def helper(x):
filter_lower = x < lower_bound
x[filter_lower] = lower_bound + reflective_strength
filter_upper = x > upper_bound
x[filter_upper] = upper_bound - reflective_strength
return x, np.any(filter_lower) or np.any(filter_upper)
def X_hat(self, ge_dict):
"""
Parameters
----------
ge_dict : dictionary
Dictionary storing GE inputs and outputs. See unwrap_ge_dict for keys.
Returns
-------
matrix
N times N matrix of changes in trade flows.
"""
w_hat, P_hat, E_hat, tau_hat = ge_dict["w_hat"], ge_dict["P_hat"], ge_dict["E_hat"], ge_dict["tau_hat"]
if np.any(ge_dict["P_hat"] < 0): # nudge to avoid negative trade solutions
ge_dict["P_hat"][ge_dict["P_hat"] < 0] = .01
if np.any(ge_dict["w_hat"] < 0):
ge_dict["w_hat"][ge_dict["w_hat"] < 0] = .01
A = np.power(tau_hat, -self.theta-1)
B = np.dot(np.diag(np.power(w_hat, 1-self.beta-self.theta)), np.diag(np.power(P_hat, self.beta-self.theta)))
C = np.dot(np.diag(np.power(P_hat, self.theta)), np.diag(E_hat))
AB = np.dot(A, B)
XhatT = np.dot(AB.T, C)
Xhat = XhatT.T
return(Xhat)
def vData( self, U, V, node, edges=None, ndim=None ):
# THESE MUST NOT MODIFY U OR V!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
# VERY IMPORTANT!!!!!! PROBABLY ENFORCE THIS SOMEHOW IN THE FURURE
V_row, V_col, V_data = V
if( ~np.any( np.in1d( V_row, node ) ) ):
# If the node isn't in the V object (node is a leaf)
ans = [ np.array( [] ) ]
elif( edges is None ):
# Return the data over all down edges
ans = self.vDataFromMask( V, np.in1d( V_row, node ) )
elif( isinstance( edges, Iterable ) and len( edges ) > 0 ):
# Return over only certain edges
mask = np.in1d( V_row, node )
for e in edges:
mask &= np.in1d( V_col, e )
ans = self.vDataFromMask( V, mask )
elif( isinstance( edges, Iterable ) and len( edges ) == 0 ):
# This happens when we're not passed a down edge. In this
# case, we should return an empty v value, not a leaf v value
return [ np.array( [] ) ]
else:
# Only looking at one edge
ans = self.vDataFromMask( V, np.in1d( V_col, edges ) )
if( len( ans ) == 0 ):
# If we're looking at a leaf, return all 0s
nVals = 1 if edges is None else len( edges )
ans = []
for _ in range( nVals ):
ans.append( np.array( [] ) )
assert sum( [ 0 if ~np.any( np.isnan( v ) ) else 1 for v in ans ] ) == 0, ans
return ans
def __init__(self, populations, baba, z_score, n_snps):
for arr in (baba, z_score, n_snps):
if np.any(arr.shape != np.array([len(populations)] * 4)):
raise ValueError("array has wrong dimension")
equiv_perms = get_permutations("ABBA", "ABBA") & get_permutations(
"BABA", "BABA")
opposite_perms = get_permutations("ABBA", "BABA") & get_permutations(
"BABA", "ABBA")
if not is_symmetric(z_score, equiv_perms) or not is_symmetric(
z_score, opposite_perms, antisymm=True):
raise ValueError("Z-scores not symmetric")
if not is_symmetric(n_snps, list(it.permutations(range(4)))):
raise ValueError("n_snps not symmetric")
if not is_symmetric(baba, get_permutations("BABA", "BABA")):
raise ValueError("BABA not symmetric")
self.populations = populations
self.baba = baba
self.n_snps = n_snps
self.z_score = z_score
if np.any((self.z_score < 0) & (self.baba > self.abba)) or np.any(
(self.z_score > 0) & (self.baba < self.abba)):
raise ValueError("z_score should have same sign as baba-abba")
def _expected_sfs(demography, configs, folded, error_matrices):
if np.any(configs.sampled_n != demography.sampled_n) or np.any(
configs.sampled_pops != demography.sampled_pops):
raise ValueError(
"configs and demography must have same sampled_n, sampled_pops. Use Demography.copy() or ConfigList.copy() to make a copy with different sampled_n."
)
vecs, idxs = configs._vecs_and_idxs(folded)
if error_matrices is not None:
vecs = _apply_error_matrices(vecs, error_matrices)
vals = expected_sfs_tensor_prod(vecs, demography)
sfs = vals[idxs['idx_2_row']]
if folded:
sfs = sfs + vals[idxs['folded_2_row']]
denom = vals[idxs['denom_idx']]
for i in (0, 1):
denom = denom - vals[idxs[("corrections_2_denom", i)]]
#assert np.all(np.logical_or(vals >= 0.0, np.isclose(vals, 0.0)))
return sfs, denom
def flat_indices(self, folded_bool, free=None):
# If no indices are specified, save time and return an empty array.
if not np.any(folded_bool):
return np.array([], dtype=int)
free = self._free_with_default(free)
shape_ok, err_msg = self._validate_folded_shape(folded_bool)
if not shape_ok:
raise ValueError(err_msg)
if not free:
folded_indices = self.fold(np.arange(self.flat_length(False),
dtype=int),
validate_value=False,
free=False)
return folded_indices[folded_bool]
else:
# Every element of a particular simplex depends on all
# the free values for that simplex.
# The simplex is the last index, which moves the fastest.
indices = []
offset = 0
free_simplex_length = self.__simplex_size - 1
array_ranges = (range(n) for n in self.__array_shape)
for ind in itertools.product(*array_ranges):
if np.any(folded_bool[ind]):
free_inds = np.arange(offset * free_simplex_length,
(offset + 1) * free_simplex_length,
dtype=int)
indices.append(free_inds)
offset += 1
if len(indices) > 0:
return np.hstack(indices)
else:
return np.array([])
def validate_folded(self, folded_val, validate_value=None):
shape_ok, err_msg = self._validate_folded_shape(folded_val)
if not shape_ok:
raise ValueError(err_msg)
if validate_value is None:
validate_value = self.default_validate
if validate_value:
if np.any(folded_val < 0):
return False, 'Some values are negative.'
simplex_sums = np.sum(folded_val, axis=-1)
if np.any(np.abs(simplex_sums - 1) > 1e-12):
return False, 'The simplexes do not sum to one.'
return True, ''
def getIcase(par1type, par2type, checks=True):
"""Generate vector describing the combination of input parameters.
Options for `par1type` and `par2type`:
* `1` = total alkalinity
* `2` = dissolved inorganic carbon
* `3` = pH
* `4` = partial pressure of CO2
* `5` = fugacity of CO2
* `6` = carbonate ion
* `7` = bicarbonate ion
* `8` = aqueous CO2
* `9` = dry mole fraction of CO2
`Icase` is `10*parXtype + parYtype` where `parXtype` is whichever of `par1type` or
`par2type` is greater.
Noting that a pair of any two from pCO2, fCO2, xCO2 CO2(aq) is not allowed, the
valid `Icase` options are:
12, 13, 14, 15, 16, 17, 18, 19,
23, 24, 25, 26, 27, 28, 29,
34, 35, 36, 37, 38, 39,
46, 47,
56, 57,
67, 68, 69,
78, 79.
The optional argument `checks` allows you to decide whether the function should test
the validity of the entered combinations or not.
"""
# Check validity of separate `par1type` and `par2type` inputs
if checks:
assert np.all(
np.isin(par1type, [1, 2, 3, 4, 5, 6, 7, 8, 9])
& np.isin(par2type, [1, 2, 3, 4, 5, 6, 7, 8, 9])
), "All `par1type` and `par2type` values must be integers from 1 to 9."
assert ~np.any(
par1type == par2type
), "`par1type` and `par2type` must be different from each other."
# Combine inputs into `Icase` and check its validity
Icase = np.where(
par1type < par2type, 10 * par1type + par2type, par1type + 10 * par2type
)
if checks:
assert ~np.any(
np.isin(Icase, [45, 48, 49, 58, 59, 89])
), "Combinations of pCO2, fCO2, xCO2 and CO2(aq) are not valid argument pairs."
return Icase
def vData( self, U, V, node, edges=None ):
# THESE MUST NOT MODIFY U OR V!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
# VERY IMPORTANT!!!!!! PROBABLY ENFORCE THIS SOMEHOW IN THE FURURE
V_row, V_col, _ = V
if( self.inFeedbackSet( node, is_partial_graph_index=True ) ):
# This is going to be empty because by construction,
# if a node is in the fbs, all the information from
# going down the down edges can be gained by going
# up an up edge.
if( edges is None ):
return []
elif( isinstance( edges, Iterable ) ):
return []
else:
return fbsData( np.array( [] ), -1 )
if( ~np.any( np.in1d( V_row, node ) ) ):
# If the node isn't in the V object (node is a leaf)
ans = [ fbsData( np.array( [] ), -1 ) ]
elif( edges is None ):
# Return the data over all down edges
ans = self.vDataFromMask( V, np.in1d( V_row, node ) )
elif( isinstance( edges, Iterable ) and len( edges ) > 0 ):
# Return over only certain edges
mask = np.in1d( V_row, node )
for e in edges:
mask &= np.in1d( V_col, e )
ans = self.vDataFromMask( V, mask )
elif( isinstance( edges, Iterable ) and len( edges ) == 0 ):
# This happens when we're not passed a down edge. In this
# case, we should return an empty v value, not a leaf v value
return [ fbsData( np.array( [] ), -1 ) ]
else:
# Only looking at one edge
ans = self.vDataFromMask( V, np.in1d( V_col, edges ) )
if( len( ans ) == 0 ):
# If we're looking at a leaf, return all 0s
nVals = 1 if edges is None else len( edges )
ans = []
for _ in range( nVals ):
ans.append( fbsData( np.array( [] ), -1 ) )
for v in ans:
data = v.data
assert np.any( np.isnan( data ) ) == False, data
return ans
def simple_hmc(U, K, grad_U, mass, inv_mass, iters, q_0, integrator):
D = q_0.shape[1]
q_hist = []
q_hist.append(q_0.reshape(D, ))
accepted_num = 0
cur_q = q_0.copy()
for i in range(iters):
nxt_q = integrator(U,
K,
grad_U,
cur_q,
mass,
inv_mass,
L=200,
eps=0.05)
if np.any(nxt_q != cur_q):
accepted_num += 1
q_hist.append(np.asarray(nxt_q.reshape(D, )))
cur_q = nxt_q
if i % 50 == 0:
print("progressed {}%".format(i * 100 / iters))
print("The acceptance rate is {}".format(accepted_num / iters))
#corrplot(np.asarray(q_hist))
return q_hist
def adaptive_hmc(U, K, grad_U, mass, inv_mass, iters, q_0, integrator):
D = q_0.shape[1]
q_hist = []
q_hist.append(q_0.reshape(D, ))
accepted_num = 0
cur_q = q_0.copy()
for i in range(iters):
nxt_q = integrator(U,
K,
grad_U,
cur_q,
mass,
inv_mass,
L=200,
eps=0.05)
if np.any(nxt_q != cur_q):
accepted_num += 1
q_hist.append(np.asarray(nxt_q.reshape(D, )))
cur_q = nxt_q
if i % 50 == 0:
print("progressed {}%".format(i * 100 / iters))
if i % 1000 and len(q_hist) > 200:
# every 1000 iterations, we re-estimate the covariance of estimated target
mass = adaptive_metric(q_hist[-200:])
inv_mass = np.linalg.inv(mass + np.identity(D) * 1e-5)
print("The acceptance rate is {}".format(accepted_num / iters))
#corrplot(np.asarray(q_hist))
return q_hist
def pca_with_imputation(D, datas, masks, num_iters=20):
if isinstance(datas, (list, tuple)) and isinstance(masks, (list, tuple)):
data = np.concatenate(datas)
mask = np.concatenate(masks)
if np.any(~mask):
# Fill in missing data with mean to start
fulldata = data.copy()
for n in range(fulldata.shape[1]):
fulldata[~mask[:, n], n] = fulldata[mask[:, n], n].mean()
for itr in range(num_iters):
# Run PCA on imputed data
pca = PCA(D)
x = pca.fit_transform(fulldata)
# Fill in missing data with PCA predictions
pred = pca.inverse_transform(x)
fulldata[~mask] = pred[~mask]
else:
pca = PCA(D)
x = pca.fit_transform(data)
# Unpack xs
xs = np.split(x, np.cumsum([len(data) for data in datas])[:-1])
assert len(xs) == len(datas)
assert all([x.shape[0] == data.shape[0] for x, data in zip(xs, datas)])
return pca, xs
def wishart_updates(x, mu, mu2, e_z, prior_mu, prior_inv_wishart_scale, prior_wishart_dof, kappa):
k_approx = np.shape(mu)[0]
prior_mu_tile = np.tile(prior_mu, (k_approx, 1))
cross_term1 = np.dot(mu.T, prior_mu_tile)
prior_normal_term = kappa * (np.sum(mu2, axis = 0)\
- cross_term1 - cross_term1.T \
+ k_approx * np.outer(prior_mu, prior_mu))
predictive = np.dot(e_z, mu)
outer_mu = np.array([np.outer(mu[i,:], mu[i,:]) for i in range(k_approx)])
z_sum = np.sum(e_z, axis = 0)
cross_term2 = np.dot(x.T, predictive)
data_lh_term = np.dot(x.T, x) - cross_term2 - cross_term2.T\
+ np.einsum('kij, k -> ij', outer_mu, z_sum)
inv_scale_update = prior_inv_wishart_scale + prior_normal_term + data_lh_term
scale_update = np.linalg.inv(inv_scale_update)
dof_update = prior_wishart_dof + np.shape(x)[0] + k_approx
# there's some numerical issue in which the update is not exactly symmetric
if np.any(np.abs(scale_update - scale_update.T) >= 1e-10):
print('wishart scale not symmetric?')
print(scale_update - scale_update.T)
scale_update = 0.5 * (scale_update + scale_update.T)
return scale_update, np.array([dof_update])
def preprocessData(self, data_graphs):
super(_graphHMMMixin, self).updateGraphs(data_graphs)
self.possible_latent_states = {}
total_nodes = 0
for data_graph in data_graphs:
for node, state in data_graph.possible_latent_states.items():
self.possible_latent_states[total_nodes + node] = state
total_nodes += len(data_graph.nodes)
ys = []
for graph in data_graphs:
ys.extend([
graph.data[node] if graph.data[node] is not None else np.nan
for node in graph.nodes
])
self.ys = ys
if (hasattr(self, 'emission_dist')):
self.L_set = True
ys = np.array(ys).T
self.L = np.array([
self.emission_dist[:, y] if not np.any(np.isnan(y)) else
np.zeros_like(self.emission_dist[:, 0]) for y in ys
]).sum(axis=0).T
def preprocessData(self, data_graphs):
super().updateGraphs(data_graphs)
self.possible_latent_states = {}
total_nodes = 0
for data_graph, fbs in data_graphs:
for node, state in data_graph.possible_latent_states.items():
self.possible_latent_states[total_nodes + node] = state
total_nodes += len(data_graph.nodes)
ys = []
for graph, fbs in data_graphs:
ys.extend([
graph.data[node] if graph.data[node] is not None else np.nan
for node in graph.nodes
])
self.ys = np.array(ys)
if (hasattr(self, 'emission_dist')):
self.L_set = True
ys = np.array(ys).T
assert ys.ndim == 2, 'If there is only 1 measurement, add an extra dim!'
self.L = np.array([
self.emission_dist[:, y] if not np.any(np.isnan(y)) else
np.zeros_like(self.emission_dist[:, 0]) for y in ys
]).sum(axis=0).T
def updateNatParams(self,
log_initial_dist,
log_transition_dist,
log_emission_dist,
data_graphs=None,
check_parameters=True,
compute_marginal=True):
if (check_parameters):
self.parameterCheck(log_initial_dist, log_transition_dist,
log_emission_dist)
self.K = log_initial_dist.shape[0]
self.pi0 = log_initial_dist
self.pis = {}
for log_dist in log_transition_dist:
ndim = log_dist.ndim
self.pis[ndim] = log_dist
self.emission_dist = log_emission_dist
self.L_set = False
if (data_graphs is not None):
self.preprocessData(data_graphs)
self.clearCache()
if (hasattr(self, 'ys') and self.L_set == False):
self.L_set = True
ys = np.array(self.ys).T
assert ys.ndim == 2, 'If there is only 1 measurement, add an extra dim!'
self.L = np.array([
self.emission_dist[:, y] if not np.any(np.isnan(y)) else
np.zeros_like(self.emission_dist[:, 0]) for y in ys
]).sum(axis=0).T
def _check_bad_constraint(self, y_hat, slack, old_constraints):
if slack < 1e-5:
return True
y_hat_plain = unwrap_pairwise(y_hat)
already_active = np.any([
True for y__, _, _ in old_constraints
if np.all(y_hat_plain == unwrap_pairwise(y__))
])
if already_active:
return True
# "smart" stopping criterion
# check if most violated constraint is more violated
# than previous ones by more then eps.
# If it is less violated, inference was wrong/approximate
if self.check_constraints:
for con in old_constraints:
# compute slack for old constraint
slack_tmp = max(con[2] - np.dot(self.w, con[1]), 0)
if self.verbose > 5:
print("slack old constraint: %f" % slack_tmp)
# if slack of new constraint is smaller or not
# significantly larger, don't add constraint.
# if smaller, complain about approximate inference.
if slack - slack_tmp < -1e-5:
if self.verbose > 0:
print("bad inference: %f" % (slack_tmp - slack))
if self.break_on_bad:
raise ValueError("bad inference: %f" %
(slack_tmp - slack))
return True
return False
def renyii(pk0, pk1, a):
"""
Compute the renyii divergence between two Gaussian distributions.
"""
# Check dimensions
assert (pk0.S.shape == pk1.S.shape)
# Check diagonal
p0S_is_diag = np.all(np.diag(np.diag(pk0.S)) == pk0.S)
p1S_is_diag = np.all(np.diag(np.diag(pk1.S)) == pk1.S)
Sa = (1 - a) * pk0.S + a * pk1.S
# make sure eigenvalues are positive
if np.any(np.isfinite(Sa) == 0):
print(Sa)
w, v = np.linalg.eig(Sa)
#assert(np.all(w > 0))
assert np.linalg.det(Sa) != 0
#if np.linalg.det(Sa) == 0:
# print Sa
# return float('Inf')
dm = pk1.m - pk0.m
# Use precise computation for diagonal covariance matrices
if p0S_is_diag and p1S_is_diag:
r = a / 2. * np.dot(np.dot(dm, np.linalg.inv(Sa)), dm) + \
(np.sum(np.log(np.diag(Sa))) - (1-a)*np.sum(np.log(np.diag(pk0.S))) - a*np.sum(np.log(np.diag(pk1.S)))) \
/ (1 - a) / 2.
else:
r = a / 2. * np.dot(np.dot(dm, np.linalg.inv(Sa)), dm) + \
(np.log(np.linalg.det(Sa)) - (1-a)*np.log(np.linalg.det(pk0.S)) - a*np.log(np.linalg.det(pk1.S))) \
/ (1 - a) / 2.
#assert(r > -1e-10)
return max(r, 0)
def build_detection_coadd(sed, bg_rms, observation):
"""Build a channel weighted coadd to use for source detection
Parameters
----------
sed: array
SED at the center of the source.
bg_rms: array
Background RMS in each channel in observation.
observation: `~scarlet.observation.Observation`
Observation to use for the coadd.
Returns
-------
detect: array
2D image created by weighting all of the channels by SED
bg_cutoff: float
The minimum value in `detect` to include in detection.
"""
C = len(sed)
if np.any(bg_rms <= 0):
raise ValueError("bg_rms must be greater than zero in all channels")
positive = [c for c in range(C) if sed[c] > 0]
positive_img = [observation.images[c] for c in positive]
positive_bgrms = np.array([bg_rms[c] for c in positive])
weights = np.array([sed[c] / bg_rms[c] ** 2 for c in positive])
jacobian = np.array([sed[c] ** 2 / bg_rms[c] ** 2 for c in positive]).sum()
detect = np.einsum("i,i...", weights, positive_img) / jacobian
# thresh is multiple above the rms of detect (weighted variance across channels)
bg_cutoff = np.sqrt((weights ** 2 * positive_bgrms ** 2).sum()) / jacobian
return detect, bg_cutoff
def P_hat(self, ge_dict):
"""
Parameters
----------
ge_dict : dictionary
Dictionary storing GE inputs and outputs. See unwrap_ge_dict for keys.
Returns
-------
vector
N times 1 vector of price changes
"""
w_hat, P_hat, tau_hat = ge_dict["w_hat"], ge_dict["P_hat"], ge_dict["tau_hat"]
if np.any(ge_dict["P_hat"] < 0): # nudge to avoid negative trade solutions
ge_dict["P_hat"][ge_dict["P_hat"] < 0] = .01
A = self.lambda_pc * np.power(tau_hat,-self.theta)
b = np.power(w_hat, 1-self.beta-self.theta) * np.power(P_hat, self.beta-self.theta)
Phat_int = np.dot(A, b)
Phat = np.power(Phat_int, -1/self.theta)
return(Phat)
def parameter_optimization(self, ctl, iters=100):
# worst-case parameter optimization
beta = 1e16 * np.ones((1, ))
beta, _, _ = self.parameter_dual_optimization(beta, ctl, iters=iters)
agcost = self.parameter_augment_cost(beta)
# initial adversial xdist. with policy xdist.
q_xdist = deepcopy(self.xdist)
# first iteration to establish initial conv_kl
param, _, _ = self.parameter_backward_pass(beta, agcost, q_xdist, ctl)
p_xdist, _, _ = self.cubature_forward_pass(ctl, param)
# convergence of inner loop
xdist_kl = self.gaussians_kldiv(p_xdist.mu, p_xdist.sigma, q_xdist.mu,
q_xdist.sigma, self.dm_state,
self.nb_steps + 1)
while np.any(xdist_kl > 1e-3):
param, _, _ = self.parameter_backward_pass(beta, agcost, q_xdist,
ctl)
p_xdist, _, _ = self.cubature_forward_pass(ctl, param)
# check convergence of loop
xdist_kl = self.gaussians_kldiv(p_xdist.mu, p_xdist.sigma,
q_xdist.mu, q_xdist.sigma,
self.dm_state, self.nb_steps + 1)
# interpolate between distributions
q_xdist.mu, q_xdist.sigma = self.interp_gauss_kl(
q_xdist.mu, q_xdist.sigma, p_xdist.mu, p_xdist.sigma, 1e-1)
return param, beta
def create_pf():
u = np.linspace(-1.2 / np.sqrt(2), 1.2 / np.sqrt(2), endpoint=True, num=60)
v = np.linspace(-1.2 / np.sqrt(2), 1.2 / np.sqrt(2), endpoint=True, num=60)
U, V = np.meshgrid(u, v)
u, v = U.flatten(), V.flatten()
uv = np.stack([u, v]).T
print(f"uv.shape={uv.shape}")
ls = []
for x in uv:
# generate solutions on the Pareto front:
# x = np.array([x1, x1])
f, f_dx = concave_fun_eval(x)
ls.append(f)
ls = np.stack(ls)
po, pf = [], []
for i, x in enumerate(uv):
l_i = ls[i]
if np.any(np.all(l_i > ls, axis=1)):
continue
else:
po.append(x)
pf.append(l_i)
po = np.stack(po)
pf = np.stack(pf)
pf_tri = mtri.Triangulation(po[:, 0], po[:, 1])
tri = mtri.Triangulation(u, v)
return pf, pf_tri, ls, tri
def gamma_logpdf(x, shape, rate):
if np.any(x <= 0):
return -np.infty
return ( np.log(rate) * shape
- sp.special.gammaln(shape)
+ np.log(x) * (shape-1)
- rate * x)
def _wrapped(*args, **kwargs):
"""Wrapped NumPy function"""
tensor_kwargs = {}
if "requires_grad" in kwargs:
tensor_kwargs["requires_grad"] = kwargs.pop("requires_grad")
else:
tensor_args = list(extract_tensors(args))
if tensor_args:
# Unless the user specifies otherwise, if all tensors in the argument
# list are non-trainable, the output is also non-trainable.
# Equivalently: if any tensor is trainable, the output is also trainable.
# NOTE: Use of Python's ``any`` results in an infinite recursion,
# and I'm not sure why. Using ``np.any`` works fine.
tensor_kwargs["requires_grad"] = _np.any([i.requires_grad for i in tensor_args])
# evaluate the original object
res = obj(*args, **kwargs)
if isinstance(res, _np.ndarray):
# only if the output of the object is a ndarray,
# then convert to a PennyLane tensor
res = tensor(res, **tensor_kwargs)
return res
def _pHfromTAVX(TA, VX, totals, k_constants, initialfunc, deltafunc):
"""Calculate pH from total alkalinity and DIC or one of its components using a
Newton-Raphson iterative method.
Although it is coded for H on the total pH scale, for the pH values occuring in
seawater (pH > 6) it will be equally valid on any pH scale (H terms negligible) as
long as the K Constants are on that scale.
Based on the CalculatepHfromTA* functions, version 04.01, Oct 96, by Ernie Lewis.
"""
# First guess inspired by M13/OE15, added v1.3.0:
pH = initialfunc(TA, VX, totals["TB"], k_constants["K1"],
k_constants["K2"], k_constants["KB"])
deltapH = 1.0 + pHTol
while np.any(np.abs(deltapH) >= pHTol):
pHdone = np.abs(
deltapH) < pHTol # check which rows don't need updating
deltapH = deltafunc(pH, TA, VX, totals, k_constants) # the pH jump
# To keep the jump from being too big:
abs_deltapH = np.abs(deltapH)
np.sign_deltapH = np.sign(deltapH)
# Jump by 1 instead if `deltapH` > 5
deltapH = np.where(abs_deltapH > 5.0, np.sign_deltapH, deltapH)
# Jump by 0.5 instead if 1 < `deltapH` < 5
deltapH = np.where(
(abs_deltapH > 0.5) & (abs_deltapH <= 5.0),
0.5 * np.sign_deltapH,
deltapH,
) # assumes that once we're within 1 of the correct pH, we will converge
pH = np.where(pHdone, pH,
pH + deltapH) # only update rows that need it
return pH
def _update_params(self, x, result):
self.fevals = self.fevals + 1
# Autograd ArrayBox behaves differently from numpy, that fixes it.
result_copy = remove_arraybox(result)
x_copy = remove_arraybox(x)
assert np.any(np.isnan(result_copy)) == False, "X out of domain"
found_best = np.all(result_copy <= self.best_f)
if self._has_eqc:
if found_best:
self.best_z = x_copy
x_copy = np.squeeze(
self._null_space_feasible_matrix @ np.reshape(x_copy,
(-1, 1)) +
self._feasible_vector)
self.all_evals += [result_copy]
self.all_x += [x_copy]
if found_best:
self._best_x = x_copy
self._best_f = result_copy
self.all_best_x += [self.best_x]
self.all_best_f += [self.best_f]
return result
def ineq_func(x):
result = []
for f in inequality:
u = f(x)
#u = remove_arraybox(u)
size_u = np.size(np.shape(u))
if size_u == 2:
result += [-np.inf] if np.any(
u >= 0) else [np.log(np.linalg.det(-u))]
elif size_u == 1:
result += [-np.inf] if np.any(
u >= 0) else [np.sum(np.log(-u))]
else:
result += [-np.inf] if u >= 0 else [np.log(-u)]
#result += [-np.inf] if np.any(u >= 0) else [np.sum(np.log(-u))]
return result
def surgery(Z):
empties = np.isclose(Z.sum(axis=0), 0)
Q, R = Z.shape
if np.any(empties):
print('!')
while np.any(empties):
for r, empty in enumerate(empties):
if empty:
# select a nonempty cluster and split it
c = np.random.choice(np.where(np.logical_not(empties))[0])
for q in range(Q):
if np.random.binomial(1, 0.5):
Z[q, r] = Z[q, c]
Z[q, c] = 0
empties = np.isclose(Z.sum(axis=0), 0)
return Z
def expand(U, wires, num_wires):
r"""Expand a multi-qubit operator into a full system operator.
Args:
U (array): :math:`2^n \times 2^n` matrix where n = len(wires).
wires (Sequence[int]): Target subsystems (order matters! the
left-most Hilbert space is at index 0).
Returns:
array: :math:`2^N\times 2^N` matrix. The full system operator.
"""
if num_wires == 1:
# total number of wires is 1, simply return the matrix
return U
N = num_wires
wires = np.asarray(wires)
if np.any(wires < 0) or np.any(
wires >= N) or len(set(wires)) != len(wires):
raise ValueError(
"Invalid target subsystems provided in 'wires' argument.")
if U.shape != (2**len(wires), 2**len(wires)):
raise ValueError(
"Matrix parameter must be of size (2**len(wires), 2**len(wires))")
# generate N qubit basis states via the cartesian product
tuples = np.array(list(itertools.product([0, 1], repeat=N)))
# wires not acted on by the operator
inactive_wires = list(set(range(N)) - set(wires))
# expand U to act on the entire system
U = np.kron(U, np.identity(2**len(inactive_wires)))
# move active wires to beginning of the list of wires
rearranged_wires = np.array(list(wires) + inactive_wires)
# convert to computational basis
# i.e., converting the list of basis state bit strings into
# a list of decimal numbers that correspond to the computational
# basis state. For example, [0, 1, 0, 1, 1] = 2^3+2^1+2^0 = 11.
perm = np.ravel_multi_index(tuples[:, rearranged_wires].T, [2] * N)
# permute U to take into account rearranged wires
return U[:, perm][perm]
def __init__(self, frame, sky_coord, observations):
"""Source intialized with a single pixel
Parameters
----------
frame: `~scarlet.Frame`
The frame of the model
sky_coord: tuple
Center of the source
observations: instance or list of `~scarlet.Observation`
Observation(s) to initialize this source
"""
C, Ny, Nx = frame.shape
self.center = np.array(frame.get_pixel(sky_coord), dtype="float")
# initialize SED from sky_coord
try:
iter(observations)
except TypeError:
observations = [observations]
# determine initial SED from peak position
# SED in the frame for source detection
seds = []
for obs in observations:
_sed = get_psf_sed(sky_coord, obs, frame)
seds.append(_sed)
sed = np.concatenate(seds).reshape(-1)
if np.any(sed <= 0):
# If the flux in all channels is <=0,
# the new sed will be filled with NaN values,
# which will cause the code to crash later
msg = "Zero or negative SED {} at y={}, x={}".format(
sed, *sky_coord)
if np.all(sed <= 0):
logger.warning(msg)
else:
logger.info(msg)
# set up parameters
sed = Parameter(
sed,
name="sed",
step=partial(relative_step, factor=1e-2),
constraint=PositivityConstraint(),
)
center = Parameter(self.center, name="center", step=1e-1)
# define bbox
pixel_center = tuple(np.round(center).astype("int"))
front, back = 0, C
bottom = pixel_center[0] - frame.psf.shape[1] // 2
top = pixel_center[0] + frame.psf.shape[1] // 2
left = pixel_center[1] - frame.psf.shape[2] // 2
right = pixel_center[1] + frame.psf.shape[2] // 2
bbox = Box.from_bounds((front, back), (bottom, top), (left, right))
super().__init__(frame, sed, center, self._psf_wrapper, bbox=bbox)
def standardToNat( cls, pi ):
if( np.any( np.isclose( pi, 0.0 ) ) ):
n = np.empty_like( pi )
n[ ~np.isclose( pi, 0.0 ) ] = np.log( pi[ ~np.isclose( pi, 0.0 ) ] )
n[ np.isclose( pi, 0.0 ) ] = np.NINF
else:
n = np.log( pi )
return ( n, )
def load_stamps_and_samps(gstamps):
# gather all stamp files!
print "loading available stamps"
gstamps.sort()
stamp_ids = extract_stamp_ids(gstamps)
stamps = stamps2array(gstamps)
# gather all samps!
print "loading MCMC sample files"
gal_chain_template = 'samp_cache/run5/gal_samps_stamp_%s_chain_0.bin'
gal_chain_files = [gal_chain_template%sid for sid in stamp_ids]
chain_mask = np.zeros(len(stamp_ids), dtype=np.bool) # keep track of the ones that actually have samples
Nselect = 500
Nskip = 5
samps = []
for i,chain in enumerate(gal_chain_files):
print "Galaxy", os.path.basename(chain)
## 0. load four chains from disk
src_samp_chains, ll_samp_chains, eps_samp_chains = \
io.load_mcmc_chains(chain, num_chains=4)
if len(src_samp_chains) > 0:
th = rec2matrix( np.concatenate(src_samp_chains))
# make sure there are no infinite samples
if np.any(np.isinf(th)) or np.any(np.isnan(th)):
continue
chain_mask[i] = True
samps.append(th[-Nselect*Nskip:-1:Nskip, :])
print "There are %d chains with either missing, zeros, or otherwise unsuitable samples"%((~chain_mask).sum())
# samps and stamps now aligned
stamps = stamps[chain_mask, :, :, :]
samps = np.array(samps)
return stamps, samps
#####################################################################
# fit model to galaxy shape parameters
#
# re - [0, infty], transformation log
# ab - [0, 1], transformation log (ab / (1 - ab))
# phi - [0, 180], transformation log (phi / (180 - phi))
#
######################################################################
print "fitting galaxy shape"
shape_df = np.row_stack([ coadd_df[['expRad_r', 'expAB_r', 'expPhi_r']].values,
coadd_df[['deVRad_r', 'deVAB_r', 'deVPhi_r']].values ])[::3,:]
shape_df[:,0] = np.log(shape_df[:,0])
shape_df[:,1] = np.log(shape_df[:,1]) - np.log(1.-shape_df[:,1])
shape_df[:,2] = shape_df[:,2] * (np.pi / 180.)
bad_idx = np.any(np.isinf(shape_df), axis=1)
shape_df = shape_df[~bad_idx,:]
gal_re_mog = fit_mog(shape_df[:,0], mog_class = GalRadiusMoG, max_comps=50)
gal_ab_mog = fit_mog(shape_df[:,1], mog_class = GalAbMoG, max_comps=50)
with open('gal_re_mog.pkl', 'wb') as f:
pickle.dump(gal_re_mog, f)
with open('gal_ab_mog.pkl', 'wb') as f:
pickle.dump(gal_ab_mog, f)
#####################################################################
# fit star => galaxy proposal distributions
#
# re - [0, infty], transformation log
def to_log_nanomaggies(mags):
fluxes = np.log(mags2nanomaggies(mags))
bad_idx = np.any(np.isinf(fluxes), axis=1)
return fluxes[~bad_idx,:]
def polyinterp(points, doPlot=None, xminBound=None, xmaxBound=None):
""" polynomial interpolation
Parameters
----------
points: shape(pointNum, 3), three columns represents x, f, g
doPolot: set to 1 to plot, default 0
xmin: min value that brackets minimum (default: min of points)
xmax: max value that brackets maximum (default: max of points)
set f or g to sqrt(-1)=1j if they are not known
the order of the polynomial is the number of known f and g values minus 1
Returns
-------
minPos:
fmin:
"""
if doPlot == None:
doPlot = 0
nPoints = points.shape[0]
order = np.sum(np.imag(points[:, 1:3]) == 0) -1
# code for most common case: cubic interpolation of 2 points
if nPoints == 2 and order == 3 and doPlot == 0:
[minVal, minPos] = [np.min(points[:,0]), np.argmin(points[:,0])]
notMinPos = 1 - minPos
d1 = points[minPos,2] + points[notMinPos,2] - 3*(points[minPos,1]-\
points[notMinPos,1])/(points[minPos,0]-points[notMinPos,0])
t_d2 = d1**2 - points[minPos,2]*points[notMinPos,2]
if t_d2 > 0:
d2 = np.sqrt(t_d2)
else:
d2 = np.sqrt(-t_d2) * np.complex(0,1)
if np.isreal(d2):
t = points[notMinPos,0] - (points[notMinPos,0]-points[minPos,0])*\
((points[notMinPos,2]+d2-d1)/(points[notMinPos,2]-\
points[minPos,2]+2*d2))
minPos = np.min([np.max([t,points[minPos,0]]), points[notMinPos,0]])
else:
minPos = np.mean(points[:,0])
fmin = minVal
return (minPos, fmin)
xmin = np.min(points[:,0])
xmax = np.max(points[:,0])
# compute bounds of interpolation area
if xminBound == None:
xminBound = xmin
if xmaxBound == None:
xmaxBound = xmax
# constraints based on available function values
A = np.zeros((0, order+1))
b = np.zeros((0, 1))
for i in range(nPoints):
if np.imag(points[i,1]) == 0:
constraint = np.zeros(order+1)
for j in np.arange(order,-1,-1):
constraint[order-j] = points[i,0]**j
A = np.vstack((A, constraint))
b = np.append(b, points[i,1])
# constraints based on availabe derivatives
for i in range(nPoints):
if np.isreal(points[i,2]):
constraint = np.zeros(order+1)
for j in range(1,order+1):
constraint[j-1] = (order-j+1)* points[i,0]**(order-j)
A = np.vstack((A, constraint))
b = np.append(b,points[i,2])
# find interpolating polynomial
params = np.linalg.solve(A, b)
# compute critical points
dParams = np.zeros(order)
for i in range(params.size-1):
dParams[i] = params[i] * (order-i)
if np.any(np.isinf(dParams)):
cp = np.concatenate((np.array([xminBound, xmaxBound]), points[:,0]))
else:
cp = np.concatenate((np.array([xminBound, xmaxBound]), points[:,0], \
np.roots(dParams)))
# test critical points
fmin = np.infty;
minPos = (xminBound + xmaxBound)/2.
for xCP in cp:
if np.imag(xCP) == 0 and xCP >= xminBound and xCP <= xmaxBound:
fCP = np.polyval(params, xCP)
if np.imag(fCP) == 0 and fCP < fmin:
minPos = np.double(np.real(xCP))
fmin = np.double(np.real(fCP))
# plot situation (omit this part for now since we are not going to use it
# anyway)
return (minPos, fmin)
def isLegal(v):
return np.sum(np.any(np.imag(v)))==0 and np.sum(np.isnan(v))==0 and \
np.sum(np.isinf(v))==0