def _cal(self, x_new: Number, y_new: Number):
p = np.where(np.abs(self.x - x_new) == np.abs(self.x - x_new).min())[0][0] - 1
q = np.where(np.abs(self.y - y_new) == np.abs(self.y - y_new).min())[0][0] - 1
sum_ = 0
for pi in range(p, p + 3):
for qi in range(q, q + 3):
_p = np.empty(shape=(3,))
_q = np.empty(shape=(3,))
for i, p_ in enumerate(range(p, p + 3)):
if pi != p_:
_p[i] = (x_new - self.x[p_]) / (self.x[pi] - self.x[p_])
else:
_p[i] = np.nan
for i, q_ in enumerate(range(q, q + 3)):
if qi != q_:
_q[i] = (y_new - self.y[q_]) / (self.y[qi] - self.y[q_])
else:
_q[i] = np.nan
p_prod = np.nanprod(_p)
q_prod = np.nanprod(_q)
sum_ += p_prod * q_prod * self.z[pi, qi]
return sum_
def testNanReduction(self):
raw = np.random.choice(a=[0, 1, np.nan], size=(10, 10), p=[0.3, 0.4, 0.3])
arr = tensor(raw, chunks=3)
self.assertEqual(np.nansum(raw), self.executor.execute_tensor(nansum(arr))[0])
self.assertEqual(np.nanprod(raw), self.executor.execute_tensor(nanprod(arr))[0])
self.assertEqual(np.nanmax(raw), self.executor.execute_tensor(nanmax(arr))[0])
self.assertEqual(np.nanmin(raw), self.executor.execute_tensor(nanmin(arr))[0])
self.assertEqual(np.nanmean(raw), self.executor.execute_tensor(nanmean(arr))[0])
self.assertAlmostEqual(np.nanvar(raw), self.executor.execute_tensor(nanvar(arr))[0])
self.assertAlmostEqual(np.nanvar(raw, ddof=1), self.executor.execute_tensor(nanvar(arr, ddof=1))[0])
self.assertAlmostEqual(np.nanstd(raw), self.executor.execute_tensor(nanstd(arr))[0])
self.assertAlmostEqual(np.nanstd(raw, ddof=1), self.executor.execute_tensor(nanstd(arr, ddof=1))[0])
arr = tensor(raw, chunks=10)
self.assertEqual(np.nansum(raw), self.executor.execute_tensor(nansum(arr))[0])
self.assertEqual(np.nanprod(raw), self.executor.execute_tensor(nanprod(arr))[0])
self.assertEqual(np.nanmax(raw), self.executor.execute_tensor(nanmax(arr))[0])
self.assertEqual(np.nanmin(raw), self.executor.execute_tensor(nanmin(arr))[0])
self.assertEqual(np.nanmean(raw), self.executor.execute_tensor(nanmean(arr))[0])
self.assertAlmostEqual(np.nanvar(raw), self.executor.execute_tensor(nanvar(arr))[0])
self.assertAlmostEqual(np.nanvar(raw, ddof=1), self.executor.execute_tensor(nanvar(arr, ddof=1))[0])
self.assertAlmostEqual(np.nanstd(raw), self.executor.execute_tensor(nanstd(arr))[0])
self.assertAlmostEqual(np.nanstd(raw, ddof=1), self.executor.execute_tensor(nanstd(arr, ddof=1))[0])
raw = np.random.random((10, 10))
raw[:3, :3] = np.nan
arr = tensor(raw, chunks=3)
self.assertEqual(np.nanargmin(raw), self.executor.execute_tensor(nanargmin(arr))[0])
self.assertEqual(np.nanargmax(raw), self.executor.execute_tensor(nanargmax(arr))[0])
raw = np.full((10, 10), np.nan)
arr = tensor(raw, chunks=3)
self.assertEqual(0, self.executor.execute_tensor(nansum(arr))[0])
self.assertEqual(1, self.executor.execute_tensor(nanprod(arr))[0])
self.assertTrue(np.isnan(self.executor.execute_tensor(nanmax(arr))[0]))
self.assertTrue(np.isnan(self.executor.execute_tensor(nanmin(arr))[0]))
self.assertTrue(np.isnan(self.executor.execute_tensor(nanmean(arr))[0]))
self.assertRaises(ValueError, lambda: self.executor.execute_tensor(nanargmin(arr))[0])
self.assertRaises(ValueError, lambda: self.executor.execute_tensor(nanargmax(arr))[0])
raw = sps.random(10, 10, density=.1, format='csr')
raw[:3, :3] = np.nan
arr = tensor(raw, chunks=3)
self.assertAlmostEqual(np.nansum(raw.A), self.executor.execute_tensor(nansum(arr))[0])
self.assertAlmostEqual(np.nanprod(raw.A), self.executor.execute_tensor(nanprod(arr))[0])
self.assertAlmostEqual(np.nanmax(raw.A), self.executor.execute_tensor(nanmax(arr))[0])
self.assertAlmostEqual(np.nanmin(raw.A), self.executor.execute_tensor(nanmin(arr))[0])
self.assertAlmostEqual(np.nanmean(raw.A), self.executor.execute_tensor(nanmean(arr))[0])
self.assertAlmostEqual(np.nanvar(raw.A), self.executor.execute_tensor(nanvar(arr))[0])
self.assertAlmostEqual(np.nanvar(raw.A, ddof=1), self.executor.execute_tensor(nanvar(arr, ddof=1))[0])
self.assertAlmostEqual(np.nanstd(raw.A), self.executor.execute_tensor(nanstd(arr))[0])
self.assertAlmostEqual(np.nanstd(raw.A, ddof=1), self.executor.execute_tensor(nanstd(arr, ddof=1))[0])
arr = nansum(1)
self.assertEqual(self.executor.execute_tensor(arr)[0], 1)
def patient_staging(pi0,event_centers,likeli_post,likeli_pre,type_staging):
L_yes=np.divide(likeli_post,likeli_post+likeli_pre+1e-10)
L_no = 1 - L_yes
event_centers_pad=np.insert(event_centers,0,0)
event_centers_pad=np.append(event_centers_pad,1)
pk_s=np.diff(event_centers_pad)
pk_s[:]=1;
m=L_yes.shape
prob_stage = np.zeros((m[0],m[1]+1))
p_no_perm = L_no[:,pi0];
p_yes_perm = L_yes[:,pi0];
for j in range(m[1]+1):
prob_stage[:,j]=pk_s[j]*np.multiply(np.nanprod(p_yes_perm[:,:j],axis=1),np.nanprod(p_no_perm[:,j:],axis=1))
all_stages_rep2=matlib.repmat(event_centers_pad[:-1],m[0],1)
if type_staging[0]=='exp':
subj_stages = np.zeros(prob_stage.shape[0])
for i in range(prob_stage.shape[0]):
idx_nan=np.isnan(p_yes_perm[i,:])
pr=prob_stage[i,1:]
ev = event_centers_pad[1:-1]
subj_stages[i]=np.mean(np.multiply(np.append(prob_stage[i,0],pr[~idx_nan]),np.append(event_centers_pad[0],ev[~idx_nan])))/(np.mean(np.append(prob_stage[i,0],pr[~idx_nan])))
elif type_staging[0]=='ml':
subj_stages=np.argmax(prob_stage,axis=1)
return subj_stages
def _find_configs(self, eV, T_des=None):
"""
Find the optimal configurations for attaining
desired transmission ``T_des`` at photon
energy ``eV``.
Returns configurations which yield closest
highest and lowest transmissions and their
transmission values.
"""
if not T_des:
T_des = self.T_des.get()
T_set = self._all_transmissions(eV)
T_table = np.nanprod(T_set * self.config_table, axis=1)
T_config_table = np.asarray(
sorted(np.transpose([T_table[:],
range(len(self.config_table))]),
key=lambda x: x[0]))
i = np.argmin(np.abs(T_config_table[:, 0] - T_des))
closest = self.config_table[T_config_table[i, 1]]
T_closest = np.nanprod(T_set * closest)
if T_closest == T_des:
config_bestHigh = config_bestLow = closest
T_bestHigh = T_bestLow = T_closest
if T_closest < T_des:
config_bestHigh = self.config_table[T_config_table[i + 1, 1]]
config_bestLow = closest
T_bestHigh = np.nanprod(T_set * config_bestHigh)
T_bestLow = T_closest
if T_closest > T_des:
config_bestHigh = closest
config_bestLow = self.config_table[T_config_table[i - 1, 1]]
T_bestHigh = T_closest
T_bestLow = np.nanprod(T_set * config_bestLow)
return config_bestLow, config_bestHigh, T_bestLow, T_bestHigh
def _ts_prod(x1, window):
result = np.nanprod(x1[:, -window:], axis=1)
for i in range(1, x1.shape[1] - window):
result = np.column_stack(
[np.nanprod(x1[:, -window - i:-i], axis=1), result])
for i in range(x1.shape[1] - window, x1.shape[1]):
result = np.column_stack([result[:, 0], result])
return result
def absd(eff):
arr = []
for yrs in range(11,19):
for i in range(eff.shape[0]):
if eff.loc[i, f'pc_{yrs}'] > 1:
arr.append(np.nanprod(eff[f'ec_{yrs}'])**(1.0/eff[f'ec_{yrs}'].notnull().sum()))
arr.append(np.nanprod(eff[f'tc_{yrs}'])**(1.0/eff[f'tc_{yrs}'].notnull().sum()))
return arr
def update_consensus():
c = np.nanprod(bin_responses * competencies.reshape(N, -1) +
(1 - bin_responses) * (1 - competencies).reshape(N, -1),
axis=0)
# print(c[:10])
e = np.nanprod(bin_responses * (1 - competencies).reshape(N, -1) +
(1 - bin_responses) * competencies.reshape(N, -1),
axis=0)
# print(e[:10])
return (c / (c + e))
def test_nanprod(self):
# Testing a 1D array
mag_1d = np.array([5., 6., np.nan])
speeds_1d = Quantity.from_units(mag=mag_1d, units='m/s')
units_1d = speeds_1d.units
expected_nanprod_1d = Quantity._from_qty(mag=np.nanprod(mag_1d),
units=units_1d*len(mag_1d))
self.assertEqual(expected_nanprod_1d, np.nanprod(speeds_1d))
# Testing a 2D array
mag_2d = np.array([[5., 6.], [7., np.nan]])
speeds_2d = Quantity.from_units(mag=mag_2d, units='m/s')
units_2d = speeds_2d.units
# Axis not specified
expected_nanprod_2d = Quantity._from_qty(mag=np.nanprod(mag_2d),
units=units_2d*mag_2d.size)
self.assertEqual(expected_nanprod_2d, np.nanprod(speeds_2d))
# Axis = 0
axis = 0
expected_nanprod_2d = Quantity._from_qty(mag=np.nanprod(mag_2d, axis=axis),
units=units_2d*mag_2d.shape[1])
np.testing.assert_array_equal(expected_nanprod_2d,
np.nanprod(speeds_2d, axis=axis))
# Axis = 1
axis = 1
expected_nanprod_2d = Quantity._from_qty(mag=np.nanprod(mag_2d, axis=axis),
units=units_2d*mag_2d.shape[0])
np.testing.assert_array_equal(expected_nanprod_2d,
np.nanprod(speeds_2d, axis=axis))
def decode(H, c_Rx, globalstd):
mx_iter = 15
l_intrinsic = np.multiply(2 / globalstd**2, c_Rx)
d_bits = [[] for i in range(MODEL)]
for model in selModel:
lin = l_intrinsic
L = np.multiply(H, lin)
indx = np.where(L == 0)
L[indx] = np.nan
if model == 0: # 0 -> original model.
for i in range(mx_iter):
L = np.tanh(L / 2)
L_ = np.nanprod(L, axis=1).reshape(Global.n - Global.k, 1)
L = np.divide(L_, L)
L = 2 * ATANH(L)
lin = (lin + np.nansum(L, axis=0)).reshape(1, Global.n)
L = lin - L
d_bits[model] = demod(lin)
if model == 1: # 1 -> alpha beta model.
for i in range(mx_iter):
S = np.sign(L)
S = np.nanprod(S, axis=1).reshape(Global.n - Global.k, 1)
l = MIN(np.abs(L))
L = np.sign(L / S) * l
L = alpha * L + beta
lin = (lin + np.nansum(L, axis=0)).reshape(1, Global.n)
L = lin - L
d_bits[model] = demod(lin)
if model == 2: # 2 -> min sum model
for i in range(mx_iter):
S = np.sign(L)
S = np.nanprod(S, axis=1).reshape(Global.n - Global.k, 1)
l = MIN(np.abs(L))
L = np.sign(L / S) * l
lin = (lin + np.nansum(L, axis=0)).reshape(1, Global.n)
L = lin - L
d_bits[model] = demod(lin)
if model == 3: # 3 -> approximation model.
for i in range(mx_iter):
L = tanh_mine(L / 2)
L_ = np.nanprod(L, axis=1).reshape(Global.n - Global.k, 1)
L = np.divide(L_, L)
L = 2 * atanh_mine(L)
lin = (lin + np.nansum(L, axis=0)).reshape(1, Global.n)
L = lin - L
d_bits[model] = demod(lin)
if model == 4: # 4 -> default model
d_bits[model] = demod(l_intrinsic)
return np.array(d_bits)
async def _update_active_transmission(self):
"""Re-calculate transmission_actual based on working filters."""
config = tuple(self.active_config.value)
offset = self.parent.first_filter
transm = np.zeros_like(config) * np.nan
transm3 = np.zeros_like(config) * np.nan
for idx, filt in self.active_filters.items():
zero_index = idx - offset
if State(config[zero_index]).is_inserted:
transm[zero_index] = filt.transmission.value
transm3[zero_index] = filt.transmission_3omega.value
await self.transmission_actual.write(np.nanprod(transm))
await self.transmission_3omega_actual.write(np.nanprod(transm3))
def test_sequences(net_study):
net = net_study
c_study = net.c.copy()
# all possible recall sequences
n_item = 3
sequences = []
for i in range(n_item + 1):
sequences.extend(list(permutations(range(n_item), i)))
B = 0.8
T = 10
X1 = 0.05
X2 = 1
p_stop = cmr.p_stop_op(n_item, X1, X2)
p = np.empty((len(sequences), n_item + 1))
p[:] = np.nan
for i, recalls in enumerate(sequences):
net.c = c_study.copy()
p_recalls = net.p_recall(('task', 'item'), recalls, 'task', B, T,
p_stop)
p[i, :len(p_recalls)] = p_recalls
# probability of any recall sequence should be 1
p_any = np.sum(np.nanprod(p, 1))
np.testing.assert_allclose(p_any, 1)
def maximum_likelihood_fig(testmag, testmagerr, meanmag, posvar):
''' Function that calculates the maximum likelihood variance for a single
source and plots the corresponding likelihood curce with error bars marked.
Inputs:
testmag = array of magnitudes/fluxes (i.e. the light curve) to test
testmagerr = array of corresponding errors
meanmag = mean of the lightcurve/test value for light curve being flat
posvar = array of sigmas to test for maximum likelihood
Outputs:
sig = maximum likelihood sigma for the inputted light curve
err = the error on sig according to the likelihood curve
'''
# Calculate likelihood curve
L = np.array([np.nanprod((np.exp((-0.5*((testmag - meanmag)**2))/(
testmagerr**2 + testsig**2)))/(((2*np.pi)**0.5)*
(testmagerr**2 + testsig**2)**0.5)) for testsig in posvar])
sig = float(posvar[L==np.nanmax(L)][0]) #sigma value at max L
err = np.sqrt(np.average((posvar-np.average(posvar, weights=L))**2, weights=L))
plt.figure()
plt.plot(posvar, L)
plt.vlines(sig, np.min(L), np.max(L))
plt.vlines(sig+err, np.min(L), np.max(L))
return sig, err
def maximum_likelihood(testmag, testmagerr, meanmag, posvar, n=None, printn=10):
''' Function that calculates the maximum likelihood variance for a single
source. Has the capability to print a counter as it progresses as is slow
to run over a full catalogue.
Inputs:
testmag = array of magnitudes/fluxes (i.e. the light curve) to test
testmagerr = array of corresponding errors
meanmag = mean of the lightcurve/test value for light curve being flat
posvar = array of sigmas to test for maximum likelihood
n = submitted counter for how many times the function has run. Default
is None as do not usually want the counter
printn = at what multiple of n to print a counter. Default is 10
Outputs:
sig = maximum likelihood sigma for the inputted light curve
err = the error on sig according to the likelihood curve
'''
if n != None and n%printn == 0:
print(n)
# Calculate likelihood curve
L = np.array([np.nanprod((np.exp((-0.5*((testmag - meanmag)**2))/(
testmagerr**2 + testsig**2)))/(((2*np.pi)**0.5)*
(testmagerr**2 + testsig**2)**0.5)) for testsig in posvar])
sig = float(posvar[L==np.nanmax(L)][0]) #sigma value at max L
if np.sum(L) == 0:
return sig, np.nan
else:
err = np.sqrt(np.average((posvar-np.average(posvar, weights=L))**2, weights=L))
return sig, err
def cum_returns_final_1d_nb(returns: tp.Array1d,
start_value: float = 0.) -> float:
"""Total return."""
out = np.nanprod(returns + 1.)
if start_value == 0.:
return out - 1.
return out * start_value
def predict(self, X, a=None, b=None, k=None, c=None, d=None):
"""
X is N x M where N is # of guides, and M is max # annotations
"""
if a is None: a = self.maximum['a']
if b is None: b = self.maximum['b']
if k is None: k = self.maximum['k']
assert c is None
assert d is None
warpedX = self.warp_inputs(a, b, X)
if self.combiner == "nb":
pass
elif self.combiner == "nb_modulated":
num_annot = np.sum(~np.isnan(X), axis=1)
modulation = 1.0/num_annot**k
modulation = np.tile(modulation, [6,1]).T
warpedX = warpedX**modulation
else:
raise Exception()
assert np.nanmin(warpedX) > 0.0
assert np.nanmax(warpedX) < 1.0
return np.nanprod(warpedX, axis=1)[:, None]
def featurize(self, X, training=False):
f_dict = {}
f_dict["f_prod"] = np.nanprod(X, axis=1)[:, None]
f_dict["f_sum"] = np.nansum(X, axis=1)[:, None]
f_dict["f_mean"] = np.nanmean(X, axis=1)[:, None]
f_dict["f_max"] = np.nanmax(X, axis=1)[:, None]
f_dict["f_min"] = np.nanmin(X, axis=1)[:, None]
f_dict["f_count"] = X.shape[1] - np.sum(np.isnan(X), axis=1)[:, None]
# now make each feature interact with the counts:
if False:
for key in f_dict.keys():
if not (key=="count"):
f_dict[key + "_count"] = np.multiply(f_dict["f_count"], f_dict[key])
self.ordered_keys = []
f_concat = None
for key in f_dict.keys():
self.ordered_keys.append(key)
dat = f_dict[key]
if self.normalize_feat:
#print "normalizing features"
if training:
self.mean = np.mean(dat)
self.std = np.mean(dat)
dat = (dat - self.mean) / self.std
if f_concat is None:
f_concat = dat
else:
f_concat = np.concatenate((f_concat, dat), axis=1)
return f_concat
def cross_covariance(self, i: int, j: int, h: np.ndarray) -> np.ndarray:
if i > j:
# swap indices (cross-covariance is symmetric)
i, j = j, i
return (self.params.rho.values[i, j] *
np.nanprod(self.params.sigma.values) *
self.correlation(i, j, h))
def __matmul__(self, other):
if isinstance(other, Option):
return self @ Domain(other)
if self._is_array_option():
that = self._to_scalar_product()
else:
that = self
if other._is_array_option():
other = other._to_scalar_product()
if that._is_scalar_product() and other._is_scalar_product():
if len(that.cubes) == len(other.cubes):
cubes = [
cube_1 + cube_2
for cube_1, cube_2 in zip(that.cubes, other.cubes)
]
weights = np.nanprod(np.stack([that.weights, other.weights]),
axis=0)
nan_mask = np.logical_and(np.isnan(that.weights),
np.isnan(other.weights))
weights[nan_mask] = np.nan
return Domain(domain=cubes, weights=weights)
raise ValueError("The numbers of domain cubes must conincide.")
def expectation(self, imgs):
E_z_nc = np.ndarray((imgs.shape[2], self.n_classes))
for n in range(imgs.shape[2]):
for c in range(self.n_classes):
# if (self.mu <= 0.).any():
# print("BAAAAAAAA")
# E_z_nc[n, c] = np.log(self.pi[c])
# E_z_nc[n, c] += np.sum(np.multiply(np.log(self.mu[:,:,c]), imgs[:,:, n] ))
# E_z_nc[n, c] += np.sum(np.multiply(np.log(1 - self.mu[:,:,c]), 1 - imgs[:,:, n] ))
E_z_nc[n, c] = np.nanprod(
np.multiply(
np.power(self.mu[:, :, c], imgs[:, :, n]),
np.power((1 - self.mu[:, :, c]), (1 - imgs[:, :, n]))))
# plt.imshow(np.multiply(
# np.power( self.mu[:,:,c], imgs[:,:, n] ),
# np.power( (1 - self.mu[:, :, c]), (1 - imgs[:,:, n]) )
# ))
# plt.colorbar()
# print(E_z_nc[n,c])
# plt.show()
E_z_nc[n, c] *= self.pi[c]
# E_z_nc = np.log(E_z_nc)
for c in range(self.n_classes):
# E_z_nc[:,c] -= np.log(np.sum(np.exp(E_z_nc), axis=1))
E_z_nc[:, c] /= np.sum(E_z_nc, axis=1)
return np.nan_to_num(E_z_nc)
def naive_bayes(data):
naive_probs = np.empty((10))
for j in range(0, 10):
nz_values = data[j]
c = np.nanprod(nz_values * 500, dtype=np.float64)
naive_probs[j] = c
return naive_probs
def cum_returns_final(returns, starting_value=2000):
"""
Compute total returns from simple returns.
Parameters
----------
returns : pd.DataFrame, pd.Series, or np.ndarray
Noncumulative simple returns of one or more timeseries.
starting_value : float, optional
The starting returns.
Returns
-------
total_returns : pd.Series, np.ndarray, or float
If input is 1-dimensional (a Series or 1D numpy array), the result is a
scalar.
"""
if len(returns) == 0:
return np.nan
result = np.nanprod(returns + 1, axis=0)
if starting_value == 0:
result -= 1
else:
result *= starting_value
return result
def join_count_tables(table_info, parsed_join_clauses, count_tables, join_how):
g = make_join_graph(parsed_join_clauses)
df_ret = None
for edge in nx.dfs_edges(g, source=parsed_join_clauses[0][0]):
t1, t2 = edge
join_columns = g.edges[edge]["join_columns"]
cs1 = join_columns[t1] # columns to join
cs2 = join_columns[t2] # columns to join
if df_ret is None:
df_ret = count_tables[t1].add_prefix(t1 + ":")
log.info("Joining {} and {} on {}".format(
t1, t2, ", ".join([c1 + "=" + c2 for c1, c2 in zip(cs1, cs2)])))
# NOTE: Since we are traversing the join graph in a DFS order, it is
# guaranteed that at this point `df_ret` already contains `t1.c1`.
df_ret = df_ret.merge(
count_tables[t2].add_prefix(t2 + ":"),
how=join_how,
left_on=["{}:{}".format(t1, c) for c in cs1],
right_on=["{}:{}".format(t2, c) for c in cs2],
)
# NOTE: `np.nanprod()` treats `np.nan` as 1.
df_ret["cnt"] = np.nanprod([df_ret[f"{t}:cnt"] for t in table_info],
axis=0)
return df_ret
def time_dependent_terms(k):
current_filter = sparse_filters.copy()
values = list(predicted_values[k]) + list(
not_predicted_time_dependent[k])
for i, val in enumerate(values):
current_filter[:, i * max_degree:(i + 1) * max_degree] *= val
return np.nanprod(current_filter, axis=1)
def simulate(self):
if self.HistoryRate is not None:
RateMean = np.nanprod(1 + self.HistoryRate)**(
self.NoP / self.HistoryRate.shape[0]) - 1 # 收益率的历史均值
RateSigma = np.nanstd(self.HistoryRate,
ddof=1) * self.NoP**0.5 # 收益率的历史波动率
else:
RateMean = self.RateMean
RateSigma = self.RateSigma
np.random.seed(self.Seed)
Rate = np.random.normal(loc=RateMean,
scale=RateSigma,
size=(self.NPeriod, self.NSample))
if not self.DropIllegal:
return Rate
Mask = (Rate <= -1)
nIllegal = np.sum(Mask)
while nIllegal > 0:
self._Logger.debug("There are %d illegal samples, try again!" %
(nIllegal, ))
Rate[Mask] = np.random.normal(loc=RateMean,
scale=RateSigma,
size=(nIllegal, ))
Mask = (Rate <= 1)
nIllegal = np.sum(Mask)
np.random.seed(None)
return Rate
def pwflrg_lhs_memberhip_fuzzyfied(self, flrg, sample):
vals = []
for ct in range(len(flrg.LHS)): # fuzz in enumerate(sample):
vals.append(
[mv for fset, mv in sample[ct] if fset == flrg.LHS[ct]])
return np.nanprod(vals)
def fire(self, input):
mf_vals = np.zeros(self.weights.shape)+np.nan
for i in range(self.num_inputs):
x = input[i]
# given input, evalate membership degree in each partition
for j in range(len(self.mfs)):
if self.weights[i,j]:
mf_vals[i,j] = self.mfs[j].value(x)
# a rule may not cover all dimensions, i.e.:
# "IF x1 is low THEN ..." does not cover x0
# coverage == 1 -> rule covers this dimension
# coverage == nan -> rule does not cover this dimension
coverage = 1.0 - np.isnan(mf_vals).prod(axis=1)
coverage[coverage==0] = np.nan
# this coeff reflects % of dimensions covered by the rule
coverage_coeff = float(sum(coverage==1)) / coverage.shape[0]
# by multiplying by coverage we exclude 0's
# that result from np.nansum([nan, nan, nan, ...])
# that are in uncovred dimensions
# thus uncovered dimensions are excluded from product
op_or = np.nansum(mf_vals,axis=1) * coverage
op_and = np.nanprod(op_or)
# if rule does not cover all dimensions, its firing str
# is penalized proportionally to # of uncovered dims.
return op_and
def __mul__(self, other):
if isinstance(other, float) and np.isnan(other):
return self
if self.cubes is None:
result = other
elif isinstance(other, (int, float)):
result = self
weights = self.weights
weights[np.isnan(weights)] = 1
result.weights = weights * other
elif isinstance(other, Domain):
if other.cubes is None:
result = self
else:
res = list(product(self.cubes, other.cubes))
res = [item[0] + item[1] for item in res]
pairs = np.array(list(product(self.weights, other.weights)))
weights = np.array([np.nanprod(item) for item in pairs])
nan_mask = np.array([np.isnan(item).all() for item in pairs])
weights[nan_mask] = np.nan
result = Domain(res, weights=weights)
elif isinstance(other, Option):
result = self * Domain(other)
else:
raise TypeError('Arguments must be numeric, Domains or Options')
return result
def combined_likelihood(data, likelihood_function=None, likelihood_kwargs={}):
'''Applies likelihood function to each signal and returns their product
If there isn't a column dimension, just returns the likelihood.
Parameters
----------
data : array_like, shape=(n_signals, ...)
likelihood_function : function
Likelihood function to be applied to each signal.
The likelihood function must take data as its first argument.
All other arguments for the likelihood should be passed
via `likelihood_kwargs`
likelihood_kwargs : dict
Keyword arguments for the likelihood function
Returns
-------
likelihood : array_like, shape=(n_parameters * n_states,)
'''
try:
return np.nanprod(likelihood_function(data, **likelihood_kwargs),
axis=0).squeeze()
except ValueError:
return likelihood_function(data, **likelihood_kwargs).squeeze()
def evaluate_mark_space(test_marks,
training_marks=None,
mark_std_deviation=20):
'''Evaluate the multivariate Gaussian kernel for the mark space
given training marks.
For each mark in the training data (`training_marks`), a univariate
Gaussian is placed with its mean at the value of each mark with
standard deviation `mark_std_deviation`. The product of the Gaussians
along the mark dimension yields a multivariate Gaussian kernel
evaluated at each training spike with a diagonal coviarance matrix.
Parameters
----------
test_marks : array_like, shape=(n_marks,)
The marks to be evaluated
training_marks : shape=(n_training_spikes, n_marks)
The marks for each spike when the animal is moving
mark_std_deviation : float, optional
The standard deviation of the Gaussian kernel in millivolts
Returns
-------
mark_space_estimator : array_like, shape=(n_training_spikes,)
'''
n_training_spikes = training_marks.shape[0]
test_marks = np.tile(test_marks[:, np.newaxis], (1, n_training_spikes)).T
return np.nanprod(_normal_pdf(test_marks,
mean=training_marks,
std_deviation=mark_std_deviation),
axis=1)
def incorporate_scan(self, V, N, trunc_dist, do_plot=False):
"""
Given a range scan, update the signed distance image and the weights to incorporate the new scan.
Parameters
----------
V: ndarray(M, 2)
Points scanned in global coordinates that were actually seen
(non-infinite)
N: ndarray(M, 2)
Array of corresponding normals in global coordinates
trunc_dist: float
Threshold at which to truncate
"""
if V.size == 0:
return
tree = KDTree(V)
distances, indices = tree.query(self.XGrid, k=1)
indices = indices.flatten()
distances = np.reshape(distances, (self.res, self.res))
## Step 1: Compute the Signed distance function
# All the points on V that are closest to the corresponding
# points on XGrid
P = V[indices, :]
N2 = N[indices, :]
sdf = np.sum((self.XGrid - P) * N2, 1)
sdf = np.reshape(sdf, (self.res, self.res))
w = np.zeros_like(sdf)
w[distances < trunc_dist] = 1
## Step 2: Incorporate this signed distance
## function into the overall signed distance function
numerator = np.nanprod(np.array([self.weights, self.SDF]), axis=0)
numerator = numerator + w * sdf
self.weights = w + self.weights
idx = self.weights > 0
self.SDF[idx] = numerator[idx] / self.weights[idx]
self.SDF[self.weights == 0] = np.nan
if do_plot:
sdf[distances >= trunc_dist] = np.nan
vmax = np.max(np.abs(sdf[~np.isnan(sdf)]))
plt.figure(figsize=(15, 5))
plt.subplot(131)
plt.imshow(distances)
plt.gca().invert_yaxis()
plt.colorbar()
plt.title("Euclidean Distances of Nearest Neighbor")
plt.subplot(132)
plt.imshow(sdf, cmap='seismic', vmin=-vmax, vmax=vmax)
plt.gca().invert_yaxis()
plt.colorbar()
plt.title("Signed distance")
plt.subplot(133)
plt.imshow(w)
plt.gca().invert_yaxis()
plt.title("Weights")
plt.colorbar()
plt.show()
def test_nan():
x = np.array([[1, np.nan, 3, 4],
[5, 6, 7, np.nan],
[9, 10, 11, 12]])
d = da.from_array(x, chunks=(2, 2))
assert_eq(np.nansum(x), da.nansum(d))
assert_eq(np.nansum(x, axis=0), da.nansum(d, axis=0))
assert_eq(np.nanmean(x, axis=1), da.nanmean(d, axis=1))
assert_eq(np.nanmin(x, axis=1), da.nanmin(d, axis=1))
assert_eq(np.nanmax(x, axis=(0, 1)), da.nanmax(d, axis=(0, 1)))
assert_eq(np.nanvar(x), da.nanvar(d))
assert_eq(np.nanstd(x, axis=0), da.nanstd(d, axis=0))
assert_eq(np.nanargmin(x, axis=0), da.nanargmin(d, axis=0))
assert_eq(np.nanargmax(x, axis=0), da.nanargmax(d, axis=0))
assert_eq(nanprod(x), da.nanprod(d))
def test_nan():
x = np.array([[1, np.nan, 3, 4],
[5, 6, 7, np.nan],
[9, 10, 11, 12]])
d = da.from_array(x, blockshape=(2, 2))
assert eq(np.nansum(x), da.nansum(d))
assert eq(np.nansum(x, axis=0), da.nansum(d, axis=0))
assert eq(np.nanmean(x, axis=1), da.nanmean(d, axis=1))
assert eq(np.nanmin(x, axis=1), da.nanmin(d, axis=1))
assert eq(np.nanmax(x, axis=(0, 1)), da.nanmax(d, axis=(0, 1)))
assert eq(np.nanvar(x), da.nanvar(d))
assert eq(np.nanstd(x, axis=0), da.nanstd(d, axis=0))
assert eq(np.nanargmin(x, axis=0), da.nanargmin(d, axis=0))
assert eq(np.nanargmax(x, axis=0), da.nanargmax(d, axis=0))
with ignoring(AttributeError):
assert eq(np.nanprod(x), da.nanprod(d))
def array_nanprod(arr):
return np.nanprod(arr)
def time_nanprod(self, array_size, percent_nans):
np.nanprod(self.arr)
def test_nanprod(self):
tgt = np.prod(self.mat)
for mat in self.integer_arrays():
assert_equal(np.nanprod(mat), tgt)
def msssim(
img0,
img1,
nlevels=5,
sigma=1.2,
L=1.0,
K=(0.01, 0.03),
alpha=4,
beta_gamma=None
):
"""Multi-Scale Structural SIMilarity index (MS-SSIM).
Parameters
----------
img0 : array
img1 : array
Two images for comparison.
nlevels : int
The max number of levels to analyze
sigma : float
Sets the standard deviation of the gaussian filter. This setting
determines the minimum scale at which quality is assessed.
L : scalar
The dynamic range of the data. This value is 1 for float
representations and 2^bitdepth for integer representations.
K : 2-tuple
A list of two constants which help prevent division by zero.
alpha : float
The exponent which weights the contribution of the luminance term.
beta_gamma : list
The exponent which weights the contribution of the contrast and
structure terms at each level.
Returns
-------
metrics : dict
A dictionary with image quality information organized by scale.
``metric[scale] = (mean_quality, quality_map)``
The valid range for SSIM is [-1, 1].
References
----------
Multi-scale Structural Similarity Index (MS-SSIM)
Z. Wang, E. P. Simoncelli and A. C. Bovik, "Multi-scale structural
similarity for image quality assessment," Invited Paper, IEEE Asilomar
Conference on Signals, Systems and Computers, Nov. 2003
"""
_full_reference_input_check(img0, img1, sigma, nlevels, L)
# The relative imporance of each level as determined by human experiment
if beta_gamma is None:
beta_gamma = np.array([0.0448, 0.2856, 0.3001, 0.2363, 0.1333]) * 4
assert nlevels < 6, "Not enough beta_gamma weights for more than 5 levels"
scales = np.zeros(nlevels)
maps = [None] * nlevels
scale, luminance, ssim_map = ssim(
img0,
img1,
sigma=sigma,
L=L,
K=K,
scale=sigma,
alpha=alpha,
beta_gamma=0
)
original_shape = np.array(img0.shape)
for level in range(0, nlevels):
scale, ssim_mean, ssim_map = ssim(
img0,
img1,
sigma=sigma,
L=L,
K=K,
scale=sigma,
alpha=0,
beta_gamma=beta_gamma[level]
)
# Always take the direct ratio between original and downsampled maps
# to prevent resizing mismatch for odd sizes
ratio = original_shape / np.array(ssim_map.shape)
scales[level] = scale * ratio[0]
maps[level] = ndimage.zoom(ssim_map, ratio, prefilter=False, order=0)
if level == nlevels - 1:
break
# Downsample (using ndimage.zoom to prevent sampling bias)
# Images become half the size
img0 = ndimage.zoom(img0, 0.5)
img1 = ndimage.zoom(img1, 0.5)
map = luminance * np.nanprod(maps, axis=0)
ms_ssim_mean = np.nanmean(map)
return scales, ms_ssim_mean, map
def stack_prod(arrs, nodata=None):
"""see stack_stats"""
a = check_stack(arrs)
if nodata is not None:
a = mask_stack(a, nodata=nodata)
return np.nanprod(a, axis=0)
