def linfieldlocal(white, config, name='linfield'):
'''generate a linear field with a given linear power spectrum'''
bs, nc = config['boxsize'], config['nc']
whitec = tfpf.r2c3d(white, norm=nc**3)
lineark = tf.multiply(whitec, (pkmesh / bs**3)**0.5)
linear = tfpf.c2r3d(lineark, norm=nc**3, name=name)
return linear
def reconmodel(config,
data,
sigma=0.01**0.5,
maxiter=100,
gtol=1e-5,
anneal=True):
bs, nc = config['boxsize'], config['nc']
kmesh = sum(kk**2 for kk in config['kvec'])**0.5
priorwt = config['ipklin'](kmesh) * bs**-3
g = tf.Graph()
with g.as_default():
module = hub.Module(modpath)
initlin = tf.placeholder(tf.float32, (nc, nc, nc), name='initlin')
linear = tf.get_variable('linmesh',
shape=(nc, nc, nc),
initializer=tf.random_normal_initializer(
mean=1.0, stddev=0.5),
trainable=True)
initlin_op = linear.assign(initlin, name='initlin_op')
#PM
icstate = tfpm.lptinit(linear, config, name='icstate')
fnstate = tfpm.nbody(icstate, config, verbose=False, name='fnstate')
final = tf.zeros_like(linear)
final = tfpf.cic_paint(final, fnstate[0], boxsize=bs, name='final')
#
#xx = tf.reshape(final, shape=[-1, cube_sizeft, cube_sizeft, cube_sizeft, nchannels], name='input')
xx = tf.concat((final[-pad:, :, :], final, final[:pad, :, :]), axis=0)
xx = tf.concat((xx[:, -pad:, :], xx, xx[:, :pad, :]), axis=1)
xx = tf.concat((xx[:, :, -pad:], xx, xx[:, :, :pad]), axis=2)
xx = tf.expand_dims(tf.expand_dims(xx, 0), -1)
#Halos
#yy = tf.reshape(data, shape=[-1, cube_size, cube_size, cube_size, 1], name='labels')
yy = tf.expand_dims(data, 0)
print('xx, yy shape :', xx.shape, yy.shape)
likelihood = module(dict(features=tf.cast(xx, tf.float32),
labels=tf.cast(yy, tf.float32)),
as_dict=True)['loglikelihood']
print(likelihood.shape)
##Anneal
Rsm = tf.placeholder(tf.float32, name='smoothing')
if anneal:
Rsm = tf.multiply(Rsm, bs / nc)
Rsmsq = tf.multiply(Rsm, Rsm)
smwts = tf.exp(tf.multiply(-kmesh**2, Rsmsq))
likelihood = tf.squeeze(likelihood)
print(likelihood.shape)
likelihoodk = tfpf.r2c3d(likelihood, norm=nc**3)
likelihoodk = tf.multiply(likelihoodk,
tf.cast(smwts, tf.complex64))
likelihood = tfpf.c2r3d(likelihoodk, norm=nc**3)
residual = -tf.reduce_sum(likelihood)
#Prior
lineark = tfpf.r2c3d(linear, norm=nc**3)
priormesh = tf.square(tf.cast(tf.abs(lineark), tf.float32))
prior = tf.reduce_sum(tf.multiply(priormesh, 1 / priorwt))
prior = tf.multiply(prior, 1 / nc**3, name='prior')
chisq = tf.multiply(residual, 1 / nc**0, name='chisq')
loss = tf.add(chisq, prior, name='loss')
optimizer = ScipyOptimizerInterface(loss,
var_list=[linear],
method='L-BFGS-B',
options={
'maxiter': maxiter,
'gtol': gtol
})
tf.add_to_collection('inits', [initlin_op, initlin])
tf.add_to_collection('opt', optimizer)
tf.add_to_collection('diagnostics', [prior, chisq, loss])
tf.add_to_collection('reconpm', [linear, final, fnstate])
tf.add_to_collection('data', data)
return g
## gradandvars_prior = optimizer.compute_gradients(prior, linmesh)
## opt_op = optimizer.apply_gradients(grads_and_vars1, name='apply_grad')
##
gradandvars_new = []
for i in range(len(gradandvars_chisq)):
g1, v = gradandvars_chisq[i]
g2, _ = gradandvars_prior[i]
if len(R0s) > 1:
gk = tfpf.r2c3d(g1, norm=nc**3)
smwts = tf.exp(
tf.multiply(-0.5 * kmesh**2,
tf.multiply(Rsm * bs / nc, Rsm * bs / nc)))
gk = tf.multiply(gk, tf.cast(smwts, tf.complex64))
g1 = tfpf.c2r3d(gk, norm=nc**3)
gradandvars_new.append((g1 + g2, v))
applygrads = optimizer.apply_gradients(gradandvars_new)
if datainit:
initval = np.exp(session.run(samples, {Rsm: 0}))
if initval is not None:
print('Do init')
initlinop = g.get_operation_by_name('initlin_op')
initlin = g.get_tensor_by_name('initlin:0')
session.run(initlinop, {initlin: initval})
def checkiter(mode, optfolder, R0=0):
linear = tfpf.c2r3d(lineark, norm=nc**3, name=name)
return linear
#
config = Config(bs=100, nc=32, seed=200, pkfile=pkfile)
bs, nc = config['boxsize'], config['nc']
kmesh = sum(kk**2 for kk in config['kvec'])**0.5
pkmesh = config['ipklin'](kmesh)
print(bs, nc)
xx = tf.placeholder(tf.float32, (nc, nc, nc), name='white')
whitec = tfpf.r2c3d(xx, norm=nc**3)
lineark = tf.multiply(whitec, (pkmesh / bs**3)**0.5)
linear = tfpf.c2r3d(lineark, norm=nc**3, name='linear')
icstate = tfpm.lptinit(linear, config, name='icstate')
fnstate = tfpm.nbody(icstate, config, verbose=False, name='fnstate')
final = tf.zeros_like(linear)
final = tfpf.cic_paint(final,
fnstate[0],
boxsize=config['boxsize'],
name='final')
def relu(x):
mask = x < 0
y = x.copy()
y[mask] *= 0
return y