfcount = int(kwargs["subsetsize"])
if not fsize >= self.desiredfcount:
raise Exception(
"The overall number of features "
+ str(fsize)
+ " is smaller than the desired number "
+ str(self.desiredfcount)
+ " of features to be selected."
)
self.results = {}
if "use_default_callback" in kwargs and bool(kwargs["use_default_callback"]):
self.callbackfun = DefaultCallback(**kwargs)
def __init__(self, **kwargs):
super(CGRankRLS, self).__init__(**kwargs)
if kwargs.has_key("regparam"):
self.regparam = float(kwargs["regparam"])
else:
self.regparam = 0.
if 'train_labels' in kwargs:
Y = kwargs['train_labels']
self.Y = array_tools.as_labelmatrix(Y)
#Number of training examples
self.size = Y.shape[0]
if self.Y.shape[1] > 1:
raise Exception(
'CGRankRLS does not currently work in multi-label mode')
self.learn_from_labels = True
if ('validation_features' in kwargs) and ('validation_labels'
in kwargs):
validation_X = kwargs['validation_features']
validation_Y = kwargs['validation_labels']
if 'validation_qids' in kwargs:
validation_qids = kwargs['validation_qids']
else:
validation_qids = None
self.callbackfun = EarlyStopCB(validation_X, validation_Y,
validation_qids)
elif 'train_preferences' in kwargs:
self.pairs = kwargs['train_preferences']
self.learn_from_labels = False
else:
raise Exception('Neither labels nor preference information found')
X = kwargs['train_features']
self.X = csc_matrix(X.T)
self.bias = 0.
if 'train_qids' in kwargs:
qids = kwargs['train_qids']
self.setQids(qids)
else:
self.qidmap = None
self.results = {}
def __init__(self, **kwargs):
super(GreedyRLS, self).__init__(**kwargs)
self.regparam = float(kwargs['regparam'])
X = kwargs['train_features']
if isinstance(X, sp.base.spmatrix):
self.X = X.todense()
else:
self.X = X
self.X = self.X.T
self.Y = kwargs['train_labels']
self.Y = array_tools.as_labelmatrix(self.Y)
#Number of training examples
self.size = self.Y.shape[0]
#if not self.Y.shape[1] == 1:
# raise Exception('GreedyRLS currently supports only one output at a time. The output matrix is now of shape ' + str(self.Y.shape) + '.')
if kwargs.has_key('bias'):
self.bias = float(kwargs['bias'])
else:
self.bias = 0.
if kwargs.has_key('measure'):
self.measure = kwargs['measure']
else:
self.measure = None
tsize = self.size
fsize = X.shape[1]
if not kwargs.has_key('subsetsize'):
raise Exception("Parameter 'subsetsize' must be given.")
self.desiredfcount = int(kwargs['subsetsize'])
if not fsize >= self.desiredfcount:
raise Exception('The overall number of features ' + str(fsize) +
' is smaller than the desired number ' +
str(self.desiredfcount) +
' of features to be selected.')
self.results = {}
if 'use_default_callback' in kwargs and bool(
kwargs['use_default_callback']):
self.callbackfun = DefaultCallback(**kwargs)
def loadResources(self):
AbstractIterativeLearner.loadResources(self)
if data_sources.TRAIN_LABELS in self.resource_pool:
Y = self.resource_pool[data_sources.TRAIN_LABELS]
self.Y = array_tools.as_labelmatrix(Y)
#Number of training examples
self.size = Y.shape[0]
if Y.shape[1] > 1:
raise Exception(
'CGRankRLS does not currently work in multi-label mode')
self.learn_from_labels = True
if (data_sources.VALIDATION_FEATURES
in self.resource_pool) and (data_sources.VALIDATION_LABELS
in self.resource_pool):
validation_X = self.resource_pool[
data_sources.VALIDATION_FEATURES]
validation_Y = self.resource_pool[
data_sources.VALIDATION_LABELS]
if data_sources.VALIDATION_QIDS in self.resource_pool:
validation_qids = self.resource_pool[
data_sources.VALIDATION_QIDS]
else:
validation_qids = None
self.callbackfun = EarlyStopCB(validation_X, validation_Y,
validation_qids)
elif data_sources.TRAIN_PREFERENCES in self.resource_pool:
self.pairs = self.resource_pool[data_sources.TRAIN_PREFERENCES]
self.learn_from_labels = False
else:
raise Exception('Neither labels nor preference information found')
X = self.resource_pool[data_sources.TRAIN_FEATURES]
self.X = csc_matrix(X.T)
self.bias = 0.
if data_sources.TRAIN_QIDS in self.resource_pool:
qids = self.resource_pool[data_sources.TRAIN_QIDS]
self.setQids(qids)
self.results = {}
def __init__(self, **kwargs):
super(CGRankRLS, self).__init__(**kwargs)
if kwargs.has_key("regparam"):
self.regparam = float(kwargs["regparam"])
else:
self.regparam = 0.
if 'train_labels' in kwargs:
Y = kwargs['train_labels']
self.Y = array_tools.as_labelmatrix(Y)
#Number of training examples
self.size = Y.shape[0]
if self.Y.shape[1] > 1:
raise Exception('CGRankRLS does not currently work in multi-label mode')
self.learn_from_labels = True
if ('validation_features' in kwargs) and ('validation_labels' in kwargs):
validation_X = kwargs['validation_features']
validation_Y = kwargs['validation_labels']
if 'validation_qids' in kwargs:
validation_qids = kwargs['validation_qids']
else:
validation_qids = None
self.callbackfun = EarlyStopCB(validation_X, validation_Y, validation_qids)
elif 'train_preferences' in kwargs:
self.pairs = kwargs['train_preferences']
self.learn_from_labels = False
else:
raise Exception('Neither labels nor preference information found')
X = kwargs['train_features']
self.X = csc_matrix(X.T)
self.bias = 0.
if 'train_qids' in kwargs:
qids = kwargs['train_qids']
self.setQids(qids)
else:
self.qidmap = None
self.results = {}
def loadResources(self):
Y = self.resource_pool[data_sources.TRAIN_LABELS]
Y = array_tools.as_labelmatrix(Y)
self.Y = Y
self.trained = False
def __init__(self, **kwargs):
super(AbstractSupervisedLearner, self).__init__(**kwargs)
Y = kwargs['train_labels']
self.Y = array_tools.as_labelmatrix(Y)
self.size = self.Y.shape[0]
self.ysize = self.Y.shape[1]
def setLabels(self, Y):
self.Y = array_tools.as_labelmatrix(Y)
self.size = self.Y.shape[0]
self.ysize = self.Y.shape[1]
def __init__(self,
svdad,
number_of_clusters=2,
regparam=1.0,
train_labels=None,
fixed_indices=None,
callback_obj=None):
self.labelcount = number_of_clusters
self.svdad = svdad
self.regparam = regparam
self.svals = svdad.svals
self.svecs = svdad.rsvecs
self.constraint = 0
if self.labelcount == 2:
self.oneclass = True
else:
self.oneclass = False
#if not self.resource_pool.has_key('number_of_clusters'):
# raise Exception("Parameter 'number_of_clusters' must be given.")
self.labelcount = number_of_clusters
self.callbackfun = callback_obj
if train_labels != None:
Y_orig = array_tools.as_labelmatrix(train_labels)
if Y_orig.shape[1] == 1:
self.Y = mat(zeros((Y_orig.shape[0], 2)))
self.Y[:, 0] = Y_orig
self.Y[:, 1] = -Y_orig
self.oneclass = True
else:
self.Y = Y_orig.copy()
self.oneclass = False
for i in range(self.Y.shape[0]):
largestind = 0
largestval = self.Y[i, 0]
for j in range(self.Y.shape[1]):
if self.Y[i, j] > largestval:
largestind = j
largestval = self.Y[i, j]
self.Y[i, j] = -1.
self.Y[i, largestind] = 1.
else:
size = self.svecs.shape[0]
ysize = self.labelcount
if self.labelcount == None: self.labelcount = 2
self.Y = RandomLabelSource(size, ysize).readLabels()
self.size = self.Y.shape[0]
self.labelcount = self.Y.shape[1]
self.classvec = -mat(ones((self.size, 1), dtype=int32))
self.classcounts = mat(zeros((self.labelcount, 1), dtype=int32))
for i in range(self.size):
clazzind = 0
largestlabel = self.Y[i, 0]
for j in range(self.labelcount):
if self.Y[i, j] > largestlabel:
largestlabel = self.Y[i, j]
clazzind = j
self.classvec[i] = clazzind
self.classcounts[clazzind] = self.classcounts[clazzind] + 1
self.svecs_list = []
for i in range(self.size):
self.svecs_list.append(self.svecs[i].T)
self.fixedindices = []
if fixed_indices != None:
self.fixedindices = fixed_indices
self.results = {}
def spearman(Y, P):
Y = array_tools.as_labelmatrix(Y)
P = array_tools.as_labelmatrix(P)
return np.mean(spearman_multitask(Y, P))
def setLabels(self, Y):
self.Y = array_tools.as_labelmatrix(Y)
self.size = self.Y.shape[0]
self.ysize = self.Y.shape[1]
def __init__(self, **kwargs):
super(AbstractSupervisedLearner, self).__init__(**kwargs)
Y = kwargs['train_labels']
self.Y = array_tools.as_labelmatrix(Y)
self.size = self.Y.shape[0]
self.ysize = self.Y.shape[1]
