def read_data(is_in_data_file):
# READ DATE IF IS AVAILABLE
if (is_in_data_file):
with open('data/data', 'rb') as f:
data = pickle.load(f)
return data
power_data = sp.delete(sp.genfromtxt("data/Power_history.csv", delimiter=","), 0, 1).flatten()
weather_data = sp.stack([x.flatten() for x in sp.delete([sp.genfromtxt("data/" + filename, delimiter=",") for filename in filenames], [0, 1], 2)])
weather_data = sp.delete(weather_data, sp.s_[:18], 1)
# PREPROCESSING
# REDUCE BROKEN DATA
weather_data = sp.stack(x[~sp.isnan(x)] for x in weather_data)
weather_data = sp.stack(x[~sp.isnan(power_data)] for x in weather_data)
power_data = power_data[~sp.isnan(power_data)]
data = sp.vstack([weather_data, power_data])
data = data.transpose()
# SELECT FILES TO BE INCLUDED IN COMPUTATION, POWER DATA ARE ALWAYS AT DATA[-1] !!!
data = preproces(data, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
# WRITING OUTPUT DATA TO FILE 'DATA'
with open('data/data', 'wb') as f:
pickle.dump(data, f)
return data
def get_HRRR_data(filename):
grbs = pygrib.open(filename)
msgs = [str(grb) for grb in grbs]
string = 'Geopotential Height:gpm'
temp = [
msg for msg in msgs
if msg.find(string) > -1 and msg.find('isobaricInhPa') > -1
]
pressure_levels_Pa = s.array([int(s.split(' ')[3]) for s in temp])
geo_pot_height_grbs = grbs.select(name = 'Geopotential Height', \
typeOfLevel='isobaricInhPa', level=lambda l: l > 0)
temperature_grbs = grbs.select(name = 'Temperature', \
typeOfLevel='isobaricInhPa', level=lambda l: l > 0)
rh_grbs = grbs.select(name = 'Relative humidity', \
typeOfLevel='isobaricInhPa', level=lambda l: l > 0)
lat, lon = geo_pot_height_grbs[0].latlons()
geo_pot_height = s.stack([grb.values for grb in geo_pot_height_grbs])
temperature = s.stack([grb.values for grb in temperature_grbs])
rh = s.stack([grb.values for grb in rh_grbs])
return lat, lon, geo_pot_height, temperature, rh, pressure_levels_Pa
def unpack_segment(Seg, num_lags=200, intercept=True):
""" """
lags = sp.arange(-num_lags / 2, num_lags / 2, 1, dtype='int32')
Y = sp.stack([asig.magnitude.flatten() for asig in Seg.analogsignals],
axis=1)
t_start = Seg.analogsignals[0].t_start.rescale('ms')
t_stop = Seg.analogsignals[0].t_stop.rescale('ms')
dt = Seg.analogsignals[0].sampling_period.rescale('ms')
X = []
for event in Seg.events:
st = neo.core.SpikeTrain(event.times, t_stop=t_stop)
bst = ele.conversion.BinnedSpikeTrain(st,
binsize=dt,
t_start=t_start,
t_stop=t_stop)
reg = bst.to_array().flatten()
for lag in lags:
X.append(sp.roll(reg, lag))
X = sp.stack(X, axis=1)
if intercept:
X = sp.concatenate([sp.ones((X.shape[0], 1)), X], 1)
t_lags = lags * dt.magnitude
return Y, X, t_lags
def gen_sample(f, vnoise, xnoise):
true_vx = f(t)
true_x = cumtrapz(true_vx, t)
true_x = sp.hstack([[0], true_x])
noisy_vx = f(t + sp.random.randn(*t.shape) *
xnoise) + sp.random.randn(*t.shape) * vnoise
noisy_x = true_x + sp.random.randn(*t.shape) * xnoise
noisy_x = noisy_x
return sp.stack([true_x, true_vx]).T, sp.stack([noisy_x, noisy_vx]).T
def gen_sample(v, vnoise_sigma, xnoise_mu1,xnoise_mu2, xnoise_sigma1,xnoise_sigma2):
true_vx = v*sp.ones_like(t) #Velocity is taken as constant
#Trapezoidal rule integration of velocity into position
true_x = cumtrapz(true_vx,t,initial=0)
#Velocity only has Gaussian noise (this might have to be changed)
noisy_vx = true_vx+sp.random.randn(*t.shape)*vnoise_sigma
#Position has bimodal noise
noise_dist = bimodal_gaussian(xnoise_mu1,xnoise_mu2,xnoise_sigma1,xnoise_sigma2,-10,10,150)
noisy_x = true_x+noise_dist.sample(*t.shape)
return sp.stack([true_x,true_vx]).T, sp.stack([noisy_x,noisy_vx]).T
def feros_velocity_correction(spec, create_fits=False, rv=False, out=''):
"""Radial velocity correction for a FEROS spectrum.
Parameters
----------
spec : file
Fits file with FEROS spectra reduced with CERES.
create_fits : bool, optional
True to save a fits file with the result.
Returns
-------
wavelength : array_like
An array with the rest frame wavelengths.
flux : array_like
An array with the corresponding fluxes.
"""
# Read fits file
hdul = fits.open(spec)
# Extract RV
if not rv:
rv = hdul[0].header['RV'] * u.km / u.s
rv = rv.to(u.m / u.s)
# Create gamma
beta = rv / const.c
gamma = 1 + beta.value
# Extract wavelength per order
wave = hdul[0].data[0, :, :]
# Extract flux per order
flux = hdul[0].data[9, :, :]
orders = wave.shape[0]
wave_rest = copy.deepcopy(wave)
# Move spectra to rest frame
for o in range(orders):
wave_rest[o, :] /= gamma
if create_fits:
# Create new fits file
if not out:
out = spec.split('.fits')[0]
else:
date = hdul[0].header['HIERARCH SHUTTER START DATE'].split('-')
ut = hdul[0].header['HIERARCH SHUTTER START UT'].split(':')
out += hdul[0].header['HIERARCH TARGET NAME'] + '_'
for d in date:
out += d
out += '_UT'
for u in ut:
out += u
out += '_rest_frame.fits'
hdu = fits.PrimaryHDU(sp.stack((wave_rest, flux)))
try:
hdu.writeto(out)
except OSError:
os.remove(out)
hdu.writeto(out)
hdul.close()
return wave_rest, flux
def events2span(Data, entry_event, exit_event):
entry_event = "TRIAL_ENTRY_EVENT"
exit_event = "ITI_STATE"
data_entry = Data.groupby("name").get_group(entry_event)
data_exit = Data.groupby("name").get_group(exit_event)
if data_entry.shape[0] == data_exit.shape[0]:
# easy peasy
Span = pd.DataFrame(sp.stack([data_entry['t'].values,data_exit['t'].values],axis=1),columns=['t_on','t_off'])
Span['dt'] = Span['t_off'] - Span['t_on']
return Span
if data_entry.shape[0] != data_exit.shape[0]:
print("problems occur: unequal number of entry and exits")
ts = []
for tup in data_entry.itertuples():
t_on = tup.t
t_max = data_exit.iloc[-1]['t']
try:
t_off = bhv.time_slice(data_exit, t_on, t_max, 't').iloc[0]['t']
ts.append((t_on,t_off))
except IndexError:
# thrown when last is on
pass
Span = pd.DataFrame(ts,columns=['t_on','t_off'])
Span['dt'] = Span['t_off'] - Span['t_on']
return Span
def exportCV(x, y):
global ncv
curr = dataCube[y, x, :]
cv = sp.stack((E, curr), axis=-1)
path = filePath + '_' + str(ncv) + '_x' + str(x) + '_y' + str(y) + '.txt'
sp.savetxt(path, cv, delimiter='\t')
ncv += 1
def get_prf_data(pixel_values,
pixel_stddev,
pixel_offsets,
error_threshold=0.1):
"""
Return the PRF measurements for (a subset of) the image.
Args:
pixel_values(2-D float array): The calibrated pixel responses from
the image to include in the plot.
pixel_stddev(2-D float array): The estimated standard deviation of
`pixel_values`.
pixel_offsets: The slice of the return value of find_pixel_offsets()
corresponding to `pixel_values`.
Returns:
(2-D float array, 2-D float array, 2-D float array, 2-D float array):
* The x-offsets of the points at which PRF measurements are
available.
* The y-offsets of the points at which PRF measurements are
available.
* The measured normalized PRF at the available offsets
* estimated errors of the PRF measurements.
"""
prf_measurements = (
(
pixel_values
-
pixel_offsets['zero_point']
)
/
pixel_offsets['norm']
)
prf_errors = (
pixel_stddev
/
pixel_offsets['norm']
)
#False positive
#pylint: disable=assignment-from-no-return
include = scipy.logical_and(scipy.isfinite(prf_measurements),
scipy.isfinite(prf_errors))
include = scipy.logical_and(include, prf_errors < error_threshold)
#pylint: enable=assignment-from-no-return
return scipy.stack((
pixel_offsets['x_off'][include],
pixel_offsets['y_off'][include],
prf_measurements[include],
prf_errors[include]
))
def exportCV(x,y):
global ncv
curr = dataCube[y,x,trim1:Nt-trim2]/Asc - y0
darkCurr = darkCube[y,x,:]
photoCurr = photoCube[y,x,:]
cv = sp.stack((E[trim1:Nt-trim2],curr,darkCurr,photoCurr),axis=-1)
path = cvsPath + baseName + '_' + str(ncv) + '_x' + str(x) + '_y' + str(y) + '.txt'
sp.savetxt(path,cv,delimiter='\t')
ncv += 1
def full_image(i=None):
global _full
if _full is None:
path = Path('cache/full.npy')
if not path.exists():
ims = [_full_image(i) for i in range(1, COUNTS['full'] + 1)]
sp.save(path, sp.stack(ims))
_full = sp.load(path)
ims = _full[i - 1] if i is not None else _full
return ims
def generate_index_map(nonzero_locs, shape):
r"""
Determines the i,j,k indicies of the flattened array
"""
#
logger.info('creating index map of non-zero values...')
x_c = sp.unravel_index(nonzero_locs, shape)[0].astype(sp.int16)
y_c = sp.unravel_index(nonzero_locs, shape)[1].astype(sp.int16)
z_c = sp.unravel_index(nonzero_locs, shape)[2].astype(sp.int16)
index_map = sp.stack((x_c, y_c, z_c), axis=1)
#
return index_map
def generate_index_map(nonzero_locs, shape):
r"""
Determines the i,j,k indicies of the flattened array
"""
#
logger.info('creating index map of non-zero values...')
x_c = sp.unravel_index(nonzero_locs, shape)[0].astype(sp.int16)
y_c = sp.unravel_index(nonzero_locs, shape)[1].astype(sp.int16)
z_c = sp.unravel_index(nonzero_locs, shape)[2].astype(sp.int16)
index_map = sp.stack((x_c, y_c, z_c), axis=1)
#
return index_map
def quadrant_image(i=None):
global _quadrant
if _quadrant is None:
path = Path('cache/quadrant.npy')
if not path.exists():
ims = [
_quadrant_image(i) for i in range(1, COUNTS['quadrant'] + 1)
]
sp.save(path, sp.stack(ims))
_quadrant = sp.load(path)
ims = _quadrant[i - 1] if i is not None else _quadrant
return ims
def bumpmaps(category, number=None):
"""Uses a NN to generate a perfect image, and caches the result so it'll be fast to load next time"""
if number is None:
return sp.stack([
bumpmaps(category, n)
for n in tqdm(range(1, tools.COUNTS[category] + 1))
])
path = Path(f'cache/nn/output/{category}/{number}.npy')
if not path.exists():
path.parent.mkdir(exist_ok=True, parents=True)
losses, model = load(*MODEL)
bumps = evaluate(category, number, model)[1]
sp.save(path, bumps)
return sp.load(path)
def test_simple_mv(self):
'''
Test a simple multivariate example (to the best of our abilities given we don't have a ground truth for this
example).
:return:
'''
# load the second OX reference data set.
with open(os.path.join(self.datapath, "2/params.json")) as f:
params = json.loads(f.read())
yy = sp.array(parse_ox_csv(
os.path.join(self.datapath, "2/raw_data.csv")),
dtype=np.float64).transpose()
y = sp.reshape(yy, (101, 25, 1))[1:]
# now we'll make a few copies of the reference data and stack them along the third axis.
y = sp.squeeze(sp.stack((y, y, y, y, y), axis=2))
rows = []
for i, group in enumerate(y):
for entry in group:
rows.append([i, "A"] + entry.tolist())
panel_series = PanelSeries.from_list(rows)
# run the filtering
Z = sp.matrix(params["translation_matrix"])
F = sp.matrix(params["transition_matrix"])
a0 = sp.matrix(params["a0"]).reshape(-1, 1)
Q0 = sp.matrix(params["Q0"])
Q = sp.matrix(params["Q"])
sigma = sp.eye(5)
F = block_diag(F, F, F, F, F)
Z = block_diag(Z, Z, Z, Z, Z)
a0 = sp.vstack((a0, a0, a0, a0, a0))
Q0 = block_diag(Q0, Q0, Q0, Q0, Q0)
Q = block_diag(Q, Q, Q, Q, Q)
rsk_filter = RSK(F, Z)
fitted_means = rsk_filter.fit(panel_series, a0, Q0, Q, sigma=sigma)
# check that all means are equal
for row in fitted_means:
assert np.allclose(row[0:2],
row[2:4]), "Measurements differ unexpectedly."
def test_compare_ox_multi(self):
'''
Compare against multivariate ox reference implementation
:return:
'''
with open(os.path.join(self.datapath, "3/params.json")) as f:
params = json.loads(f.read())
yy = sp.array(parse_ox_csv(
os.path.join(self.datapath, "3/raw_data.csv")),
dtype=np.float64)
# unstack yy
subarrays = [yy[i * 15:i * 15 + 15, ] for i in range(10)]
y = sp.stack(tuple(subarrays), axis=0)
rows = []
for i, group in enumerate(y):
for entry in group:
rows.append([i, "A"] + entry.tolist())
panel_series = PanelSeries.from_list(rows)
alpha = sp.matrix(parse_ox_csv(
os.path.join(self.datapath, "3/alpha.csv")),
dtype=np.float64)[:, 1:]
ox_means = sp.array(parse_ox_csv(
os.path.join(self.datapath, "3/means.csv")),
dtype=np.float64).transpose()[1:]
py_means, py_cov = panel_series.means(), panel_series.cov()
# check means
assert sp.allclose(
ox_means,
sp.vstack(py_means)), "Python means do not match OX means"
# check alphas
rsk_filter = RSK(sp.matrix(params["transition_matrix"]),
sp.matrix(params["translation_matrix"]))
rsk_alpha, alpha_filter, alpha_smooth, V, V_filter, V_smooth, _ = rsk_filter._fit(
panel_series,
sp.matrix(params["a0"]),
sp.matrix(params["Q0"]),
sp.matrix(params["Q"]),
sigma=sp.matrix(params["sigma"]))
a1 = alpha.transpose()
a2 = np.squeeze(rsk_alpha)[1:]
assert sp.allclose(a1, a2), "Alpha does not match OX alpha"
def median_combine(spec_list, nord, targ_name, ra, dec, plx):
"""Median combine rest frame spectra.
Parameters
----------
spec_list : array_like
Array with spectra files.
nord : int
Number of echelle orders.
targ_name : str
Target's name.
ra : float
Target's right ascension in degrees.
dec : float
Target's declination in degrees.
plx : float
Target's parallax.
"""
wavelengths = []
fluxes = []
for o in tqdm(range(nord), desc='Order'):
combiner = []
for spec in spec_list:
hdul = fits.open(spec)
flux = hdul[0].data[1, o, :]
wave = hdul[0].data[0, o, :]
combiner.append(flux)
hdul.close()
combiner = sp.array(combiner)
combined = sp.median(combiner, axis=0)
fluxes.append(combined)
wavelengths.append(wave)
final_waves = sp.vstack(wavelengths)
final_fluxes = sp.vstack(fluxes)
final_out = sp.stack([final_waves, final_fluxes])
out = targ_name + '_stacked.fits'
hdr = fits.Header()
hdr['NAME'] = targ_name
hdr['PLX'] = plx
hdr['RA (deg)'] = ra
hdr['DEC (deg)'] = dec
hdu = fits.PrimaryHDU(final_out, header=hdr)
hdu.writeto(out)
pass
def onclick(event):
global X, Y, w1
def xx():
x = sp.sort(X)
for i, s in enumerate(list(sp.asarray(X).argsort())):
if x[i] == x[i - 1]:
return X.remove(X[s]), Y.remove(Y[s]), xx()
if event.button == 1 and event.inaxes:
X.append(event.xdata)
Y.append(event.ydata)
w1.set_data(X, Y)
fig.canvas.draw()
plt.show()
else:
plt.disconnect(cid)
xx()
nx = len(X)
x = sp.poly1d([1, 0])
L = 0
for i in sp.arange(nx):
pom = 1
for j in sp.hstack((sp.arange(i), sp.arange(i + 1, nx))):
pom *= (x - X[j]) / (X[i] - X[j])
L += pom * Y[i]
print(
"\nWielomian lagrange interpolujacy {} punkt ma postac:\n\tx\ty\n {}\n nL:\n {} "
.format(nx, sp.stack((X, Y), axis=1), L))
xw = sp.linspace(min(X), max(X), 1000)
yw = L(xw)
w2.set_data(xw, yw)
ax.set_title("lagrange interpolacja {} pktow".format(nx))
ax.set_xlabel('x')
ax.set_ylabel('y')
ax.axis('equal')
ax.legend()
fig.canvas.draw()
def sample(self, *shape):
bimodal_partial_cdf = cumtrapz(self.bimodal_pdf, initial=0, axis=0)
#First sample in the x coordinate
samplesx = self.ppfx(sp.random.rand(*shape))
#Next sample in the ybin
bin_index = self.ppfix(samplesx)
#compute samples inside the ybin
def compute_sample(ysample, xsample, binindex):
upper_index = sp.int32(sp.ceil(binindex))
lower_index = sp.int32(sp.floor(binindex))
ppy_upper = interpolate.interp1d(
bimodal_partial_cdf[:, upper_index], self.y_eval_space)
ppy_lower = interpolate.interp1d(
bimodal_partial_cdf[:, lower_index], self.y_eval_space)
a = bimodal_partial_cdf[:, upper_index]
b = bimodal_partial_cdf[:, lower_index]
samples_upper = ppy_upper(ysample * (max(a) - min(a)) * 0.9999 +
min(a) * 1.001)
samples_lower = ppy_lower(ysample * (max(b) - min(b)) * 0.9999 +
min(b) * 1.001)
#Lerp over the lower and upper
a = self.x_eval_space[upper_index]
b = self.x_eval_space[lower_index]
return samples_lower + (samples_upper -
samples_lower) / (a - b) * (xsample - b)
#Vectorize and sample in ybin
samplesy = sp.random.rand(*shape)
compute_samples = sp.vectorize(compute_sample)
samplesy = compute_samples(samplesy, samplesx, bin_index)
#Stack the values
samples = sp.stack([samplesx, samplesy])
return samples.T
def load_image_data(image_file, invert):
r"""
Loads an image from a *.tiff stack and creates an array from it. The
fracture is assumed to be black and the solid is white.
"""
logger.info('loading image...')
img_data = Image.open(image_file)
#
# creating full image array
logger.info('creating image array...')
data_array = []
for frame in range(img_data.n_frames):
img_data.seek(frame)
frame = sp.array(img_data, dtype=bool).transpose()
if invert:
frame = ~frame # beacuse fracture is black, solid is white
data_array.append(frame)
#
data_array = sp.stack(data_array, axis=2)
logger.debug(' image dimensions: {} {} {}'.format(*data_array.shape))
#
return data_array
def __new__(cls, image, dtype=bool, *args, **kwargs):
r""" Reads image data, fracture pixels are assumed to be truthy
(i.e. > 0) and rock pixels false (i.e. == 0)
"""
#
# either reads the image data from a file or image is a scipy array
try:
image = Image.open(image)
logger.debug('loaded image from file or file like object')
image_data = []
for frame in range(image.n_frames):
image.seek(frame)
frame = sp.array(image, dtype=dtype).transpose()
image_data.append(frame)
#
# stacking frames into a single 3 dimensional array
image_data = sp.stack(image_data, axis=2)
except AttributeError:
logger.debug('initialized image from data array')
image_data = sp.array(image, ndmin=3, dtype=dtype)
#
# returning a conversion of regular ndarray into my sybclass
return sp.asarray(image_data).view(cls)
vnoise_mu = (VNOISE_MU[1]-VNOISE_MU[0])*sp.random.rand(N_SAMPLES) + VNOISE_MU[0]
vnoise_sigma = (VNOISE_SCALE[1]-VNOISE_SCALE[0])*sp.random.rand(N_SAMPLES)+VNOISE_SCALE[0]
xnoise_mu1 = (XNOISE_MU1[1]-XNOISE_MU1[0])*sp.random.rand(N_SAMPLES) + XNOISE_MU1[0]
left_right = 2*((sp.random.rand(N_SAMPLES)>0.5)-0.5)
left_right[-1] = 1
left_right[-2] = -1
left_right[-3] = 1
left_right[-4] = -1
xnoise_mu2 = left_right*((XNOISE_MU2[1]-XNOISE_MU2[0])*sp.random.rand(N_SAMPLES) + XNOISE_MU2[0])
xnoise_scale1 = (XNOISE_SCALE1[1]-XNOISE_SCALE1[0])*sp.random.rand(N_SAMPLES) + XNOISE_SCALE1[0]
xnoise_scale2 = (XNOISE_SCALE2[1]-XNOISE_SCALE2[0])*sp.random.rand(N_SAMPLES) + XNOISE_SCALE2[0]
batch_generation_inputs = zip(vnoise_mu,vnoise_sigma,xnoise_mu1,xnoise_mu2,xnoise_scale1,xnoise_scale2)
y_batch, x_batch = list(zip(*[gen_sample(*generator) for generator in batch_generation_inputs]))
batch_y= sp.stack(y_batch)
batch_x= sp.stack(x_batch)
print(batch_y.shape,batch_x.shape)
if False:
plt.figure(figsize=(14,16))
for batch_idx in range(N_PLOTS):
noisy_x = batch_x[batch_idx,:,0]
noisy_vx = batch_x[batch_idx,:,1]
true_x = batch_y[batch_idx,:,0]
true_vx = batch_y[batch_idx,:,1]
plt.subplot(20+(N_PLOTS)*100 + batch_idx*2+1)
if batch_idx == 0: plt.title('Location x')
plt.plot(t,true_x,lw=2,label='true')
plt.plot(t,noisy_x,lw=1,label=r'measured ($\mu =$ [%3.2f, %3.2f], $\sigma =$ [%3.2f, %3.2f])'\
def generate_node_connectivity_array(index_map, data_array):
r"""
Generates a node connectivity array based on faces, edges and corner
adjacency
"""
#
logger.info('generating network connections...')
#
# setting up some constants
x_dim, y_dim, z_dim = data_array.shape
conn_map = list(product([0, -1, 1], [0, -1, 1], [0, -1, 1]))
conn_map = sp.array(conn_map, dtype=int)
conn_map = conn_map[1:]
#
# creating slice list to process data chunks
slice_list = [slice(0, 10000)]
for i in range(slice_list[0].stop, index_map.shape[0], slice_list[0].stop):
slice_list.append(slice(i, i+slice_list[0].stop))
slice_list[-1] = slice(slice_list[-1].start, index_map.shape[0])
#
conns = sp.ones((0, 2), dtype=sp.uint32)
logger.debug(' number of slices to process: {}'.format(len(slice_list)))
for sect in slice_list:
# getting coordinates of nodes and their neighbors
nodes = index_map[sect]
inds = sp.repeat(nodes, conn_map.shape[0], axis=0)
inds += sp.tile(conn_map, (nodes.shape[0], 1))
#
# calculating the flattened index of the central nodes and storing
nodes = sp.ravel_multi_index(sp.hsplit(nodes, 3), data_array.shape)
inds = sp.hstack([inds, sp.repeat(nodes, conn_map.shape[0], axis=0)])
#
# removing neigbors with negative indicies
mask = ~inds[:, 0:3] < 0
inds = inds[sp.sum(mask, axis=1) == 3]
# removing neighbors with indicies outside of bounds
mask = (inds[:, 0] < x_dim, inds[:, 1] < y_dim, inds[:, 2] < z_dim)
mask = sp.stack(mask, axis=1)
inds = inds[sp.sum(mask, axis=1) == 3]
# removing indices with zero-weight connection
mask = data_array[inds[:, 0], inds[:, 1], inds[:, 2]]
inds = inds[mask]
if inds.size:
# calculating flattened index of remaining nieghbor nodes
nodes = sp.ravel_multi_index(sp.hsplit(inds[:, 0:3], 3),
data_array.shape)
inds = sp.hstack([sp.reshape(inds[:, -1], (-1, 1)), nodes])
# ensuring conns[0] is always < conns[1] for duplicate removal
mask = inds[:, 0] > inds[:, 1]
inds[mask] = inds[mask][:, ::-1]
# appending section connectivity data to conns array
conns = sp.append(conns, inds.astype(sp.uint32), axis=0)
#
# using scipy magic from stackoverflow to remove dupilcate connections
logger.info('removing duplicate connections...')
dim0 = conns.shape[0]
conns = sp.ascontiguousarray(conns)
dtype = sp.dtype((sp.void, conns.dtype.itemsize*conns.shape[1]))
dim1 = conns.shape[1]
conns = sp.unique(conns.view(dtype)).view(conns.dtype).reshape(-1, dim1)
logger.debug(' removed {} duplicates'.format(dim0 - conns.shape[0]))
#
return conns
def generate_node_connectivity_array(index_map, data_array):
r"""
Generates a node connectivity array based on faces, edges and corner
adjacency
"""
#
logger.info('generating network connections...')
#
# setting up some constants
x_dim, y_dim, z_dim = data_array.shape
conn_map = list(product([0, -1, 1], [0, -1, 1], [0, -1, 1]))
#
conn_map = sp.array(conn_map, dtype=int)
conn_map = conn_map[1:]
#
# creating slice list to process data chunks
slice_list = [slice(0, 10000)]
for i in range(slice_list[0].stop, index_map.shape[0], slice_list[0].stop):
slice_list.append(slice(i, i + slice_list[0].stop))
slice_list[-1] = slice(slice_list[-1].start, index_map.shape[0])
#
conns = sp.ones((0, 2), dtype=data_array.index_int_type)
logger.debug('\tnumber of slices to process: {}'.format(len(slice_list)))
percent = 10
for n, sect in enumerate(slice_list):
# getting coordinates of nodes and their neighbors
nodes = index_map[sect]
inds = sp.repeat(nodes, conn_map.shape[0], axis=0)
inds += sp.tile(conn_map, (nodes.shape[0], 1))
#
# calculating the flattened index of the central nodes and storing
nodes = sp.ravel_multi_index(sp.hsplit(nodes, 3), data_array.shape)
inds = sp.hstack([inds, sp.repeat(nodes, conn_map.shape[0], axis=0)])
#
# removing neigbors with negative indicies
mask = ~inds[:, 0:3] < 0
inds = inds[sp.sum(mask, axis=1) == 3]
# removing neighbors with indicies outside of bounds
mask = (inds[:, 0] < x_dim, inds[:, 1] < y_dim, inds[:, 2] < z_dim)
mask = sp.stack(mask, axis=1)
inds = inds[sp.sum(mask, axis=1) == 3]
# removing indices with zero-weight connection
mask = data_array[inds[:, 0], inds[:, 1], inds[:, 2]]
inds = inds[mask]
if inds.size:
# calculating flattened index of remaining nieghbor nodes
nodes = sp.ravel_multi_index(sp.hsplit(inds[:, 0:3], 3),
data_array.shape)
inds = sp.hstack([sp.reshape(inds[:, -1], (-1, 1)), nodes])
# ensuring conns[0] is always < conns[1] for duplicate removal
mask = inds[:, 0] > inds[:, 1]
inds[mask] = inds[mask][:, ::-1]
# appending section connectivity data to conns array
conns = sp.append(conns, inds.astype(sp.uint32), axis=0)
if int(n / len(slice_list) * 100) == percent:
logger.debug('\tprocessed slice {:5d}, {}% complete'.format(
n, percent))
percent += 10
#
# using scipy magic from stackoverflow to remove dupilcate connections
logger.info('removing duplicate connections...')
dim0 = conns.shape[0]
conns = sp.ascontiguousarray(conns)
dtype = sp.dtype((sp.void, conns.dtype.itemsize * conns.shape[1]))
dim1 = conns.shape[1]
conns = sp.unique(conns.view(dtype)).view(conns.dtype).reshape(-1, dim1)
logger.debug('\tremoved {} duplicates'.format(dim0 - conns.shape[0]))
#
return conns
shapes = [
functools.reduce(lambda x, y: x * y, variable.get_shape())
for variable in tf.trainable_variables()
]
print('Nparams: ', functools.reduce(lambda x, y: x + y, shapes))
#%% TRAINING
data = []
#Add saver
saver = tf.train.Saver()
for i in range(8):
file_name = 'Oval_circ1_N' + str(i + 1) + '.txt'
data.append(read_file(file_name))
file_name = 'Oval_circ2_N' + str(i + 1) + '.txt'
data.append(read_file(file_name))
#data contains [t, t_diff, x,y,z,vx,vy,vz, x_t,y_t,z_t,vx_t,vy_t,vz_t]
all_data = sp.stack(data)
batch_x = all_data[:, :, 2:8]
batch_y = all_data[:, :, 8:]
train_batch_x = batch_x[:BATCH_SIZE, :, :]
train_batch_y = batch_y[:BATCH_SIZE, :, :]
test_batch_x = batch_x[BATCH_SIZE:, :, :]
test_batch_y = batch_y[BATCH_SIZE:, :, :]
#Save losses for plotting of progress
dev_loss_plot = []
tra_loss_plot = []
lr_plot = []
with tf.Session(graph=g1) as sess:
if RESTORE_CHECKPOINT:
saver.restore(sess, SAVE_DIR + "/model.ckpt")
def compute_contacts(dom, people, dmax):
"""
This function uses a KDTree method to find the contacts \
between individuals. Moreover the contacts with the walls \
are also determined from the wall distance (obtained by the \
fast-marching method).
Parameters
----------
dom: Domain
contains everything for managing the domain
people: numpy array
people coordinates and radius : x,y,r
dmax: float
threshold value used to consider a contact as \
active (dij<dmax)
Returns
-------
contacts: numpy array
all the contacts i,j,dij,eij_x,eij_y such that dij<dmax \
and i<j (no duplication)
"""
# lf : the number of points at which the algorithm
# switches over to brute-force. Has to be positive.
lf = 100
if (lf > sys.getrecursionlimit()):
sys.setrecursionlimit(lf)
kd = cKDTree(people[:, :2], leafsize=lf)
## Find all pairs of points whose distance is at most dmax+2*rmax
rmax = people[:, 2].max()
neighbors = kd.query_ball_tree(kd, dmax + 2 * rmax)
## Create the contact array : i,j,dij,eij_x,eij_y
first_elements = sp.arange(people.shape[0]) ## i.e. i
other_elements = list(map(lambda x: x[1:],
neighbors)) ## i.e. all the j values for each i
lengths = list(map(len, other_elements))
tt = sp.stack([first_elements, lengths], axis=1)
I = sp.concatenate(list(map(lambda x: sp.full((x[1], ), x[0]),
tt))).astype(int)
J = sp.concatenate(other_elements).astype(int)
ind = sp.where(I < J)[0]
I = I[ind]
J = J[ind]
DP = people[J, :2] - people[I, :2]
Norm = sp.linalg.norm(DP, axis=1, ord=2)
Dij = Norm - people[I, 2] - people[J, 2]
ind = sp.where(Dij < dmax)[0]
Dij = Dij[ind]
I = I[ind]
J = J[ind]
Norm = Norm[ind]
DP = DP[ind]
contacts = sp.stack([I, J, Dij, DP[:, 0] / Norm, DP[:, 1] / Norm], axis=1)
# Add contacts with the walls
II = sp.floor((people[:, 1] - dom.ymin - 0.5 * dom.pixel_size) /
dom.pixel_size).astype(int)
JJ = sp.floor((people[:, 0] - dom.xmin - 0.5 * dom.pixel_size) /
dom.pixel_size).astype(int)
DD = dom.wall_distance[II, JJ] - people[:, 2]
ind = sp.where(DD < dmax)[0]
wall_contacts = sp.stack([
ind, -1 * sp.ones(ind.shape), DD[ind],
dom.wall_grad_X[II[ind], JJ[ind]], dom.wall_grad_Y[II[ind], JJ[ind]]
],
axis=1)
contacts = sp.vstack([contacts, wall_contacts])
return sp.array(contacts)
def ovf_to_hdf(self,
hdf_name,
ovf_files=[],
delete_ovfs=False,
overwrite=False):
"""Load the data from multiple .ovf files into a chunked .hdf5 file.
This method is useful when the size of the simulation data is too large fit into RAM"""
# check if destination file already exists and whether to overwrite
if (os.path.isfile(hdf_name)) & (overwrite == False):
print(
'file already exists. Set kwarg "overwrite=True" to overwrite existing file. Aborting...'
)
return 0
# calculate the size and shape of the data we are dealing with
meta, header = self.read_ovf(ovf_files[0], target='meta')
header_encoded = [n.encode("ascii", "ignore") for n in header]
data_shape = sp.array([
meta['znodes'], meta['ynodes'], meta['xnodes'], meta['valuedim'],
len(ovf_files)
])
data_size = sp.prod(data_shape * int(meta['Binary']))
time = []
with hd.File(hdf_name, 'w', libver='latest') as f:
dset = f.create_dataset('mag',
data_shape,
dtype=sp.dtype('f' +
str(int(meta['Binary']))),
chunks=True)
# want to add the meta data in but cannot seem to get it to work
# There is a problem with data format supported by hdf5
# go through the ovf files and populate the hdf file with the data
chunk_time_length = dset.chunks[-1]
data_shape = dset.shape
chunk_number = data_shape[-1] / chunk_time_length
chunk_shape = dset.chunks
# Close the hdf5 file at every opportunity
# According to docs: https://support.hdfgroup.org/HDF5/faq/perfissues.html
# a memory leak can occur when writing to the same file many times in a loop
print("creating dataset")
print("shape ", dset.shape)
print("chunks ", dset.chunks)
# prepare an array of all the data in one time chunk
for c in tqdm(range(int(sp.ceil(chunk_number)))):
temp_arr = sp.zeros(
(data_shape[0], data_shape[1], data_shape[2],
data_shape[3], chunk_shape[-1]))
# fill the temp array with data from ovf files
try:
for n in range(chunk_time_length):
temp_arr[:, :, :, :, n], meta, raw = self.read_ovf(
ovf_files[chunk_time_length * c + n])
time.append(meta['time'])
except:
# This catches the unexpected case where the chunk length in time
# does not perfectly divide the length of ovf list
temp = list(
map(self.read_ovf, ovf_files[chunk_time_length * c:]))
temp_arr = sp.stack([a[0] for a in temp], axis=-1)
# open hdf5 file, write the time chunk to disk, close hdf5 file
with hd.File(hdf_name, 'r+', libver="latest") as f:
f['mag'][:, :, :, :, chunk_time_length *
c:chunk_time_length * (c + 1)] = temp_arr
# optionally delete the ovf files as they are written to hdf5
if delete_ovfs == True:
for n in range(chunk_time_length):
os.remove(ovf_files[chunk_time_length * c + n])
# Append to the hdf5 file additional meta data
with hd.File(hdf_name, 'a', libver='latest') as f:
f.create_dataset('time', data=sp.array(time))
f.create_dataset('header', (len(header_encoded), 1), 'S30',
header_encoded)
try:
f.create_dataset('meta', meta.data)
except:
print('failed to save metadata to disk')
# change permissions data.hdf5 file to be read only
os.chmod(hdf_name, 444)
return 0
### COMMON
# the names of the things present in the log
span_names = [name.split('_ON')[0] for name in CodesDf['name'] if name.endswith('_ON')]
event_names = [name.split('_EVENT')[0] for name in CodesDf['name'] if name.endswith('_EVENT')]
Spans = bhv.log2Spans(Data, span_names)
Events = bhv.log2Events(Data, event_names)
### SOME PREPROCESSING
# filter unrealistic licks
bad_licks = sp.logical_or(Spans['LICK']['dt'] < 20,Spans['LICK']['dt'] > 100)
Spans['LICK'] = Spans['LICK'].loc[~bad_licks]
# add lick_event
Lick_Event = pd.DataFrame(sp.stack([['NA']*Spans['LICK'].shape[0],Spans['LICK']['t_on'].values,['LICK_EVENT']*Spans['LICK'].shape[0]]).T,columns=['code','t','name'])
Lick_Event['t'] = Lick_Event['t'].astype('float')
Data = Data.append(Lick_Event)
Data.sort_values('t')
event_names.append("LICK")
Events['LICK'] = bhv.log2Event(Data,'LICK')
Spans.pop("LICK")
span_names.remove("LICK")
colors = sns.color_palette('hls',n_colors=len(event_names)+len(span_names))[::-1]
cdict = dict(zip(event_names+span_names,colors))
"""
def fit(self, steps=200, eps=1e-5, num_restarts=3):
"""Learn the parameters omega, sigma, eta from training data `train` via
EM.
Args:
steps: integer, the maximum number of EM steps to take before
terminating
eps: integer, the tolerance threshold for terminating early from the
optimization routine. Optimization stops when the change in each
parameter is no greater than the value specified here.
num_restarts: integers, the number of restarts to perform
Returns: a pointer to `self`, where the parameter attributes omega,
sigma, and eta have been learned.
"""
train = self.train
N = len(train)
T = self.T
# Allocate "p" matrices
p_aftershock = sp.zeros((N, N))
p_background = sp.zeros((N, N))
# Massage data into proper format and compute reusable values for E-step
# (only needs to be done once)
# Provides iteration over the data (each pair of rows) without using a
# `for` loop
i, j = sp.ogrid[0:N, 0:N]
t_i = train.iloc[i.reshape(N, )]['t'].values.reshape(N, 1)
t_j = train.iloc[j.reshape(N, )]['t'].values.reshape(1, N)
x_i = train.iloc[i.reshape(N, )]['x'].values.reshape(N, 1)
x_j = train.iloc[j.reshape(N, )]['x'].values.reshape(1, N)
y_i = train.iloc[i.reshape(N, )]['y'].values.reshape(N, 1)
y_j = train.iloc[j.reshape(N, )]['y'].values.reshape(1, N)
distance = (x_j - x_i)**2 + (y_j - y_i)**2
time_check = t_i < t_j
origin_check = sp.logical_and((x_i != x_j), (y_i != y_j))
trigger_check = time_check * origin_check
t_diff = t_j - t_i
best_params = None
best_likelihood = None
for _ in range(num_restarts):
# Initialize parameters to random values
# Parameters for triggering kernel
omega = sp.absolute(stats.norm.rvs(scale=0.10)) # time decay
sigma = sp.absolute(sp.randn()) # spatial decay
# Parameter for background rate
eta = sp.absolute(sp.randn())
# Loop until convergence
for step in tqdm(range(steps)):
old_parameters = sp.stack([omega, sigma, eta])
# E-step: Calculate p matrices according to equations (9) and (10)
# "[P and P^b] contain the probabilities that event i triggered
# homicide j through either the triggering kernel g or the
# background rate kernel"
p_aftershock = trigger_check * omega * sp.exp(-omega * t_diff) \
* stats.norm.pdf(distance, scale=sigma)
p_background = origin_check * stats.norm.pdf(distance,
scale=eta)
# Normalize as necessary
Z = p_aftershock + p_background # also used for likelihood
nonzero_Z = Z > 0
p_aftershock[nonzero_Z] /= Z[nonzero_Z]
p_background[nonzero_Z] /= T * Z[nonzero_Z]
# M-step: Update parameters
aftershock_sum = sp.sum(p_aftershock)
time_gaps = T - t_i
omega_denom = sp.sum(p_aftershock * (t_j - t_i)) \
+ sp.sum(time_gaps * sp.exp(-omega * time_gaps))
omega = aftershock_sum / omega_denom
sigma = sp.sum(
p_aftershock * distance) / (2.0 * aftershock_sum)
eta = sp.sum(
p_background * distance) / (2.0 * sp.sum(p_background))
diff = sp.absolute(old_parameters -
sp.stack([omega, sigma, eta])).max()
if diff < eps:
print("Convergence met after {} iterations: {}".format(
step, sp.sum(Z)))
break
# Check the likelihood given the discovered parameter values by
# summing over Z
likelihood = sp.sum(Z)
if best_likelihood is None or likelihood > best_likelihood:
best_params = omega, sigma, eta
best_likelihood = likelihood
self.p_aftershock, self.p_background = p_aftershock, p_background
self.omega, self.sigma, self.eta = best_params
return self
asig = Seg.analogsignals[0]
fig, axes = plt.subplots(ncols=nEvents,figsize=[6,2.5])
t_slice = (-2,2) * pq.s
for i, event in enumerate(Events[:-1]):
asig_slices = []
for t in event.times:
try:
asig_slice = asig.time_slice(t+t_slice[0],t+t_slice[1])
tvec = asig_slice.times - t
# axes[i].plot(tvec, asig_slice, 'k', alpha=0.25,lw=1)
asig_slices.append(asig_slice)
except ValueError:
pass
# average:
avg = sp.stack([asig_slice.magnitude for asig_slice in asig_slices],axis=1).mean(axis=1)
axes[i].plot(tvec,avg,'r')
axes[i].plot(Kernels.times,Kernels[:,i],'C%i'%i)
axes[i].set_xlabel('time (s)')
axes[0].set_ylabel('signal (au)')
fig.suptitle('event triggered average')
sns.despine(fig)
fig.tight_layout(rect=[0, 0.03, 1, 0.95])
# %%
"""
## ## ## ## ### ##
## ## ## ## ## ## ##
T = 20
N = 100
M = 200
target_dir = os.path.join('data', 'bouncing_balls_ds0p1')
os.makedirs(target_dir, exist_ok=True)
nrof_balls = 1
for j in range(M):
print('.', end='')
sys.stdout.flush()
dat = scipy.empty((N), dtype=object)
for i in range(N):
dat[i] = bounce_vec(res=res,
n=nrof_balls,
T=T,
diffusion_stdev=diffusion_stdev)
data = np.reshape(scipy.stack(dat), (N, T, res, res))
utils.save_pickle(os.path.join(target_dir, 'train_%03d.pkl' % j), data)
print('\nDone')
N = 100
M = 10
dat = scipy.empty((N), dtype=object)
for j in range(M):
for i in range(N):
dat[i] = bounce_vec(res=res,
n=nrof_balls,
T=T,
diffusion_stdev=diffusion_stdev)
data = np.reshape(scipy.stack(dat), (N, T, res, res))
utils.save_pickle(os.path.join(target_dir, 'test_%03d.pkl' % j), data)
