def getRpRnTpTnForTrain0OrVal1(self, y, training0OrValidation1):
# The returned list has (numberOfClasses)x4 integers: >numberOfRealPositives, numberOfRealNegatives, numberOfTruePredictedPositives, numberOfTruePredictedNegatives< for each class (incl background).
# Order in the list is the natural order of the classes (ie class-0 RP,RN,TPP,TPN, class-1 RP,RN,TPP,TPN, class-2 RP,RN,TPP,TPN ...)
# param y: y = T.itensor4('y'). Dimensions [batchSize, r, c, z]
yPredToUse = self.y_pred_train if training0OrValidation1 == 0 else self.y_pred_val
checkDimsOfYpredAndYEqual(
y, yPredToUse,
"training" if training0OrValidation1 == 0 else "validation")
returnedListWithNumberOfRpRnTpTnForEachClass = []
for class_i in xrange(0, self._numberOfOutputClasses):
#Number of Real Positive, Real Negatives, True Predicted Positives and True Predicted Negatives are reported PER CLASS (first for WHOLE).
tensorOneAtRealPos = T.eq(y, class_i)
tensorOneAtRealNeg = T.neq(y, class_i)
tensorOneAtPredictedPos = T.eq(yPredToUse, class_i)
tensorOneAtPredictedNeg = T.neq(yPredToUse, class_i)
tensorOneAtTruePos = T.and_(tensorOneAtRealPos,
tensorOneAtPredictedPos)
tensorOneAtTrueNeg = T.and_(tensorOneAtRealNeg,
tensorOneAtPredictedNeg)
returnedListWithNumberOfRpRnTpTnForEachClass.append(
T.sum(tensorOneAtRealPos))
returnedListWithNumberOfRpRnTpTnForEachClass.append(
T.sum(tensorOneAtRealNeg))
returnedListWithNumberOfRpRnTpTnForEachClass.append(
T.sum(tensorOneAtTruePos))
returnedListWithNumberOfRpRnTpTnForEachClass.append(
T.sum(tensorOneAtTrueNeg))
return returnedListWithNumberOfRpRnTpTnForEachClass
def getRpRnTpTnForTrain0OrVal1(self, y, training0OrValidation1):
# The returned list has (numberOfClasses)x4 integers: >numberOfRealPositives, numberOfRealNegatives, numberOfTruePredictedPositives, numberOfTruePredictedNegatives< for each class (incl background).
# Order in the list is the natural order of the classes (ie class-0 RP,RN,TPP,TPN, class-1 RP,RN,TPP,TPN, class-2 RP,RN,TPP,TPN ...)
# param y: y = T.itensor4('y'). Dimensions [batchSize, r, c, z]
yPredToUse = self.y_pred_train if training0OrValidation1 == 0 else self.y_pred_val
checkDimsOfYpredAndYEqual(y, yPredToUse, "training" if training0OrValidation1 == 0 else "validation")
returnedListWithNumberOfRpRnTpTnForEachClass = []
for class_i in xrange(0, self._numberOfOutputClasses) :
#Number of Real Positive, Real Negatives, True Predicted Positives and True Predicted Negatives are reported PER CLASS (first for WHOLE).
tensorOneAtRealPos = T.eq(y, class_i)
tensorOneAtRealNeg = T.neq(y, class_i)
tensorOneAtPredictedPos = T.eq(yPredToUse, class_i)
tensorOneAtPredictedNeg = T.neq(yPredToUse, class_i)
tensorOneAtTruePos = T.and_(tensorOneAtRealPos,tensorOneAtPredictedPos)
tensorOneAtTrueNeg = T.and_(tensorOneAtRealNeg,tensorOneAtPredictedNeg)
returnedListWithNumberOfRpRnTpTnForEachClass.append( T.sum(tensorOneAtRealPos) )
returnedListWithNumberOfRpRnTpTnForEachClass.append( T.sum(tensorOneAtRealNeg) )
returnedListWithNumberOfRpRnTpTnForEachClass.append( T.sum(tensorOneAtTruePos) )
returnedListWithNumberOfRpRnTpTnForEachClass.append( T.sum(tensorOneAtTrueNeg) )
return returnedListWithNumberOfRpRnTpTnForEachClass
def realPosAndNegAndTruePredPosNegTraining0OrValidation1(
self, y, training0OrValidation1):
#***Implemented only for binary***. For multiclass, it counts real-positives as everything not-background, and as true positives the true predicted lesion (ind of class).
vectorOneAtRealPositives = T.gt(y, 0)
vectorOneAtRealNegatives = T.eq(y, 0)
if training0OrValidation1 == 0: #training:
yPredToUse = self.y_pred
else: #validation
yPredToUse = self.y_pred_inference
vectorOneAtPredictedPositives = T.gt(yPredToUse, 0)
vectorOneAtPredictedNegatives = T.eq(yPredToUse, 0)
vectorOneAtTruePredictedPositives = T.and_(
vectorOneAtRealPositives, vectorOneAtPredictedPositives)
vectorOneAtTruePredictedNegatives = T.and_(
vectorOneAtRealNegatives, vectorOneAtPredictedNegatives)
numberOfRealPositives = T.sum(vectorOneAtRealPositives)
numberOfRealNegatives = T.sum(vectorOneAtRealNegatives)
numberOfTruePredictedPositives = T.sum(
vectorOneAtTruePredictedPositives)
numberOfTruePredictedNegatives = T.sum(
vectorOneAtTruePredictedNegatives)
return [
numberOfRealPositives, numberOfRealNegatives,
numberOfTruePredictedPositives, numberOfTruePredictedNegatives
]
def ber(self, y):
tp = T.and_(T.eq(y, 1), T.eq(self.y_pred, 1)).sum()
tn = T.and_(T.eq(y, 0), T.eq(self.y_pred, 0)).sum()
fp = T.and_(T.eq(y, 0), T.eq(self.y_pred, 1)).sum()
fn = T.and_(T.eq(y, 1), T.eq(self.y_pred, 0)).sum()
ber = 0.5 * (T.true_div(fp, tp + fp) + T.true_div(fn, tn + fn))
return ber
def multiclassRealPosAndNegAndTruePredPosNegTraining0OrValidation1(self, y, training0OrValidation1): """ The returned list has (numberOfClasses)x4 integers: >numberOfRealPositives, numberOfRealNegatives, numberOfTruePredictedPositives, numberOfTruePredictedNegatives< for each class (incl background). Order in the list is the natural order of the classes (ie class-0 RP,RN,TPP,TPN, class-1 RP,RN,TPP,TPN, class-2 RP,RN,TPP,TPN ...) """ returnedListWithNumberOfRpRnPpPnForEachClass = [] for class_i in xrange(0, self.numberOfOutputClasses) : #Number of Real Positive, Real Negatives, True Predicted Positives and True Predicted Negatives are reported PER CLASS (first for WHOLE). vectorOneAtRealPositives = T.eq(y, class_i) vectorOneAtRealNegatives = T.neq(y, class_i) if training0OrValidation1 == 0 : #training: yPredToUse = self.y_pred else: #validation yPredToUse = self.y_pred_inference vectorOneAtPredictedPositives = T.eq(yPredToUse, class_i) vectorOneAtPredictedNegatives = T.neq(yPredToUse, class_i) vectorOneAtTruePredictedPositives = T.and_(vectorOneAtRealPositives,vectorOneAtPredictedPositives) vectorOneAtTruePredictedNegatives = T.and_(vectorOneAtRealNegatives,vectorOneAtPredictedNegatives) returnedListWithNumberOfRpRnPpPnForEachClass.append( T.sum(vectorOneAtRealPositives) ) returnedListWithNumberOfRpRnPpPnForEachClass.append( T.sum(vectorOneAtRealNegatives) ) returnedListWithNumberOfRpRnPpPnForEachClass.append( T.sum(vectorOneAtTruePredictedPositives) ) returnedListWithNumberOfRpRnPpPnForEachClass.append( T.sum(vectorOneAtTruePredictedNegatives) ) return returnedListWithNumberOfRpRnPpPnForEachClass
def incomplete_beta(a, b, value):
'''Incomplete beta implementation
Power series and continued fraction expansions chosen for best numerical
convergence across the board based on inputs.
'''
machep = tt.constant(np.MachAr().eps, dtype='float64')
one = tt.constant(1, dtype='float64')
w = one - value
ps = incomplete_beta_ps(a, b, value)
flip = tt.gt(value, (a / (a + b)))
aa, bb = a, b
a = tt.switch(flip, bb, aa)
b = tt.switch(flip, aa, bb)
xc = tt.switch(flip, value, w)
x = tt.switch(flip, w, value)
tps = incomplete_beta_ps(a, b, x)
tps = tt.switch(tt.le(tps, machep), one - machep, one - tps)
# Choose which continued fraction expansion for best convergence.
small = tt.lt(x * (a + b - 2.0) - (a - one), 0.0)
cfe = incomplete_beta_cfe(a, b, x, small)
w = tt.switch(small, cfe, cfe / xc)
# Direct incomplete beta accounting for flipped a, b.
t = tt.exp(a * tt.log(x) + b * tt.log(xc) + gammaln(a + b) - gammaln(a) -
gammaln(b) + tt.log(w / a))
t = tt.switch(flip, tt.switch(tt.le(t, machep), one - machep, one - t), t)
return tt.switch(
tt.and_(flip, tt.and_(tt.le((b * x), one), tt.le(x, 0.95))), tps,
tt.switch(tt.and_(tt.le(b * value, one), tt.le(value, 0.95)), ps, t))
def depth_grad(r, b):
# depth = 1 - s0 / pi; where s0 is from Agol+
b = tt.abs_(b)
r = tt.abs_(r)
b2 = b**2
opr = 1 + r
omr = 1 - r
rmo = r - 1
# Case 2
a = kite_area(r, b)
twor = 2 * r
twoa = 2 * a
k0 = tt.arctan2(twoa, rmo * opr + b2)
dr = twor * k0 / np.pi
db = -twoa / (b * np.pi)
zero = tt.zeros_like(r)
return (
tt.switch(
tt.le(opr, b),
zero,
tt.switch(
tt.and_(tt.lt(tt.abs_(omr), b), tt.lt(b, opr)),
dr,
tt.switch(tt.le(b, omr), twor, zero),
),
),
tt.switch(
tt.le(opr, b),
zero,
tt.switch(tt.and_(tt.lt(tt.abs_(omr), b), tt.lt(b, opr)), db,
zero),
),
)
def one_run(my_x, my_y, my_z,
my_u, my_v, my_w,
my_weight,
my_heat, my_albedo, my_microns_per_shell):
# move
random = rng.uniform(low=0.00003, high=1.)
t = -T.log(random)
x_moved = my_x + my_u*t
y_moved = my_y + my_v*t
z_moved = my_z + my_w*t
# absorb
shell = T.cast(T.sqrt(T.sqr(x_moved) + T.sqr(y_moved) + T.sqr(z_moved))
* my_microns_per_shell, 'int32')
shell = T.clip(shell, 0, SHELL_MAX-1)
new_weight = my_weight * my_albedo
# new direction
xi1 = rng.uniform(low=-1., high=1.)
xi2 = rng.uniform(low=-1., high=1.)
xi_norm = T.sqrt(T.sqr(xi1) + T.sqr(xi2))
t_xi = rng.uniform(low=0.000000001, high=1.)
# rescale xi12 to fit t_xi as norm
xi1 = xi1/xi_norm * T.sqr(t_xi)
xi2 = xi2/xi_norm * T.sqr(t_xi)
u_new_direction = 2. * t_xi - 1.
v_new_direction = xi1 * T.sqrt((1. - T.sqr(u_new_direction)) / t_xi)
w_new_direction = xi2 * T.sqrt((1. - T.sqr(u_new_direction)) / t_xi)
# roulette
weight_for_starting_roulette = 0.001
CHANCE = 0.1
partakes_roulette = T.switch(T.lt(new_weight, weight_for_starting_roulette),
1,
0)
roulette = rng.uniform(low=0., high=1.)
loses_roulette = T.gt(roulette, CHANCE)
# if roulette decides to terminate the photon: set weight to 0
weight_after_roulette = ifelse(T.and_(partakes_roulette, loses_roulette),
0.,
new_weight)
# if partakes in roulette but does not get terminated
weight_after_roulette = ifelse(T.and_(partakes_roulette, T.invert(loses_roulette)),
weight_after_roulette / CHANCE,
weight_after_roulette)
new_heat = (1.0 - my_albedo) * my_weight
heat_i = my_heat[shell]
return (x_moved, y_moved, z_moved,\
u_new_direction, v_new_direction, w_new_direction,\
weight_after_roulette),\
OrderedDict({my_heat: T.inc_subtensor(heat_i, new_heat)})
def confusion_matrix(self, y):
"""
Returns confusion matrix
"""
tp = T.and_(T.eq(y, 1), T.eq(self.y_pred, 1)).sum()
tn = T.and_(T.eq(y, 0), T.eq(self.y_pred, 0)).sum()
fp = T.and_(T.eq(y, 0), T.eq(self.y_pred, 1)).sum()
fn = T.and_(T.eq(y, 1), T.eq(self.y_pred, 0)).sum()
return [tp, tn, fp, fn]
def in_transit(self, t, r=0.0, texp=None):
"""Get a list of timestamps that are in transit
Args:
t (vector): A vector of timestamps to be evaluated.
r (Optional): The radii of the planets.
texp (Optional[float]): The exposure time.
Returns:
The indices of the timestamps that are in transit.
"""
z = tt.zeros_like(self.a)
r = tt.as_tensor_variable(r) + z
R = self.r_star + z
# Wrap the times into time since transit
hp = 0.5 * self.period
dt = tt.mod(self._warp_times(t) - self.t0 + hp, self.period) - hp
if self.ecc is None:
# Equation 14 from Winn (2010)
k = r / self.r_star
arg = tt.square(1 + k) - tt.square(self.b)
hdur = hp * tt.arcsin(self.r_star / self.a *
tt.sqrt(arg) / self.sin_incl) / np.pi
t_start = -hdur
t_end = hdur
flag = z
else:
M_contact = self.contact_points_op(
self.a, self.ecc, self.cos_omega, self.sin_omega,
self.cos_incl + z, self.sin_incl + z, R + r)
flag = M_contact[2]
t_start = (M_contact[0] - self.M0) / self.n
t_start = tt.mod(t_start + hp, self.period) - hp
t_end = (M_contact[1] - self.M0) / self.n
t_end = tt.mod(t_end + hp, self.period) - hp
if texp is not None:
t_start -= 0.5*texp
t_end += 0.5*texp
mask = tt.any(tt.and_(dt >= t_start, dt <= t_end), axis=-1)
result = ifelse(tt.and_(tt.all(tt.eq(flag, 0)),
tt.all(tt.gt(t_end, t_start))),
tt.arange(t.size)[mask],
tt.arange(t.size))
return result
def errorReport(self, y, n):
# compute error rate by class
# check if y has same dimension of y_pred
if y.ndim != self.y_pred.ndim:
raise TypeError('y should have the same shape as self.y_pred',
('y', target.type, 'y_pred', self.y_pred.type))
# check if y is of the correct datatype
if y.dtype.startswith('int'):
c = numpy.zeros((self.n_out, self.n_out + 1), dtype=numpy.int64)
counts = T.as_tensor_variable(c)
classVector = numpy.zeros(n)
for i in xrange(self.n_out):
othersVector = numpy.zeros(n)
for j in xrange(self.n_out):
counts = theano.tensor.basic.set_subtensor(
counts[i, j],
T.sum(T.and_(T.eq(self.y_pred, othersVector),
T.eq(y, classVector))))
othersVector = othersVector + 1
counts = theano.tensor.basic.set_subtensor(
counts[i, self.n_out],
T.sum(T.eq(y, classVector)))
classVector = classVector + 1
return counts
else:
raise NotImplementedError()
def errorReport(self, y, n):
# compute error rate by class
# check if y has same dimension of y_pred
if y.ndim != self.y_pred.ndim:
raise TypeError('y should have the same shape as self.y_pred',
('y', target.type, 'y_pred', self.y_pred.type))
# check if y is of the correct datatype
if y.dtype.startswith('int'):
c = numpy.zeros((self.n_out, self.n_out + 1), dtype=numpy.int64)
counts = T.as_tensor_variable(c)
classVector = numpy.zeros(n)
for i in xrange(self.n_out):
othersVector = numpy.zeros(n)
for j in xrange(self.n_out):
counts = theano.tensor.basic.set_subtensor(
counts[i, j],
T.sum(
T.and_(T.eq(self.y_pred, othersVector),
T.eq(y, classVector))))
othersVector = othersVector + 1
counts = theano.tensor.basic.set_subtensor(
counts[i, self.n_out], T.sum(T.eq(y, classVector)))
classVector = classVector + 1
return counts
else:
raise NotImplementedError()
def FPR(self, y):
"""Return a float representing the number of errors in the minibatch
over the total number of examples of the minibatch ; zero one
loss over the size of the minibatch
:type y: theano.tensor.TensorType
:param y: corresponds to a vector that gives for each example the
correct label
"""
# check if y has same dimension of y_pred
if y.ndim != self.y_pred.ndim:
raise TypeError(
'y should have the same shape as self.y_pred',
('y', y.type, 'y_pred', self.y_pred.type)
)
# check if y is of the correct datatype
if y.dtype.startswith('int'):
# the T.neq operator returns a vector of 0s and 1s, where 1
# represents a mistake in prediction
zeros = T.zeros_like(y)
ones = T.ones_like(y)
N = T.eq(y, zeros)
P = T.eq(y, ones)
FP = T.and_(N, T.eq(ones, self.y_pred))
return T.mean(FP)/T.mean(N)
else:
raise NotImplementedError()
def depth(r, b):
# depth = 1 - s0 / pi; where s0 is from Agol+
b = tt.abs_(b)
r = tt.abs_(r)
b2 = b ** 2
r2 = r ** 2
opr = 1 + r
omr = 1 - r
rmo = r - 1
# Case 2
a = kite_area(r, b)
twoa = 2 * a
k0 = tt.arctan2(twoa, rmo * opr + b2)
k1 = tt.arctan2(twoa, omr * opr + b2)
case2 = (k1 + r2 * k0 - a) / np.pi
return tt.switch(
tt.le(opr, b),
tt.zeros_like(r),
tt.switch(
tt.and_(tt.lt(tt.abs_(omr), b), tt.lt(b, opr)),
case2,
tt.switch(tt.le(b, omr), r2, tt.ones_like(r)),
),
)
def theano_digitize(x, bins):
"""
Equivalent to numpy digitize.
Parameters
----------
x : Theano tensor or array_like
The array or matrix to be digitized
bins : array_like
The bins with which x should be digitized
Returns
-------
A Theano tensor
The indices of the bins to which each value in input array belongs.
"""
binned = T.zeros_like(x) + len(bins)
for i in range(len(bins)):
bin = bins[i]
if i == 0:
binned = T.switch(T.lt(x, bin), i, binned)
else:
ineq = T.and_(T.ge(x, bins[i - 1]), T.lt(x, bin))
binned = T.switch(ineq, i, binned)
binned = T.switch(T.isnan(x), len(bins), binned)
return binned
def theano_digitize(x, bins):
"""
Equivalent to numpy digitize.
Parameters
----------
x : Theano tensor or array_like
The array or matrix to be digitized
bins : array_like
The bins with which x should be digitized
Returns
-------
A Theano tensor
The indices of the bins to which each value in input array belongs.
"""
binned = T.zeros_like(x) + len(bins)
for i in range(len(bins)):
bin=bins[i]
if i == 0:
binned=T.switch(T.lt(x,bin),i,binned)
else:
ineq = T.and_(T.ge(x,bins[i-1]),T.lt(x,bin))
binned=T.switch(ineq,i,binned)
binned=T.switch(T.isnan(x), len(bins), binned)
return binned
def logp_loss3(self, x, y, fake_label,neg_label, pos_ratio = 0.5): #adopt maxout for negative # pos_rati0 means pos examples weight (0.5 means equal 1:1) print "adopt positives weight ............. "+str(pos_ratio) y = y.dimshuffle((1,0)) inx = x.dimshuffle((1,0)) fake_mask = T.neq(y, fake_label) y = y*fake_mask pos_mask = T.and_(fake_mask, T.le(y, neg_label-1))*pos_ratio neg_mask = T.ge(y, neg_label)*(1- pos_ratio) pos_score, neg_score = self.structure2(inx,False) maxneg = T.max(neg_score, axis = -1) scores = T.concatenate((pos_score, maxneg.dimshuffle((0,1,'x'))), axis = 2) d3shape = scores.shape #seq*batch , label scores = scores.reshape((d3shape[0]*d3shape[1], d3shape[2])) pro = T.nnet.softmax(scores) _logp = T.nnet.categorical_crossentropy(pro, y.flatten()) _logp = _logp.reshape(fake_mask.shape) loss = (T.sum(_logp*pos_mask)+ T.sum(_logp*neg_mask))/ (T.sum(pos_mask)+T.sum(neg_mask)) pos_loss = T.sum(_logp*pos_mask) neg_loss = T.sum(_logp*neg_mask) return loss, pos_loss, neg_loss
def asimov_errors(self, y):
# check if y has same dimension of y_pred
if y.ndim != self.logRegressionLayer.y_pred.ndim:
raise TypeError(
'y should have the same shape as self.y_pred',
('y', y.type, 'y_pred', self.y_pred.type)
)
# check if y is of the correct datatype
if y.dtype.startswith('int'):
S = T.sum(T.eq(y,1))
B = T.sum(T.eq(y,0))#*10000 # TODO: cross-section scaling
s = T.sum(T.and_(T.eq(y,1),T.eq(self.logRegressionLayer.y_pred,1)))
b = T.sum(T.and_(T.eq(y,0),T.eq(self.logRegressionLayer.y_pred,1)))#*10000 TODO: cross-section scaling
return(S,B,s,b)
# represents a mistake in prediction
else:
raise NotImplementedError()
def call(self, inputs):
real = get_realpart(inputs)
imag = get_imagpart(inputs)
cond = T.and_(real >= 0, imag >= 0)
x = T.where(cond, real, self.zeros)
y = T.where(cond, imag, self.zeros)
return K.concatenate((x, y), axis=-1)
def incomplete_beta(a, b, value):
'''Incomplete beta implementation
Power series and continued fraction expansions chosen for best numerical
convergence across the board based on inputs.
'''
machep = tt.constant(np.MachAr().eps, dtype='float64')
one = tt.constant(1, dtype='float64')
w = one - value
ps = incomplete_beta_ps(a, b, value)
flip = tt.gt(value, (a / (a + b)))
aa, bb = a, b
a = tt.switch(flip, bb, aa)
b = tt.switch(flip, aa, bb)
xc = tt.switch(flip, value, w)
x = tt.switch(flip, w, value)
tps = incomplete_beta_ps(a, b, x)
tps = tt.switch(tt.le(tps, machep), one - machep, one - tps)
# Choose which continued fraction expansion for best convergence.
small = tt.lt(x * (a + b - 2.0) - (a - one), 0.0)
cfe = incomplete_beta_cfe(a, b, x, small)
w = tt.switch(small, cfe, cfe / xc)
# Direct incomplete beta accounting for flipped a, b.
t = tt.exp(
a * tt.log(x) + b * tt.log(xc) +
gammaln(a + b) - gammaln(a) - gammaln(b) +
tt.log(w / a)
)
t = tt.switch(
flip,
tt.switch(tt.le(t, machep), one - machep, one - t),
t
)
return tt.switch(
tt.and_(flip, tt.and_(tt.le((b * x), one), tt.le(x, 0.95))),
tps,
tt.switch(
tt.and_(tt.le(b * value, one), tt.le(value, 0.95)),
ps,
t))
def cohesion(X, inf=100.0):
D = distance_tensor(X)
E = direction_tensor(X)
n, d = neighbourhood(X)
F = T.zeros_like(E)
D = T.stack([D, D, D], axis=2)
d = T.stack([d, d, d], axis=2)
c1 = T.lt(D, rb)
c2 = T.and_(T.gt(D, rb), T.lt(D, ra))
c3 = T.and_(T.gt(D, ra), T.lt(D, r0))
F = T.set_subtensor(F[c1], -E[c1])
F = T.set_subtensor(F[c2], 0.25 * (D[c2] - re) / (ra - re) * E[c2])
F = T.set_subtensor(F[c3], E[c3])
return T.sum(d * F, axis=0)
def in_transit(self, t, r=0.0, texp=None):
"""Get a list of timestamps that are in transit
Args:
t (vector): A vector of timestamps to be evaluated.
r (Optional): The radii of the planets.
texp (Optional[float]): The exposure time.
Returns:
The indices of the timestamps that are in transit.
"""
z = tt.zeros_like(self.a)
r = tt.as_tensor_variable(r) + z
R = self.r_star + z
# Wrap the times into time since transit
hp = 0.5 * self.period
dt = tt.mod(self._warp_times(t) - self.t0 + hp, self.period) - hp
if self.ecc is None:
# Equation 14 from Winn (2010)
k = r / R
arg = tt.square(1 + k) - tt.square(self.b)
factor = R / (self.a * self.sin_incl)
hdur = hp * tt.arcsin(factor * tt.sqrt(arg)) / np.pi
t_start = -hdur
t_end = hdur
flag = z
else:
M_contact = self.contact_points_op(
self.a, self.ecc, self.cos_omega, self.sin_omega,
self.cos_incl + z, self.sin_incl + z, R + r)
flag = M_contact[2]
t_start = (M_contact[0] - self.M0) / self.n
t_start = tt.mod(t_start + hp, self.period) - hp
t_end = (M_contact[1] - self.M0) / self.n
t_end = tt.mod(t_end + hp, self.period) - hp
t_start = tt.switch(tt.gt(t_start, 0.0),
t_start - self.period, t_start)
t_end = tt.switch(tt.lt(t_end, 0.0),
t_end + self.period, t_end)
if texp is not None:
t_start -= 0.5*texp
t_end += 0.5*texp
mask = tt.any(tt.and_(dt >= t_start, dt <= t_end), axis=-1)
result = ifelse(tt.all(tt.eq(flag, 0)),
tt.arange(t.size)[mask],
tt.arange(t.size))
return result
def objective(y_true, y_pred, P, Q, alpha=0., beta=0.15, dbeta=0., gamma=0.01, gamma1=-1., poos=0.23, eps=1e-6):
'''Expects a binary class matrix instead of a vector of scalar classes.
'''
beta = np.float32(beta)
dbeta = np.float32(dbeta)
gamma = np.float32(gamma)
poos = np.float32(poos)
eps = np.float32(eps)
# scale preds so that the class probas of each sample sum to 1
y_pred += eps
y_pred /= y_pred.sum(axis=-1, keepdims=True)
y_true = T.cast(y_true.flatten(), 'int64')
y1 = T.and_(T.gt(y_true, 0), T.le(y_true, Q)) # in-set
y0 = T.or_(T.eq(y_true, 0), T.gt(y_true, Q)) # out-of-set or unlabeled
y0sum = y0.sum() + eps # number of oos
y1sum = y1.sum() + eps # number of in-set
# we want to reduce cross entrophy of labeled data
# convert all oos/unlabeled to label=0
cost0 = T.nnet.categorical_crossentropy(y_pred, T.switch(y_true <= Q, y_true, 0))
cost0 = T.dot(y1, cost0) / y1sum # average cost per labeled example
if alpha:
cost1 = T.nnet.categorical_crossentropy(y_pred, y_pred)
cost1 = T.dot(y0, cost1) / y0sum # average cost per labeled example
cost0 += alpha*cost1
# we want to increase the average entrophy in each batch
# average over batch
if beta:
y_pred_avg0 = T.dot(y0, y_pred) / y0sum
y_pred_avg0 = T.clip(y_pred_avg0, eps, np.float32(1) - eps)
y_pred_avg0 /= y_pred_avg0.sum(axis=-1, keepdims=True)
cost2 = T.nnet.categorical_crossentropy(y_pred_avg0.reshape((1,-1)), P-dbeta)[0] # [None,:]
cost2 = T.switch(y0sum > 0.5, cost2, 0.) # ignore cost2 if no samples
cost0 += beta*cost2
# binary classifier score
if gamma:
y_pred0 = T.clip(y_pred[:,0], eps, np.float32(1) - eps)
if gamma1 < 0.:
cost3 = - T.dot(poos*y0,T.log(y_pred0)) - T.dot(np.float32(1)-poos*y0.T,T.log(np.float32(1)-y_pred0))
cost3 /= y_pred.shape[0]
cost0 += gamma*cost3
elif gamma1 > 0.:
cost3 = - T.dot(poos*y0,T.log(y_pred0)) - T.dot((np.float32(1)-poos)*y0,T.log(np.float32(1)-y_pred0))
cost3 /= y0sum
cost31 = - T.dot(y1,T.log(np.float32(1)-y_pred0))
cost3 /= y1sum
cost0 += gamma*cost3 + gamma1*cost31
else: # gamma1 == 0.
cost3 = - T.dot(poos*y0,T.log(y_pred0)) - T.dot((np.float32(1)-poos)*y0, T.log(np.float32(1)-y_pred0))
cost3 /= y0sum
cost0 += gamma*cost3
return cost0
def dtw(i, q_p, b_p, Q, D, inf): i0 = T.eq(i, 0) # inf = T.cast(1e10,'float32') * T.cast(T.switch(T.eq(self.n,0), T.switch(T.eq(i,0), 0, 1), 1), 'float32') penalty = T.switch(T.and_(T.neg(n0), i0), big, T.constant(0.0, 'float32')) loop = T.constant(0.0, 'float32') + q_p forward = T.constant(0.0, 'float32') + T.switch(T.or_(n0, i0), 0, Q[i - 1]) opt = T.stack([loop, forward]) k_out = T.cast(T.argmin(opt, axis=0), 'int32') return opt[k_out, T.arange(opt.shape[1])] + D[i] + penalty, k_out
def dtw(i, q_p, b_p, Q, D, inf): i0 = T.eq(i, 0) # inf = T.cast(1e10,'float32') * T.cast(T.switch(T.eq(self.n,0), T.switch(T.eq(i,0), 0, 1), 1), 'float32') penalty = T.switch(T.and_(T.neg(n0), i0), big, T.constant(0.0, 'float32')) loop = T.constant(0.0, 'float32') + q_p forward = T.constant(0.0, 'float32') + T.switch(T.or_(n0, i0), 0, Q[i - 1]) opt = T.stack([loop, forward]) k_out = T.cast(T.argmin(opt, axis=0), 'int32') return opt[k_out, T.arange(opt.shape[1])] + D[i] + penalty, k_out
def jaccard_similarity(y_true, y_predicted):
"""
y_true: tensor ({1, 0})
y_predicted: tensor ({1, 0})
note - we round predicted because float probabilities would not work
"""
y_predicted = T.round(y_predicted).astype(theano.config.floatX)
either_nonzero = T.or_(T.neq(y_true, 0), T.neq(y_predicted, 0))
return T.and_(T.neq(y_true, y_predicted), either_nonzero).sum(axis=-1, dtype=theano.config.floatX) / either_nonzero.sum(axis=-1, dtype=theano.config.floatX)
def masked_categorical_accuracy(y_true, y_pred, mask):
y_true = K.argmax(y_true, axis=-1)
y_pred = K.argmax(y_pred, axis=-1)
error = K.equal(y_true, y_pred)
mask_template = T.and_(T.neq(y_true, mask), T.neq(y_true, 0)).nonzero()
return K.mean(error[mask_template])
def masked_categorical_accuracy(y_true, y_pred, mask):
y_true = K.argmax(y_true, axis=-1)
y_pred = K.argmax(y_pred, axis=-1)
error = K.equal(y_true, y_pred)
mask_template = T.and_(T.neq(y_true, mask), T.neq(y_true, 0)).nonzero()
return K.mean(error[mask_template])
def build_model(shared_params, options, other_params):
"""
Build the complete neural network model and return the symbolic variables
"""
# symbolic variables
x = tensor.matrix(name="x", dtype=floatX)
y1 = tensor.iscalar(name="y1")
y2 = tensor.iscalar(name="y2")
# lstm cell
(ht, ct) = lstm_cell(x, shared_params, options, other_params) # gets the ht, ct
# softmax 1 i.e. frame type prediction
activation = tensor.dot(shared_params['softmax1_W'], ht).transpose() + shared_params['softmax1_b']
frame_pred = tensor.nnet.softmax(activation) # .transpose()
# softmax 2 i.e. gesture class prediction
#
# predicted probability for frame type
f_pred_prob = theano.function([x], frame_pred, name="f_pred_prob")
# predicted frame type
f_pred = theano.function([x], frame_pred.argmax(), name="f_pred")
# cost
cost = ifelse(tensor.eq(y1, 1),
-tensor.log(frame_pred[0, 0] + options['log_offset']) * other_params['begin_cost_factor'],
ifelse(tensor.eq(y1, 2),
-tensor.log(frame_pred[0, 1] + options['log_offset']) * other_params['end_cost_factor'],
ifelse(tensor.and_(tensor.eq(y1, 3), tensor.eq(other_params['near_boundary'], 1)),
-tensor.log(frame_pred[0, 2] + frame_pred[0, 0] + options['log_offset']),
ifelse(tensor.and_(tensor.eq(y1, 3), tensor.eq(other_params['near_boundary'], 2)),
-tensor.log(frame_pred[0, 2] + frame_pred[0, 1] + options['log_offset']),
ifelse(tensor.eq(y1, 3),
-tensor.log(frame_pred[0, 2] + options['log_offset']),
tensor.abs_(tensor.log(y1)))))), name='ifelse_cost')
# ^ last else is a dummy value above. y1 = 1/2/3 based on the frame type
# function for output of the currect lstm cell and softmax prediction
f_model_cell_output = theano.function([x], (ht, ct, frame_pred), name="f_model_cell_output")
# return the model symbolic variables and theano functions
return x, y1, y2, f_pred_prob, f_pred, cost, f_model_cell_output
def spatial_gradient(prediction, target, l=0.1,m=2.):
# Flatten input to make calc easier
pred = prediction
pred_v = pred.flatten(2)
target_v = target.flatten(2)
# Compute mask
mask = T.gt(target_v,0.)
# Compute n of valid pixels
n_valid = T.sum(mask, axis=1)
# Apply mask and log transform
m_pred = pred_v * mask
m_t = T.switch(mask, T.log(target_v),0.)
d = m_pred - m_t
# Define scale invariant cost
scale_invariant_cost = (T.sum(n_valid * T.sum(d**2, axis=1)) - l*T.sum(T.sum(d, axis=1)**2))/ T.maximum(T.sum(n_valid**2), 1)
# Add spatial gradient components from D. Eigen DNL
# Squeeze in case
if pred.ndim == 4:
pred = pred[:,0,:,:]
if target.ndim == 4:
target = target[:,0,:,:]
# Mask in tensor form
mask_tensor = T.gt(target,0.)
# Project into log space
target = T.switch(mask_tensor, T.log(target),0.)
# Stepsize
h = 1
# Compute spatial gradients symbolically
p_di = (pred[:,h:,:] - pred[:,:-h,:]) * (1 / np.float32(h))
p_dj = (pred[:,:,h:] - pred[:,:,:-h]) * (1 / np.float32(h))
t_di = (target[:,h:,:] - target[:,:-h,:]) * (1 / np.float32(h))
t_dj = (target[:,:,h:] - target[:,:,:-h]) * (1 / np.float32(h))
m_di = T.and_(mask_tensor[:,h:,:], mask_tensor[:,:-h,:])
m_dj = T.and_(mask_tensor[:,:,h:], mask_tensor[:,:,:-h])
# Define spatial grad cost
grad_cost = T.sum(m_di * (p_di - t_di)**2) / T.sum(m_di) + T.sum(m_dj * (p_dj - t_dj)**2) / T.sum(m_dj)
# Compute final expression
return scale_invariant_cost + grad_cost
def _t_ratio_limits(
self,
t_single_traj_info,
):
r_max = globalconfig.vars.args.r_max
r_min = 1 / float(r_max)
prob_ratio = self._t_prob_ratio(t_single_traj_info)
upper_bound_valid = T.lt(T.max(prob_ratio), r_max)
lower_bound_valid = T.gt(T.min(prob_ratio), r_min)
valid = T.switch(T.and_(lower_bound_valid, upper_bound_valid), 1, -1)
return valid
def multiclassRealPosAndNegAndTruePredPosNegTraining0OrValidation1(
self, y, training0OrValidation1):
"""
The returned list has (numberOfClasses)x4 integers: >numberOfRealPositives, numberOfRealNegatives, numberOfTruePredictedPositives, numberOfTruePredictedNegatives< for each class (incl background).
For class_i == 0 (backgr), what is reported is the WHOLE rp,rn,tpp,tpn. ie, as calculated considering background VS all other classes.
Order in the list is the natural order of the classes (ie class-0-WHOLE RP,RN,TPP,TPN, class-1 RP,RN,TPP,TPN, class-2 RP,RN,TPP,TPN ...)
"""
returnedListWithNumberOfRpRnPpPnForEachClass = []
for class_i in xrange(0, self.numberOfOutputClasses):
#Number of Real Positive, Real Negatives, True Predicted Positives and True Predicted Negatives are reported PER CLASS (first for WHOLE).
vectorOneAtRealPositives = T.gt(y, 0) if class_i == 0 else T.eq(
y, class_i)
vectorOneAtRealNegatives = T.eq(y, 0) if class_i == 0 else T.neq(
y, class_i)
if training0OrValidation1 == 0: #training:
yPredToUse = self.y_pred
else: #validation
yPredToUse = self.y_pred_inference
vectorOneAtPredictedPositives = T.gt(
yPredToUse, 0) if class_i == 0 else T.eq(yPredToUse, class_i)
vectorOneAtPredictedNegatives = T.eq(
yPredToUse, 0) if class_i == 0 else T.neq(yPredToUse, class_i)
vectorOneAtTruePredictedPositives = T.and_(
vectorOneAtRealPositives, vectorOneAtPredictedPositives)
vectorOneAtTruePredictedNegatives = T.and_(
vectorOneAtRealNegatives, vectorOneAtPredictedNegatives)
returnedListWithNumberOfRpRnPpPnForEachClass.append(
T.sum(vectorOneAtRealPositives))
returnedListWithNumberOfRpRnPpPnForEachClass.append(
T.sum(vectorOneAtRealNegatives))
returnedListWithNumberOfRpRnPpPnForEachClass.append(
T.sum(vectorOneAtTruePredictedPositives))
returnedListWithNumberOfRpRnPpPnForEachClass.append(
T.sum(vectorOneAtTruePredictedNegatives))
return returnedListWithNumberOfRpRnPpPnForEachClass
def sequential_and(*conditions):
""" Use ``and`` operator between all conditions. Function is just
a syntax sugar that make long Theano logical conditions looks
less ugly.
Parameters
----------
*conditions
Conditions that returns ``True`` or ``False``
"""
first_condition, other_conditions = conditions[0], conditions[1:]
if not other_conditions:
return first_condition
return T.and_(first_condition, sequential_and(*other_conditions))
def apply_border_conditions(self, cursors, stack_mask, mask, action):
# Обрабатываем случаи, когда у агента есть только один выбор (закончились входные данные или в стеке нет двух элементов)
# Или вообще не надо делать выбор (вся строка посчитана)
sentence_length = K.sum(mask, axis=1)
cursor_pos = K.sum(cursors, axis=1)
stack_size = K.sum(stack_mask, axis=1)
input_is_empty = TS.eq(sentence_length - cursor_pos, -1)
stack_is_empty = TS.le(stack_size, 1)
action = TS.switch(input_is_empty, 0, action)
action = TS.switch(stack_is_empty, 1, action)
no_action = TS.and_(input_is_empty, stack_is_empty)
policy_calculated = 1 - TS.or_(input_is_empty, stack_is_empty)
return action, no_action, policy_calculated
def th_distance_field_cost(sdf: tt.TensorVariable, eps: float):
# Signed distance field cost function, as presented in paper.
# Given a signed distance field, and an epsilon distance, compute the obstacle cost.
sdneg = sdf < 0
sdeps = tt.and_(0 <= sdf, sdf <= eps)
# sdclr = eps < sdf
sdneg_v = -sdf + .5*eps
sdeps_v = .5*eps**-1.*(sdf - eps)**2.
# sdclr_v = 0.
# Again, not ideal to "index" this way (cz compute everything), but easy with theano.
return sdneg_v * sdneg + sdeps_v * sdeps # + sdclr_v * sdclr
def realPosAndNegAndTruePredPosNegTraining0OrValidation1(self, y, training0OrValidation1):
#***Implemented only for binary***. For multiclass, it counts real-positives as everything not-background, and as true positives the true predicted lesion (ind of class).
vectorOneAtRealPositives = T.gt(y,0)
vectorOneAtRealNegatives = T.eq(y,0)
if training0OrValidation1 == 0 : #training:
yPredToUse = self.y_pred
else: #validation
yPredToUse = self.y_pred_inference
vectorOneAtPredictedPositives = T.gt(yPredToUse,0)
vectorOneAtPredictedNegatives = T.eq(yPredToUse,0)
vectorOneAtTruePredictedPositives = T.and_(vectorOneAtRealPositives,vectorOneAtPredictedPositives)
vectorOneAtTruePredictedNegatives = T.and_(vectorOneAtRealNegatives,vectorOneAtPredictedNegatives)
numberOfRealPositives = T.sum(vectorOneAtRealPositives)
numberOfRealNegatives = T.sum(vectorOneAtRealNegatives)
numberOfTruePredictedPositives = T.sum(vectorOneAtTruePredictedPositives)
numberOfTruePredictedNegatives = T.sum(vectorOneAtTruePredictedNegatives)
return [ numberOfRealPositives,
numberOfRealNegatives,
numberOfTruePredictedPositives,
numberOfTruePredictedNegatives
]
def berhu_spatial(predictions, targets, s=0.2, l=0., m=10., gw=0.5):
# Compute mask
mask = T.gt(targets, l) * T.lt(targets,m)
# Compute n of valid pixels
n_valid = T.sum(mask)
r = (predictions - targets) * mask
c = s * T.max(T.abs_(r))
a_r = T.abs_(r)
b = T.switch(T.lt(a_r, c), a_r, ((r**2) + (c**2))/(2*c))
pixel_cost = T.sum(b)/n_valid
# Gradient cost
h = 1
pred = predictions
target = targets
if pred.ndim == 4:
pred = pred[:,0,:,:]
if target.ndim == 4:
target = target[:,0,:,:]
# Recompute mask
mask = T.gt(target, l) * T.lt(target,m)
p_di = (pred[:,h:,:] - pred[:,:-h,:]) * (1 / np.float32(h))
p_dj = (pred[:,:,h:] - pred[:,:,:-h]) * (1 / np.float32(h))
t_di = (target[:,h:,:] - target[:,:-h,:]) * (1 / np.float32(h))
t_dj = (target[:,:,h:] - target[:,:,:-h]) * (1 / np.float32(h))
m_di = T.and_(mask[:,h:,:], mask[:,:-h,:])
m_dj = T.and_(mask[:,:,h:], mask[:,:,:-h])
# Define spatial grad cost
grad_cost = T.sum(m_di * T.abs_(p_di - t_di)) / T.sum(m_di) + T.sum(m_dj * T.abs_(p_dj - t_dj)) / T.sum(m_dj)
return gw * grad_cost + pixel_cost
def compute_test_VOC_loss(self):
# works for 0-1 loss
all_y_pred = numpy.empty([])
for i in xrange(self.n_test_batches):
[y_pred, test_loss] = self.test_model(i)
if i==0:
all_y_pred = y_pred
else:
all_y_pred = numpy.concatenate((all_y_pred, y_pred))
print all_y_pred
print all_y_pred.shape
F = T.sum(T.neq(self.test_set_y, all_y_pred))
TP = T.sum(T.and_(T.eq(self.test_set_y, 1), T.eq(all_y_pred, 1)))
result = TP/T.cast(TP+F, theano.config.floatX)
print 'Print result is ', result.eval()
return result.eval()
def _rejection_sampling(self, output_z, alpha, idx):
eps = self.srng.normal(idx.shape, dtype=alpha.dtype)
U = self.srng.uniform(idx.shape,
low=epsilon(),
high=1 - epsilon(),
dtype=alpha.dtype)
z, judge1, judge2 = self._h(alpha[idx], eps)
_idx_binary = T.and_(T.lt(U, judge1), T.gt(eps, judge2))
output_z = T.set_subtensor(output_z[idx[_idx_binary.nonzero()]],
z[_idx_binary.nonzero()])
# update idx
idx = idx[T.eq(0, _idx_binary).nonzero()]
return output_z, idx
def _rejection_sampling(self, output_z, alpha, idx):
eps = self.srng.normal(idx.shape, dtype=alpha.dtype)
U = self.srng.uniform(idx.shape,
low=epsilon(),
high=1 - epsilon(),
dtype=alpha.dtype)
z, judge1, judge2 = self._h(alpha[idx], eps)
_idx_binary = T.and_(T.lt(U, judge1), T.gt(eps, judge2))
output_z = T.set_subtensor(output_z[idx[_idx_binary.nonzero()]],
z[_idx_binary.nonzero()])
# update idx
idx = idx[T.eq(0, _idx_binary).nonzero()]
return output_z, idx
def search_iteration_step(x_previous, x_current, y_previous, y_current,
y_deriv_previous, is_first_iteration, x_star):
y_deriv_current = f_deriv(x_current)
x_new = x_current * asfloat(2)
y_new = f(x_new)
condition1 = T.or_(
y_current > (y0 + c1 * x_current * y_deriv_0),
T.and_(
y_current >= y_previous,
bitwise_not(is_first_iteration),
))
condition2 = T.abs_(y_deriv_current) <= -c2 * y_deriv_0
condition3 = y_deriv_current >= zero
x_star = ifelse(
condition1,
zoom(x_previous, x_current, y_previous, y_current,
y_deriv_previous, f, f_deriv, y0, y_deriv_0, c1, c2),
ifelse(
condition2,
x_current,
ifelse(
condition3,
zoom(x_current, x_previous, y_current, y_previous,
y_deriv_current, f, f_deriv, y0, y_deriv_0, c1, c2),
x_new,
),
),
)
y_deriv_previous_new = ifelse(condition1, y_deriv_previous,
y_deriv_current)
is_any_condition_satisfied = sequential_or(condition1, condition2,
condition3)
y_current_new = ifelse(is_any_condition_satisfied, y_current, y_new)
return ([
x_current, x_new, y_current, y_current_new, y_deriv_previous_new,
theano_false, x_star
],
theano.scan_module.scan_utils.until(
sequential_or(
T.eq(x_new, zero),
is_any_condition_satisfied,
)))
def compute_validation_VOC_loss(self):
"""Added validation loss"""
# works for 0-1 loss
all_y_pred = numpy.empty([])
for i in xrange(self.n_valid_batches):
y_pred = self.validate_model(i)
if i == 0:
all_y_pred = y_pred
else:
all_y_pred = numpy.concatenate((all_y_pred, y_pred))
print all_y_pred
F = T.sum(T.neq(self.valid_set_y, all_y_pred))
TP = T.sum(T.and_(T.eq(self.valid_set_y, 1), T.eq(all_y_pred, 1)))
result = TP/T.cast(TP+F, theano.config.floatX)
print 'Print result is ', result.eval()
return result.eval()
def logp_loss2(self,
x,
y,
fake_label,
neg_label,
ismax=True): # neg_label is the maximum label id
y = y.dimshuffle((1, 0))
inx = x.dimshuffle((1, 0))
fake_mask = T.neq(y, fake_label)
y = y * fake_mask
pos_mask = T.and_(fake_mask, T.le(y, neg_label - 1))
neg_mask = T.ge(y, neg_label)
iny = y * pos_mask
pos_pro, neg_pro = self.structure2(inx)
if ismax:
neg_pro = T.max(neg_pro, axis=-1)
#pos_pro : sequence * batch * pos label
#neg_pro :sequence *batch
pos_logp = T.nnet.categorical_crossentropy(
pos_pro.reshape(
(pos_pro.shape[0] * pos_pro.shape[1], pos_pro.shape[2])),
iny.flatten())
# sequence * batch
pos_logp = pos_logp.reshape(y.shape) * pos_mask
pos_loss = T.sum(pos_logp)
neg_loss = 0 - T.sum(T.log(neg_pro) * neg_mask)
loss = (pos_loss + neg_loss) / (T.sum(pos_mask) + T.sum(neg_mask))
else:
pro = T.concatenate((pos_pro, neg_pro), axis=2)
pro = pro.reshape((pro.shape[0] * pro.shape[1], pro.shape[2]))
y = y.flatten()
losslist = T.nnet.categorical_crossentropy(pro, y)
losslist = losslist.reshape(fake_mask.shape)
losslist = losslist * fake_mask
loss = T.sum(losslist) / T.sum(fake_mask)
return loss
def compute_test_VOC_loss(self):
# works for 0-1 loss
all_y_pred = numpy.empty([])
for i in xrange(self.n_test_batches):
[y_pred, test_loss] = self.test_model_result(i)
if i==0:
all_y_pred = y_pred
else:
all_y_pred = numpy.concatenate((all_y_pred, y_pred))
print all_y_pred
print all_y_pred.shape
F = T.sum(T.neq(self.test_set_y, all_y_pred))
TP = T.sum(T.and_(T.eq(self.test_set_y, 1), T.eq(all_y_pred, 1)))
result = TP/T.cast(TP+F, theano.config.floatX)
print 'Print result is ', result.eval()
# open file and write array to file
f = open(self.cached_weights_file + "_results.txt","a")
numpy.savetxt(f, all_y_pred)
f.close()
return result.eval()
def quadratic_weighted_kappa_loss(y_true, y_pred):
min_rating = T.minimum(T.min(y_true), T.min(y_pred))
max_rating = T.maximum(T.max(y_true), T.max(y_pred))
hist_true = T.bincount(y_true, minlength=max_rating)
hist_pred = T.bincount(y_pred, minlength=max_rating)
num_ratings = (max_rating - min_rating) + 1
num_scored = float(len(y_true))
numerator = T.zeros(1)
denominator = T.zeros(1)
z = T.zeros(len(y_true))
for i_true in range(min_rating, max_rating + 1):
for j_pred in range(min_rating, max_rating + 1):
expected = T.true_div(T.mul(hist_true[i_true], hist_pred[j_pred]), num_scored)
d = T.true_div(T.sqr(i_true - j_pred), T.sqr(num_ratings - 1.))
conf_mat_cell = T.sum(T.and_(T.eq(T.sub(y_true, i_true), z), T.eq(T.sub(y_pred, j_pred), z)))
numerator = T.add(numerator, T.true_div(T.mul(d, conf_mat_cell), num_scored))
denominator = T.add(denominator, T.true_div(T.mul(d, expected), num_scored))
return T.true_div(numerator, denominator)
def logp_loss3(self,
x,
y,
fake_label,
neg_label,
pos_ratio=0.5): #adopt maxout for negative
# pos_rati0 means pos examples weight (0.5 means equal 1:1)
print "adopt positives weight ............. " + str(pos_ratio)
y = y.dimshuffle((1, 0))
inx = x.dimshuffle((1, 0))
fake_mask = T.neq(y, fake_label)
y = y * fake_mask
pos_mask = T.and_(fake_mask, T.le(y, neg_label - 1)) * pos_ratio
neg_mask = T.ge(y, neg_label) * (1 - pos_ratio)
pos_score, neg_score = self.structure2(inx, False)
maxneg = T.max(neg_score, axis=-1)
scores = T.concatenate((pos_score, maxneg.dimshuffle((0, 1, 'x'))),
axis=2)
d3shape = scores.shape
#seq*batch , label
scores = scores.reshape((d3shape[0] * d3shape[1], d3shape[2]))
pro = T.nnet.softmax(scores)
_logp = T.nnet.categorical_crossentropy(pro, y.flatten())
_logp = _logp.reshape(fake_mask.shape)
loss = (T.sum(_logp * pos_mask) +
T.sum(_logp * neg_mask)) / (T.sum(pos_mask) + T.sum(neg_mask))
pos_loss = T.sum(_logp * pos_mask)
neg_loss = T.sum(_logp * neg_mask)
return loss, pos_loss, neg_loss
def logp_loss2(self,x,y, fake_label, neg_label, ismax = True):# neg_label is the maximum label id y = y.dimshuffle((1,0)) inx = x.dimshuffle((1,0)) fake_mask = T.neq(y, fake_label) y = y*fake_mask pos_mask = T.and_(fake_mask, T.le(y, neg_label-1)) neg_mask = T.ge(y, neg_label) iny = y*pos_mask pos_pro, neg_pro = self.structure2(inx) if ismax: neg_pro = T.max(neg_pro, axis = -1) #pos_pro : sequence * batch * pos label #neg_pro :sequence *batch pos_logp = T.nnet.categorical_crossentropy(pos_pro.reshape((pos_pro.shape[0]*pos_pro.shape[1], pos_pro.shape[2])), iny.flatten()) # sequence * batch pos_logp = pos_logp.reshape(y.shape)*pos_mask pos_loss = T.sum(pos_logp) neg_loss = 0 - T.sum(T.log(neg_pro)*neg_mask) loss = (pos_loss + neg_loss)/ (T.sum(pos_mask)+T.sum(neg_mask)) else: pro = T.concatenate((pos_pro, neg_pro), axis = 2) pro = pro.reshape((pro.shape[0]*pro.shape[1], pro.shape[2])) y = y.flatten() losslist = T.nnet.categorical_crossentropy(pro, y) losslist = losslist.reshape(fake_mask.shape) losslist = losslist*fake_mask loss = T.sum(losslist) / T.sum(fake_mask) return loss
def predict(model_path):
with open(model_path, 'r') as f:
network = cPickle.load(f)
target_var = T.imatrix('y')
predict_prediction = get_output(network, deterministic=True)
predict_acc = binary_accuracy(predict_prediction, target_var).mean()
# calculate win rate
win_rate_result1 = []
win_rate_result2 = []
for win_rate_threhold in [0.5, 0.6, 0.7, 0.8, 0.9]:
tmp1 = T.sum(T.switch(T.and_(T.gt(predict_prediction, win_rate_threhold), T.eq(target_var, 1)), 1, 0),
dtype=theano.config.floatX)
tmp2 = T.sum(T.switch(T.gt(predict_prediction, win_rate_threhold), 1, 0), dtype=theano.config.floatX)
test_win_rate = (tmp1 + 0.00001) / (tmp2 + 0.00001)
win_rate_result1.append(test_win_rate)
win_rate_result2.append(tmp1)
input_layer = get_all_layers(network)[0]
predict = theano.function(inputs=[input_layer.input_var, target_var],
outputs=[predict_prediction, predict_acc, T.as_tensor_variable(win_rate_result1), T.as_tensor_variable(win_rate_result2)],
on_unused_input='warn')
X, y, labels, values, _, _, _, _, _, _ = load_dataset('../../data/predict.txt')
predict_prediction, predict_acc, win_rate_result1, win_rate_result2 = predict(X, y)
for ix in range(len([0.5, 0.6, 0.7, 0.8, 0.9])):
sys.stdout.write(" predict win rate loss:\t\t\t{}\n".format(win_rate_result1[ix]))
sys.stdout.write(" predict possitive num:\t\t\t{}\n".format(win_rate_result2[ix]))
sys.stdout.write(" predict accuracy:\t\t\t{} %\n".format(predict_acc * 100))
#output predict result
with open('../../data/prediction', 'w') as f:
for ix in xrange(len(labels)):
line = str(labels[ix]) + '\t' + str(values[ix]) + '\t' + str(predict_prediction[ix][0]) + '\n'
f.write(line)
sys.stdout.flush()
def in_transit(self, t, r=0.0, texp=None):
"""Get a list of timestamps that are in transit
Args:
t (vector): A vector of timestamps to be evaluated.
r (Optional): The radii of the planets.
texp (Optional[float]): The exposure time.
Returns:
The indices of the timestamps that are in transit.
"""
z = tt.zeros_like(self.a)
r = tt.as_tensor_variable(r) + z
R = self.r_star + z
if self.ecc is None:
M_contact = self.contact_points_op(self.a, self.incl + z, r, R)
else:
M_contact = self.contact_points_op(self.a, self.ecc, self.omega,
self.incl + z, r, R)
# Wrap the times into time since transit
hp = 0.5 * self.period
t_start = (M_contact[0] - self.M0) / self.n
t_start = tt.mod(t_start + hp, self.period) - hp
t_end = (M_contact[3] - self.M0) / self.n
t_end = tt.mod(t_end + hp, self.period) - hp
dt = tt.mod(self._warp_times(t) - self.t0 + hp, self.period) - hp
if texp is not None:
t_start -= 0.5 * texp
t_end += 0.5 * texp
mask = tt.any(tt.and_(dt >= t_start, dt <= t_end), axis=-1)
return tt.arange(t.size)[mask]
def calculate_specificity(self, x, y):
true_negatives = T.sum(T.and_(T.eq(x, 0), T.eq(y, 0)))
specificity = true_negatives / T.sum(T.eq(y, 0))
return specificity
def calculate_sensitivity(self, x, y):
true_positives = T.sum(T.and_(T.eq(x, 1), T.eq(y, 1)))
sensitivity = true_positives / T.sum(T.eq(y, 1))
return sensitivity
def and_(x, y):
return T.and_(x, y)
def __call__(self, g_loss, d_loss):
d_loss = ifelse(
T.and_(g_loss > self.high, d_loss < 1.5 * self.high),
0. * d_loss, d_loss)
return g_loss, d_loss
def __init__(self, batch_size=None, rng=None, load_file=None, params=None):
if not rng:
rng = np.random.RandomState(None)
self.input = T.tensor4("input") # position matrix
self.batch_size = batch_size
layer0_D3 = 48
layer0_D5 = 80
layer0 = HexConvLayer(
rng,
self.input,
(batch_size, num_channels, input_size, input_size),
layer0_D5,
layer0_D3,
params=params[0:3] if params else None,
)
layer1_D3 = 64
layer1_D5 = 64
layer1 = HexConvLayer(
rng,
layer0.output,
(batch_size, layer0_D3 + layer0_D5, input_size, input_size),
layer1_D5,
layer1_D3,
params[3:6] if params else None,
)
layer2_D3 = 80
layer2_D5 = 48
layer2 = HexConvLayer(
rng,
layer1.output,
(batch_size, layer1_D3 + layer1_D5, input_size, input_size),
layer2_D5,
layer2_D3,
params[6:9] if params else None,
)
layer3_D3 = 96
layer3_D5 = 32
layer3 = HexConvLayer(
rng,
layer2.output,
(batch_size, layer2_D3 + layer2_D5, input_size, input_size),
layer3_D5,
layer3_D3,
params[9:12] if params else None,
)
layer4_D3 = 112
layer4_D5 = 16
layer4 = HexConvLayer(
rng,
layer3.output,
(batch_size, layer3_D3 + layer3_D5, input_size, input_size),
layer4_D5,
layer4_D3,
params[12:15] if params else None,
)
layer5_D3 = 128
layer5_D5 = 0
layer5 = HexConvLayer(
rng,
layer4.output,
(batch_size, layer4_D3 + layer4_D5, input_size, input_size),
layer5_D5,
layer5_D3,
params[15:18] if params else None,
)
layer6_D3 = 128
layer6_D5 = 0
layer6 = HexConvLayer(
rng,
layer5.output,
(batch_size, layer5_D3 + layer5_D5, input_size, input_size),
layer6_D5,
layer6_D3,
params[18:21] if params else None,
)
layer7_D3 = 128
layer7_D5 = 0
layer7 = HexConvLayer(
rng,
layer6.output,
(batch_size, layer6_D3 + layer6_D5, input_size, input_size),
layer7_D5,
layer7_D3,
params[21:24] if params else None,
)
layer8_D3 = 128
layer8_D5 = 0
layer8 = HexConvLayer(
rng,
layer7.output,
(batch_size, layer7_D3 + layer7_D5, input_size, input_size),
layer8_D5,
layer8_D3,
params[24:27] if params else None,
)
layer9_D3 = 128
layer9_D5 = 0
layer9 = HexConvLayer(
rng,
layer8.output,
(batch_size, layer8_D3 + layer8_D5, input_size, input_size),
layer9_D5,
layer9_D3,
params[27:30] if params else None,
)
layer10 = FullyConnectedLayer(
rng,
layer9.output.flatten(2),
(layer9_D3 + layer9_D5) * input_size * input_size,
boardsize * boardsize,
params[30:32] if params else None,
)
not_played = T.and_(
T.eq(self.input[:, white, padding : boardsize + padding, padding : boardsize + padding].flatten(2), 0),
T.eq(self.input[:, black, padding : boardsize + padding, padding : boardsize + padding].flatten(2), 0),
)
playable_output = T.nnet.softmax(layer10.output[not_played.nonzero()])
output = T.switch(not_played, layer10.output, -1 * np.inf)
self.output = T.nnet.softmax(output)
self.params = (
layer0.params
+ layer1.params
+ layer2.params
+ layer3.params
+ layer4.params
+ layer5.params
+ layer6.params
+ layer7.params
+ layer8.params
+ layer9.params
+ layer10.params
)
self.mem_size = (
layer1.mem_size
+ layer2.mem_size
+ layer3.mem_size
+ layer4.mem_size
+ layer5.mem_size
+ layer6.mem_size
+ layer7.mem_size
+ layer8.mem_size
+ layer9.mem_size
+ layer10.mem_size
)
vw_new_direction = xi12 * T.sqrt((1. - T.sqr(u_new_direction)) / t_xi)
uvw_new_direction = T.concatenate([u_new_direction, vw_new_direction], axis=1)
#theano.printing.Print('t_xi')(t_xi)
#theano.printing.Print('vw')(vw_new_direction)
#theano.printing.Print('uvw')(uvw_new_direction)
# roulette
weight_for_starting_roulette = 0.001
CHANCE = 0.1
partakes_roulette = T.switch(T.lt(new_weight, weight_for_starting_roulette),
1,
0)
roulette = rng.uniform((photons,1), low=0., high=1.)
loses_roulette = T.gt(roulette, CHANCE)
# if roulette decides to ter+minate the photon: set weight to 0
weight_after_roulette = T.switch(T.and_(partakes_roulette, loses_roulette),
0.,
new_weight)
# if partakes in roulette but does not get terminated
weight_after_roulette = T.switch(T.and_(partakes_roulette, T.invert(loses_roulette)),
weight_after_roulette / CHANCE,
weight_after_roulette)
#theano.printing.Print('new weight')(new_weight)
#theano.printing.Print('partakes_roulette')(partakes_roulette)
#theano.printing.Print('loses_roulette')(loses_roulette)
#theano.printing.Print('weight_after_roulette')(weight_after_roulette)
one_cycle = theano.function(inputs=[mu_a, mu_s, microns_per_shell],
outputs=[shells, new_heats],
updates=OrderedDict({xyz: xyz_moved, uvw: uvw_new_direction,