def test_coordinate_transforms(nevents, nparticles):
p4s = ef.gen_random_events(nevents, nparticles, dim=4,
mass='random').reshape(nevents, nparticles, 4)
ptyphims = ef.ptyphims_from_p4s(p4s)
new_p4s = ef.p4s_from_ptyphims(ptyphims)
assert epsilon_diff(p4s, new_p4s, 1e-11)
def test_efp_kappa_hadr(event, beta, kappa, normed, kappa_normed_behavior):
asymbox_graph = [(0,1),(0,1),(1,2),(1,2),(1,2),(2,3),(2,3),(2,3),(2,3),(3,0),(0,3),(3,0)]
efp_result = ef.EFP(asymbox_graph, measure='hadr', beta=beta, kappa=kappa,
normed=normed, coords='epxpypz',
kappa_normed_behavior=kappa_normed_behavior).compute(event)
pts, ys, phis, ms = ef.ptyphims_from_p4s(event).T
thetas = np.asarray([[(ys[i]-ys[j])**2 + min(abs(phis[i]-phis[j]), 2*np.pi-abs(phis[i]-phis[j]))**2
for i in range(len(event))] for j in range(len(event))])**(beta/2)
zs = pts**kappa
if normed and kappa_normed_behavior == 'orig':
zs /= np.sum(zs)
if normed and kappa_normed_behavior == 'new':
zs /= np.sum(pts)**kappa
asymbox = 0
for i1 in range(len(zs)):
for i2 in range(len(zs)):
for i3 in range(len(zs)):
for i4 in range(len(zs)):
asymbox += (zs[i1]*zs[i2]*zs[i3]*zs[i4]*thetas[i1,i2]**2*
thetas[i2,i3]**3*thetas[i3,i4]**4*thetas[i1,i4]**3)
assert epsilon_percent(asymbox, efp_result, epsilon=10**-13)
def test_etas_from_pts_ys_ms(nevents, nparticles):
p4s = ef.gen_random_events(nevents, nparticles, dim=4,
mass='random').reshape(nevents, nparticles, 4)
ptyphims = ef.ptyphims_from_p4s(p4s)
etas = ef.etas_from_p4s(p4s)
etas_primes = ef.etas_from_pts_ys_ms(ptyphims[..., 0], ptyphims[..., 1],
ptyphims[..., 3])
assert epsilon_diff(etas, etas_primes, 1e-12)
# test cutoff
pts, ms = 1000 * np.random.rand(25), 10 * np.random.rand(25)
ys = np.random.choice([-1., 1.], size=25) * 100 * np.random.rand(25)
for c1, c2 in zip(np.linspace(20, 100, 5), 20 + 80 * np.random.rand(5)):
etas_c1 = ef.etas_from_pts_ys_ms(pts, ys, ms, _cutoff=c1)
etas_c2 = ef.etas_from_pts_ys_ms(pts, ys, ms, _cutoff=c2)
assert epsilon_diff(etas_c1, etas_c2, 1e-12)
def test_shapes_from_ptyphis(method, nevents, nparticles):
p4s = ef.gen_random_events(nevents, nparticles, dim=4,
mass='random').reshape(nevents, nparticles, 4)
ptyphims = ef.ptyphims_from_p4s(p4s)
func = getattr(ef, method)
if 'ms' in method:
for end in [3, 4]:
results = func(ptyphims[..., :end])
assert epsilon_diff(results[0], func(ptyphims[0, ..., :end]))
elif 'pids' in method:
ptyphims[..., 3] = (
np.random.choice([-1., 1.], size=(nevents, nparticles)) *
np.random.choice(list(
ef.utils.particle_utils.PARTICLE_MASSES.keys()),
size=(nevents, nparticles)))
results = func(ptyphims)
assert epsilon_diff(results[0], func(ptyphims[0]))
def test_sum_ptyphims(nparticles, scheme):
p4s = ef.gen_random_events(10, nparticles, dim=4, mass='random')
ptyphims = ef.ptyphims_from_p4s(p4s)
if scheme == 'escheme':
for ev_p4s, ev_ptyphims in zip(p4s, ptyphims):
tot = ef.p4s_from_ptyphims(
ef.sum_ptyphims(ev_ptyphims, scheme=scheme))
tot_p4 = ev_p4s.sum(axis=0)
assert epsilon_diff(tot, tot_p4, 10**-12)
elif scheme == 'ptscheme':
for ev_ptyphims in ptyphims:
tot = ef.sum_ptyphims(ev_ptyphims, scheme=scheme)
pt = ev_ptyphims[:, 0].sum()
y = np.sum(ev_ptyphims[:, 0] * ev_ptyphims[:, 1]) / pt
phi = np.sum(ev_ptyphims[:, 0] * ev_ptyphims[:, 2]) / pt
assert epsilon_diff(tot, np.array([pt, y, phi]), 10**-12)
def fit_pfn(self, model_settings):
# convert labels to categorical
Y_PFN = energyflow.utils.to_categorical(self.y, num_classes=2)
# preprocess by centering jets and normalizing pts
X_PFN = self.X_particles
for x_PFN in X_PFN:
mask = x_PFN[:, 0] > 0
yphi_avg = np.average(x_PFN[mask, 1:3],
weights=x_PFN[mask, 0],
axis=0)
x_PFN[mask, 1:3] -= yphi_avg
x_PFN[mask, 0] /= x_PFN[:, 0].sum()
# Convert (E,px,py,pz) to (pT,y,phi,m)
X_PFN = energyflow.ptyphims_from_p4s(
self.X_particles
)[:, :, :] # Note: 4th entry is m, not PID .. could rewrite routine
# handle particle id channel !! Note: If changed to pT,y,phi,m the 4th component is not PID but m .. fix later
#if model_settings['use_pids']:
# self.my_remap_pids(X_PFN)
#else:
# X_PFN = X_PFN[:,:,:3]
# Split data into train, val and test sets
(X_PFN_train, X_PFN_val, X_PFN_test, Y_PFN_train, Y_PFN_val,
Y_PFN_test) = energyflow.utils.data_split(X_PFN,
Y_PFN,
val=self.n_val,
test=self.n_test)
# build architecture
pfn = energyflow.archs.PFN(input_dim=X_PFN.shape[-1],
Phi_sizes=model_settings['Phi_sizes'],
F_sizes=model_settings['F_sizes'])
# train model
pfn.fit(X_PFN_train,
Y_PFN_train,
epochs=model_settings['epochs'],
batch_size=model_settings['batch_size'],
validation_data=(X_PFN_val, Y_PFN_val),
verbose=1)
# get predictions on test data
preds_PFN = pfn.predict(X_PFN_test, batch_size=1000)
# Get AUC and ROC curve + make plot
auc_PFN = sklearn.metrics.roc_auc_score(Y_PFN_test[:, 1], preds_PFN[:,
1])
print('Particle Flow Networks/Deep Sets: AUC = {} (test set)'.format(
auc_PFN))
self.roc_curve_dict['PFN'] = sklearn.metrics.roc_curve(
Y_PFN_test[:, 1], preds_PFN[:, 1])
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# Now we compare the PFN ROC curve to single observables
# 1. Jet mass (Note: This takes in (pt,y,phi) and converts it to 4-vectors and computes jet mass)
# (Note: X_PFN_train is centered and normalized .. should be ok)
masses = np.asarray([
energyflow.ms_from_p4s(
energyflow.p4s_from_ptyphims(x).sum(axis=0))
for x in X_PFN_train
])
self.roc_curve_dict['Jet_mass'] = sklearn.metrics.roc_curve(
Y_PFN_train[:, 1], -masses)
# 2. Multiplicity (Is this a useful observable for pp vs AA?)
mults = np.asarray([np.count_nonzero(x[:, 0]) for x in X_PFN_train])
self.roc_curve_dict['Multiplicity'] = sklearn.metrics.roc_curve(
Y_PFN_train[:, 1], -mults)
