def exercise_ls_cycles(self):
xs = self.xray_structure.deep_copy_scatterers()
connectivity_table = smtbx.utils.connectivity_table(xs)
emma_ref = xs.as_emma_model()
# shaking must happen before the reparametrisation is constructed,
# otherwise the original values will prevail
xs.shake_sites_in_place(rms_difference=0.1)
reparametrisation = constraints.reparametrisation(
structure=xs,
constraints=[],
connectivity_table=connectivity_table)
ls = least_squares.crystallographic_ls(
self.fo_sq.as_xray_observations(), reparametrisation,
weighting_scheme=least_squares.mainstream_shelx_weighting(a=0),
origin_fixing_restraints_type=
origin_fixing_restraints.atomic_number_weighting)
cycles = normal_eqns_solving.naive_iterations(
ls,
gradient_threshold=1e-12,
step_threshold=1e-7,
track_all=True)
assert approx_equal(ls.scale_factor(), 1, eps=1e-5), ls.scale_factor()
assert approx_equal(ls.objective(), 0), ls.objective()
match = emma.model_matches(emma_ref, xs.as_emma_model()).refined_matches[0]
assert match.rt.r == matrix.identity(3)
for pair in match.pairs:
assert approx_equal(match.calculate_shortest_dist(pair), 0, eps=1e-4)
def exercise_ls_cycles(self):
xs = self.xray_structure.deep_copy_scatterers()
connectivity_table = smtbx.utils.connectivity_table(xs)
emma_ref = xs.as_emma_model()
# shaking must happen before the reparametrisation is constructed,
# otherwise the original values will prevail
xs.shake_sites_in_place(rms_difference=0.1)
reparametrisation = constraints.reparametrisation(
structure=xs,
constraints=[],
connectivity_table=connectivity_table)
ls = least_squares.crystallographic_ls(
self.fo_sq.as_xray_observations(), reparametrisation,
weighting_scheme=least_squares.unit_weighting(),
origin_fixing_restraints_type=
origin_fixing_restraints.atomic_number_weighting)
cycles = normal_eqns_solving.naive_iterations(
ls,
n_max_iterations=5,
track_all=True)
assert approx_equal(ls.scale_factor(), 1, eps=1e-5)
assert approx_equal(ls.objective(), 0)
# skip next-to-last one to allow for no progress and rounding error
assert (
cycles.objective_history[0]
>= cycles.objective_history[1]
>= cycles.objective_history[3]), numstr(cycles.objective_history)
assert approx_equal(cycles.gradient_norm_history[-1], 0, eps=5e-8)
match = emma.model_matches(emma_ref, xs.as_emma_model()).refined_matches[0]
assert match.rt.r == matrix.identity(3)
for pair in match.pairs:
assert approx_equal(match.calculate_shortest_dist(pair), 0, eps=1e-4)
def exercise_ls_cycles(self):
xs = self.xray_structure.deep_copy_scatterers()
connectivity_table = smtbx.utils.connectivity_table(xs)
emma_ref = xs.as_emma_model()
# shaking must happen before the reparametrisation is constructed,
# otherwise the original values will prevail
xs.shake_sites_in_place(rms_difference=0.1)
reparametrisation = constraints.reparametrisation(
structure=xs,
constraints=[],
connectivity_table=connectivity_table)
ls = least_squares.crystallographic_ls(
self.fo_sq.as_xray_observations(), reparametrisation,
weighting_scheme=least_squares.mainstream_shelx_weighting(a=0),
origin_fixing_restraints_type=
origin_fixing_restraints.atomic_number_weighting)
cycles = normal_eqns_solving.naive_iterations(
ls,
gradient_threshold=1e-12,
step_threshold=1e-7,
track_all=True)
assert approx_equal(ls.scale_factor(), 1, eps=1e-5), ls.scale_factor()
assert approx_equal(ls.objective(), 0), ls.objective()
match = emma.model_matches(emma_ref, xs.as_emma_model()).refined_matches[0]
assert match.rt.r == matrix.identity(3)
for pair in match.pairs:
assert approx_equal(match.calculate_shortest_dist(pair), 0, eps=1e-4)
def get_substruct_matches(substruct_dict, spacegroups, nsites, ano_rlimits):
'''Run EMMA on all pairs of substructure models found for different HA number/resolution
combinations for the given space group'''
ha_dict = {}
for spgr in spacegroups:
sbm = [
substruct_dict[(spgr, nsite, rlimit)]
for (nsite, rlimit) in product(nsites, ano_rlimits)
]
ha_dict[spgr] = [[0] * len(mod.scatterers()) if mod else []
for mod in sbm]
for idx1, idx2 in combinations(range(len(sbm)), 2):
em1, em2 = sbm[idx1], sbm[idx2]
try:
emma_matches = emma.model_matches(
em1.as_emma_model(),
em2.as_emma_model(),
tolerance=0.5,
break_if_match_with_no_singles=False)
best_match = next(iter(emma_matches.refined_matches))
for ha_em1, ha_em2 in best_match.pairs:
ha_dict[spgr][idx1][ha_em1] += 1
ha_dict[spgr][idx2][ha_em2] += 1
except AttributeError:
continue
except StopIteration:
continue
return ha_dict
def exercise(self, fixed_twin_fraction):
# Create a shaken structure xs ready for refinement
xs0 = self.structure
emma_ref = xs0.as_emma_model()
xs = xs0.deep_copy_scatterers()
xs.shake_sites_in_place(rms_difference=0.15)
xs.shake_adp()
for sc in xs.scatterers():
sc.flags.set_use_u_iso(False).set_use_u_aniso(True)
sc.flags.set_grad_site(True).set_grad_u_aniso(True)
# Setup L.S. problem
connectivity_table = smtbx.utils.connectivity_table(xs)
shaken_twin_fraction = (self.twin_fraction if fixed_twin_fraction else
self.twin_fraction +
0.1 * flex.random_double())
# 2nd domain in __init__
twin_components = (xray.twin_component(twin_law=self.twin_law.r(),
value=shaken_twin_fraction,
grad=not fixed_twin_fraction), )
reparametrisation = constraints.reparametrisation(
structure=xs,
constraints=[],
connectivity_table=connectivity_table,
twin_fractions=twin_components)
obs = self.fo_sq.as_xray_observations(twin_components=twin_components)
ls = least_squares.crystallographic_ls(
obs,
reparametrisation,
weighting_scheme=least_squares.unit_weighting(),
origin_fixing_restraints_type=origin_fixing_restraints.
atomic_number_weighting)
# Refine till we get back the original structure (so we hope)
cycles = normal_eqns_solving.levenberg_marquardt_iterations(
ls, gradient_threshold=1e-12, step_threshold=1e-6, track_all=True)
# Now let's start to check it all worked
assert ls.n_parameters == 63 if fixed_twin_fraction else 64
match = emma.model_matches(emma_ref,
xs.as_emma_model()).refined_matches[0]
assert match.rt.r == matrix.identity(3)
for pair in match.pairs:
assert approx_equal(match.calculate_shortest_dist(pair),
0,
eps=1e-4), pair
if fixed_twin_fraction:
assert ls.twin_fractions[0].value == self.twin_fraction
else:
assert approx_equal(ls.twin_fractions[0].value,
self.twin_fraction,
eps=1e-2)
assert approx_equal(ls.scale_factor(), 1, eps=1e-5)
assert approx_equal(ls.objective(), 0)
def exercise(self, fixed_twin_fraction):
# Create a shaken structure xs ready for refinement
xs0 = self.structure
emma_ref = xs0.as_emma_model()
xs = xs0.deep_copy_scatterers()
xs.shake_sites_in_place(rms_difference=0.15)
xs.shake_adp()
for sc in xs.scatterers():
sc.flags.set_use_u_iso(False).set_use_u_aniso(True)
sc.flags.set_grad_site(True).set_grad_u_aniso(True)
# Setup L.S. problem
connectivity_table = smtbx.utils.connectivity_table(xs)
shaken_twin_fraction = (
self.twin_fraction if fixed_twin_fraction else
self.twin_fraction + 0.1*flex.random_double())
# 2nd domain in __init__
twin_components = (xray.twin_component(
twin_law=self.twin_law.r(), value=shaken_twin_fraction,
grad=not fixed_twin_fraction),)
reparametrisation = constraints.reparametrisation(
structure=xs,
constraints=[],
connectivity_table=connectivity_table,
twin_fractions=twin_components)
obs = self.fo_sq.as_xray_observations(twin_components=twin_components)
ls = least_squares.crystallographic_ls(
obs, reparametrisation,
weighting_scheme=least_squares.unit_weighting(),
origin_fixing_restraints_type=
origin_fixing_restraints.atomic_number_weighting)
# Refine till we get back the original structure (so we hope)
cycles = normal_eqns_solving.levenberg_marquardt_iterations(
ls,
gradient_threshold=1e-12,
step_threshold=1e-6,
track_all=True)
# Now let's start to check it all worked
assert ls.n_parameters == 63 if fixed_twin_fraction else 64
match = emma.model_matches(emma_ref, xs.as_emma_model()).refined_matches[0]
assert match.rt.r == matrix.identity(3)
for pair in match.pairs:
assert approx_equal(match.calculate_shortest_dist(pair), 0, eps=1e-4), pair
if fixed_twin_fraction:
assert ls.twin_fractions[0].value == self.twin_fraction
else:
assert approx_equal(ls.twin_fractions[0].value, self.twin_fraction,
eps=1e-2)
assert approx_equal(ls.scale_factor(), 1, eps=1e-5)
assert approx_equal(ls.objective(), 0)
def best_superpositions_on_other(
self,
other_model,
tolerance=1.5,
models_are_diffraction_index_equivalent=True,
break_if_match_with_no_singles=True,
f=sys.stdout,
specifically_test_inverse=True):
# 2013-01-25 tt.Find best match to other_model and return it
# 2013-01-19 return list of best ones (can be alternatives)
# if you want the superposed model use:
# superposed_model2=match.get_transformed_model2(
# template=other_model)
if not hasattr(self, 'match_dict'):
self.match_dict = {}
match_list = None
else:
match_list = self.match_dict.get(other_model, None)
if match_list is None: # need to get it
from cctbx import euclidean_model_matching as emma
test_list = [other_model]
match_list = []
if specifically_test_inverse:
from copy import deepcopy
inv_other_model = other_model.change_hand()
inv_other_model._cb_op = deepcopy(other_model._cb_op)
test_list.append(inv_other_model)
for test_model in test_list:
matches = emma.model_matches(
model1 = self,
model2 = test_model,
tolerance = tolerance,
models_are_diffraction_index_equivalent = \
models_are_diffraction_index_equivalent,
break_if_match_with_no_singles=break_if_match_with_no_singles,
)
if (matches.n_matches() > 0):
best_number_of_matches = len(
matches.refined_matches[0].pairs)
for match in matches.refined_matches:
n = len(match.pairs)
if n > 0 and n >= best_number_of_matches:
match_list.append(match)
self.match_dict[other_model] = match_list # save it
if not match_list: match_list = [None]
return match_list
def best_superpositions_on_other(self, other_model, tolerance = 1.5,
models_are_diffraction_index_equivalent = True,
break_if_match_with_no_singles=True, f=sys.stdout,
specifically_test_inverse=True):
# 2013-01-25 tt.Find best match to other_model and return it
# 2013-01-19 return list of best ones (can be alternatives)
# if you want the superposed model use:
# superposed_model2=match.get_transformed_model2(
# template=other_model)
if not hasattr(self,'match_dict'):
self.match_dict={}
match_list=None
else:
match_list=self.match_dict.get(other_model,None)
if match_list is None: # need to get it
from cctbx import euclidean_model_matching as emma
test_list=[other_model]
match_list=[]
if specifically_test_inverse:
from copy import deepcopy
inv_other_model=other_model.change_hand()
inv_other_model._cb_op=deepcopy(other_model._cb_op)
test_list.append(inv_other_model)
for test_model in test_list:
matches = emma.model_matches(
model1 = self,
model2 = test_model,
tolerance = tolerance,
models_are_diffraction_index_equivalent = \
models_are_diffraction_index_equivalent,
break_if_match_with_no_singles=break_if_match_with_no_singles,
)
if (matches.n_matches() > 0):
best_number_of_matches=len(matches.refined_matches[0].pairs)
for match in matches.refined_matches:
n=len(match.pairs)
if n > 0 and n >= best_number_of_matches:
match_list.append(match)
self.match_dict[other_model]=match_list # save it
if not match_list: match_list=[None]
return match_list
def exercise_one_structure(
target_structure,
flipping_type,
anomalous_flag,
d_min,
grid_resolution_factor=1. / 2,
verbose=False,
amplitude_type="F",
):
assert amplitude_type in ('F', 'E', 'quasi-E')
# Generate its structure factors
f_target = miller.build_set(
crystal_symmetry=target_structure,
anomalous_flag=target_structure.scatterers().count_anomalous() != 0,
d_min=d_min).structure_factors_from_scatterers(
xray_structure=target_structure, algorithm="direct").f_calc()
f_target_in_p1 = f_target.expand_to_p1()\
.as_non_anomalous_array()\
.merge_equivalents().array()
f_obs = f_target.as_amplitude_array()
# Unleash charge flipping on the amplitudes
flipping = flipping_type(delta=None)
extra = group_args()
if amplitude_type == 'E':
extra.normalisations_for = lambda f: f.amplitude_normalisations(
target_structure.unit_cell_content(omit=('H', 'D')))
elif amplitude_type == 'quasi-E':
extra.normalisations_for = charge_flipping.amplitude_quasi_normalisations
solving = charge_flipping.solving_iterator(
flipping,
f_obs,
yield_during_delta_guessing=True,
yield_solving_interval=1,
**extra.__dict__)
s = StringIO()
charge_flipping.loop(solving, verbose="highly", out=s)
if verbose:
print s.getvalue()
# check whether a phase transition has occured
assert solving.had_phase_transition
flipping = solving.flipping_iterator
f_result_in_p1 = solving.flipping_iterator.f_calc
# Euclidean matching of the peaks from the obtained map
# against those of the correct structure (in P1)
target_structure = target_structure.select(
target_structure.scattering_types() == "H", negate=True)
target_structure_in_p1 = target_structure.expand_to_p1()
search_parameters = maptbx.peak_search_parameters(
interpolate=True,
min_distance_sym_equiv=1.,
max_clusters=int(target_structure_in_p1.scatterers().size() * 1.2))
peak_search_outcome = flipping.rho_map.peak_search(search_parameters)
peak_structure = emma.model(
target_structure_in_p1.crystal_symmetry().special_position_settings(),
positions=[
emma.position('Q%i' % i, x)
for i, x in enumerate(peak_search_outcome.all().sites())
])
refined_matches = emma.model_matches(
target_structure_in_p1.as_emma_model(),
peak_structure,
tolerance=0.5,
break_if_match_with_no_singles=False).refined_matches
m = refined_matches[0]
assert m.rms < 0.2, m.rms # no farther than that
assert m.rt.r in (mat.identity(3), mat.inversion(3))
reference_shift = -refined_matches[0].rt.t
# Find the translation to bring back the structure to the same space-group
# setting as the starting f_obs from correlation map analysis
is_allowed = lambda x: f_target.space_group_info().is_allowed_origin_shift(
x, tolerance=0.1)
first_correct_correlation_peak = None
for i, (f_calc, shift,
cc_peak_height) in enumerate(solving.f_calc_solutions):
if (is_allowed(shift - reference_shift)
or is_allowed(shift + reference_shift)):
first_correct_correlation_peak = i
break
else:
if verbose == "more":
print "++ Incorrect peak: shift=(%.3f, %.3f, %.3f), height=%.2f"\
% (tuple(shift)+(cc_peak_height,))
print " Reference shift=(%.3f, %.3f, %.3f)" % tuple(
reference_shift)
assert first_correct_correlation_peak is not None
if verbose and first_correct_correlation_peak != 0:
print "** First correct correlation peak: #%i (%.3f) **"\
% (first_correct_correlation_peak, cc_peak_height)
# check Euclidean matching in the original space-group
search_parameters = maptbx.peak_search_parameters(
interpolate=True,
min_distance_sym_equiv=1.,
max_clusters=int(1.5 * target_structure.scatterers().size()))
solution_fft_map = f_calc.fft_map(
symmetry_flags=maptbx.use_space_group_symmetry)
solution_peaks = solution_fft_map.peak_search(search_parameters,
verify_symmetry=False)
solution_peak_structure = emma.model(
target_structure.crystal_symmetry().special_position_settings(),
positions=[
emma.position('Q%i' % i, x)
for i, x in enumerate(solution_peaks.all().sites())
])
refined_matches = emma.model_matches(
target_structure.as_emma_model(),
solution_peak_structure,
break_if_match_with_no_singles=False).refined_matches
assert refined_matches
m = refined_matches[0]
assert not m.singles1, m.show() # all sites match a peak
assert m.rms < 0.15, m.rms # no farther than that
assert m.rt.r in (mat.identity(3), mat.inversion(3))
# success!
if verbose:
print "@@ Success @@"
def run():
command_line = (option_parser(
usage="usage: cctbx.euclidean_model_matching [OPTIONS] "
"reference_structure.pickle structure.pickle",
description="").option("--tolerance", type="float",
default=3).option(
"--match_hydrogens",
type='bool',
default=True)).process(args=sys.argv[1:])
if len(command_line.args) != 2:
command_line.parser.print_help()
sys.exit(1)
reference_structure = easy_pickle.load(command_line.args[0])
if (type(reference_structure) in (type([]), type(()))):
reference_structure = reference_structure[0]
structures = easy_pickle.load(command_line.args[1])
if (not type(structures) in (type([]), type(()))):
structures = [structures]
if not command_line.options.match_hydrogens:
reference_structure.select_inplace(
~reference_structure.element_selection('H'))
for structure in structures:
structure.select_inplace(~structure.element_selection('H'))
print "Reference model:"
reference_structure.show_summary()
print
reference_model = reference_structure.as_emma_model()
match_list = []
match_histogram = dicts.with_default_value(0)
for structure in structures:
structure.show_summary()
if (hasattr(structure, "info")):
print structure.info
print
sys.stdout.flush()
refined_matches = emma.model_matches(
reference_model,
structure.as_emma_model(),
tolerance=command_line.options.tolerance,
models_are_diffraction_index_equivalent=False,
break_if_match_with_no_singles=True).refined_matches
if (len(refined_matches)):
refined_matches[0].show()
m = len(refined_matches[0].pairs)
else:
print "No matches"
m = 0
match_list.append(match_record(m, structure.scatterers().size()))
match_histogram[m] += 1
print
sys.stdout.flush()
print "match_list:", match_list
keys = match_histogram.keys()
keys.sort()
keys.reverse()
print "matches: frequency"
sum = 0
for key in keys:
v = match_histogram[key]
sum += v
s = 0
for key in keys:
v = match_histogram[key]
s += v
print " %3d: %3d = %5.1f%%, %5.1f%%" % (key, v, 100. * v / sum,
100. * s / sum)
print
sys.stdout.flush()
def run_test(space_group_info, n_elements=5, d_min=1.5,
grid_resolution_factor=1./3, max_prime=5, verbose=0):
structure = random_structure.xray_structure(
space_group_info,
elements=["Si"]*n_elements,
volume_per_atom=200,
min_distance=3.,
general_positions_only=False)
miller_set_f_obs = miller.build_set(
crystal_symmetry=structure,
anomalous_flag=(random.random()>0.5),
d_min=d_min)
f_obs = miller_set_f_obs.structure_factors_from_scatterers(
xray_structure=structure,
algorithm="direct").f_calc()
structure_factor_utils.check_phase_restrictions(f_obs, verbose=verbose)
if (0 or verbose):
f_obs.show_summary()
if (0 or verbose):
f_obs.show_array()
fft_map = f_obs.fft_map(
resolution_factor=grid_resolution_factor,
symmetry_flags=maptbx.use_space_group_symmetry)
p = pickle.dumps(fft_map)
l = pickle.loads(p)
s1 = StringIO()
fft_map.statistics().show_summary(f=s1)
s2 = StringIO()
l.statistics().show_summary(f=s2)
assert not show_diff(s2.getvalue(), s1.getvalue())
#
if (not f_obs.anomalous_flag()):
maptbx_fft_map = maptbx.fft_to_real_map_unpadded(
space_group=fft_map.space_group(),
n_real=fft_map.n_real(),
miller_indices=f_obs.indices(),
data=f_obs.data())
fft_map_unpadded = fft_map.real_map_unpadded(in_place=False)
assert approx_equal(
flex.linear_correlation(
fft_map_unpadded.as_1d(), maptbx_fft_map.as_1d()).coefficient(), 1)
assert approx_equal(
flex.max(flex.abs(maptbx_fft_map - fft_map_unpadded)), 0)
#
fft_map.apply_sigma_scaling()
real_map = maptbx.copy(
fft_map.real_map(),
flex.grid(fft_map.real_map().focus()))
grid_tags = maptbx.grid_tags(real_map.focus())
grid_tags.build(
fft_map.space_group_info().type(),
fft_map.symmetry_flags())
assert grid_tags.n_grid_misses() == 0
assert grid_tags.verify(real_map)
rms = []
for interpolate in (False,True):
peak_list = maptbx.peak_list(
data=real_map,
tags=grid_tags.tag_array(),
peak_search_level=1,
max_peaks=2*n_elements,
interpolate=interpolate)
assert peak_list.gridding() == real_map.focus()
check_peaks(structure, peak_list.sites(), d_min * grid_resolution_factor)
crystal_gridding_tags = fft_map.tags()
cluster_analysis = maptbx.peak_cluster_analysis(
peak_list=peak_list,
special_position_settings=structure,
general_positions_only=False,
effective_resolution=d_min,
min_cross_distance=2,
max_clusters=n_elements).all()
check_peaks(
structure,
cluster_analysis.sites(),
cluster_analysis.min_cross_distance() + d_min * grid_resolution_factor)
structure_from_peaks = xray.structure(structure)
for site in cluster_analysis.sites():
structure_from_peaks.add_scatterer(
xray.scatterer(label="site", scattering_type="", site=site))
emma_matches = emma.model_matches(
structure.as_emma_model(),
structure_from_peaks.as_emma_model(),
tolerance=d_min*2)
rms.append(emma_matches.refined_matches[0].rms)
assert len(emma_matches.refined_matches[0].pairs) == n_elements
# exercise interpolation vs. summation
map_coeffs = f_obs.expand_to_p1()
fft_map = f_obs.fft_map(
resolution_factor=grid_resolution_factor,
symmetry_flags=maptbx.use_space_group_symmetry)
fft_map.apply_volume_scaling()
real_map = fft_map.real_map_unpadded()
sum1 = sum2 = 0
for scatterer in structure.scatterers() :
v1 = real_map.eight_point_interpolation(scatterer.site)
v2 = real_map.tricubic_interpolation(scatterer.site)
v3 = map_coeffs.direct_summation_at_point(scatterer.site)
sum1 += abs(v1 - v3.real)
sum2 += abs(v2 - v3.real)
mean_delta_linear = sum1 / n_elements
mean_delta_cubic = sum2 / n_elements
assert (mean_delta_cubic < mean_delta_linear)
if (0 or verbose):
print "emma rms grid, interpolated: %.2f %.2f" % tuple(rms)
assert rms[0] >= rms[1]
map_1 = fft_map.real_map_unpadded(in_place=False)
map_2 = fft_map.real_map_unpadded(in_place=True)
assert (map_1.all_eq(map_2))
def exercise_masks():
mt = flex.mersenne_twister(seed=0)
xs_ref = structure.from_shelx(file=StringIO(YAKRUY_ins))
mi = xs_ref.crystal_symmetry().build_miller_set(d_min=0.5,
anomalous_flag=False)
fo = mi.structure_factors_from_scatterers(
xs_ref, algorithm="direct").f_calc().as_amplitude_array()
k = 0.05 + 10 * mt.random_double()
fo = fo.customized_copy(data=fo.data() * k)
fo2 = fo.f_as_f_sq()
acetonitrile_sel = xs_ref.label_selection('N4', 'C20', 'C21', 'H211',
'H212', 'H213')
xs_no_sol = xs_ref.deep_copy_scatterers().select(acetonitrile_sel,
negate=True)
# check what happens when no voids are found
mask = masks.mask(xs_ref, fo2)
mask.compute(solvent_radius=1.2,
shrink_truncation_radius=1.2,
resolution_factor=1 / 2,
atom_radii_table={
'C': 1.70,
'B': 1.63,
'N': 1.55,
'O': 1.52
})
assert mask.structure_factors() is None
assert mask.n_voids() == 0
assert mask.n_solvent_grid_points() == 0
assert mask.f_mask() is None
assert mask.f_model() is None
assert mask.modified_intensities() is None
assert mask.f_000 is None
s = StringIO()
mask.show_summary(log=s)
assert not show_diff(
s.getvalue(), """\
use_set_completion: False
solvent_radius: 1.20
shrink_truncation_radius: 1.20
van der Waals radii:
B C H N O
1.63 1.70 1.20 1.55 1.52
Total solvent accessible volume / cell = 0.0 Ang^3 [0.0%]
gridding: (30,45,54)
""")
# and now with some voids
fo2_complete = fo2.sort()
fo2_missing_1 = fo2.select_indices(flex.miller_index([
(0, 0, 1),
]),
negate=True)
mt = flex.mersenne_twister(seed=0)
fo2_incomplete = fo2.select(mt.random_bool(fo2.size(), 0.95))
for fo2, use_space_group_symmetry in zip(
(fo2_complete, fo2_complete, fo2_missing_1, fo2_incomplete),
(True, False, True, True)):
if fo2 is fo2_complete: use_set_completion = False
else: use_set_completion = True
mask = masks.mask(xs_no_sol,
fo2,
use_set_completion=use_set_completion)
mask.compute(
solvent_radius=1.2,
shrink_truncation_radius=1.2,
resolution_factor=1 / 3,
#atom_radii_table={'C':1.70, 'B':1.63, 'N':1.55, 'O':1.52},
use_space_group_symmetry=use_space_group_symmetry)
n_voids = flex.max(mask.mask.data) - 1
f_mask = mask.structure_factors()
f_model = mask.f_model()
modified_fo = mask.modified_intensities().as_amplitude_array()
f_obs_minus_f_model = fo.common_set(f_model).f_obs_minus_f_calc(
f_obs_factor=1 / k, f_calc=f_model)
diff_map = miller.fft_map(mask.crystal_gridding, f_obs_minus_f_model)
diff_map.apply_volume_scaling()
stats = diff_map.statistics()
assert n_voids == 2
assert approx_equal(n_voids, mask.n_voids())
assert mask.n_solvent_grid_points() == 42148
if fo2 is fo2_complete:
# check the difference map has no large peaks/holes
assert max(stats.max(), abs(stats.min())) < 0.11
# expected electron count: 44
assert approx_equal(mask.f_000_s, 44, eps=1)
assert modified_fo.r1_factor(mask.f_calc.common_set(modified_fo),
k) < 0.006
assert fo.common_set(fo2).r1_factor(f_model.common_set(fo2), k) < 0.006
s = StringIO()
mask.show_summary(log=s)
assert not show_diff(
s.getvalue(), """\
use_set_completion: True
solvent_radius: 1.20
shrink_truncation_radius: 1.20
van der Waals radii:
C H N O
1.77 1.20 1.50 1.45
Total solvent accessible volume / cell = 146.5 Ang^3 [16.3%]
Total electron count / cell = 43.2
gridding: (45,72,80)
Void #Grid points Vol/A^3 Vol/% Centre of mass (frac) Eigenvectors (frac)
1 21074 73.3 8.1 ( 0.267, 0.461, 0.672) 1 ( 0.982, 0.126, 0.142)
2 (-0.166, 0.206, 0.964)
3 (-0.092, 0.970,-0.223)
2 21074 73.3 8.1 (-0.267, 0.539, 0.328) 1 ( 0.982, 0.126, 0.142)
2 (-0.166, 0.206, 0.964)
3 (-0.092, 0.970,-0.223)
Void Vol/Ang^3 #Electrons
1 73.3 21.6
2 73.3 21.6
""")
cif_block = mask.as_cif_block()
fo2 = fo.f_as_f_sq()
# this bit is necessary until we have constraints, as
# otherwise the hydrogens just disappear into the ether.
xs = xs_no_sol.deep_copy_scatterers()
h_selection = xs.element_selection('H')
orig_flags = xs.scatterer_flags()
flags = orig_flags.deep_copy()
for flag, is_h in zip(flags, h_selection):
if is_h:
flag.set_grads(False)
xs.set_scatterer_flags(flags)
# first refine with no mask
xs = exercise_least_squares(xs, fo2, mask=None)
xs.set_scatterer_flags(orig_flags)
for i in range(1):
# compute improved mask/f_mask
mask = masks.mask(xs, fo2)
mask.compute(solvent_radius=1.2,
shrink_truncation_radius=1.2,
atom_radii_table={
'C': 1.70,
'B': 1.63,
'N': 1.55,
'O': 1.52
},
resolution_factor=1 / 3)
mask.structure_factors()
xs = exercise_least_squares(xs, fo2, mask)
# again exclude hydrogens from tests because of lack of constraints
emma_ref = xs_no_sol.select(h_selection, negate=True).as_emma_model()
match = emma.model_matches(
emma_ref,
xs.select(h_selection, negate=True).as_emma_model()).refined_matches[0]
assert approx_equal(match.rms, 0, eps=1e-3)
def exercise_one_structure(
target_structure,
flipping_type,
anomalous_flag,
d_min,
grid_resolution_factor=1.0 / 2,
verbose=False,
amplitude_type="F",
):
assert amplitude_type in ("F", "E", "quasi-E")
# Generate its structure factors
f_target = (
miller.build_set(
crystal_symmetry=target_structure,
anomalous_flag=target_structure.scatterers().count_anomalous() != 0,
d_min=d_min,
)
.structure_factors_from_scatterers(xray_structure=target_structure, algorithm="direct")
.f_calc()
)
f_target_in_p1 = f_target.expand_to_p1().as_non_anomalous_array().merge_equivalents().array()
f_obs = f_target.as_amplitude_array()
# Unleash charge flipping on the amplitudes
flipping = flipping_type(delta=None)
extra = group_args()
if amplitude_type == "E":
extra.normalisations_for = lambda f: f.amplitude_normalisations(
target_structure.unit_cell_content(omit=("H", "D"))
)
elif amplitude_type == "quasi-E":
extra.normalisations_for = charge_flipping.amplitude_quasi_normalisations
solving = charge_flipping.solving_iterator(
flipping, f_obs, yield_during_delta_guessing=True, yield_solving_interval=1, **extra.__dict__
)
s = StringIO()
charge_flipping.loop(solving, verbose="highly", out=s)
if verbose:
print s.getvalue()
# check whether a phase transition has occured
assert solving.had_phase_transition
flipping = solving.flipping_iterator
f_result_in_p1 = solving.flipping_iterator.f_calc
# Euclidean matching of the peaks from the obtained map
# against those of the correct structure (in P1)
target_structure = target_structure.select(target_structure.scattering_types() == "H", negate=True)
target_structure_in_p1 = target_structure.expand_to_p1()
search_parameters = maptbx.peak_search_parameters(
interpolate=True, min_distance_sym_equiv=1.0, max_clusters=int(target_structure_in_p1.scatterers().size() * 1.2)
)
peak_search_outcome = flipping.rho_map.peak_search(search_parameters)
peak_structure = emma.model(
target_structure_in_p1.crystal_symmetry().special_position_settings(),
positions=[emma.position("Q%i" % i, x) for i, x in enumerate(peak_search_outcome.all().sites())],
)
refined_matches = emma.model_matches(
target_structure_in_p1.as_emma_model(), peak_structure, tolerance=0.5, break_if_match_with_no_singles=False
).refined_matches
m = refined_matches[0]
assert m.rms < 0.2, m.rms # no farther than that
assert m.rt.r in (mat.identity(3), mat.inversion(3))
reference_shift = -refined_matches[0].rt.t
# Find the translation to bring back the structure to the same space-group
# setting as the starting f_obs from correlation map analysis
is_allowed = lambda x: f_target.space_group_info().is_allowed_origin_shift(x, tolerance=0.1)
first_correct_correlation_peak = None
for i, (f_calc, shift, cc_peak_height) in enumerate(solving.f_calc_solutions):
if is_allowed(shift - reference_shift) or is_allowed(shift + reference_shift):
first_correct_correlation_peak = i
break
else:
if verbose == "more":
print "++ Incorrect peak: shift=(%.3f, %.3f, %.3f), height=%.2f" % (tuple(shift) + (cc_peak_height,))
print " Reference shift=(%.3f, %.3f, %.3f)" % tuple(reference_shift)
assert first_correct_correlation_peak is not None
if verbose and first_correct_correlation_peak != 0:
print "** First correct correlation peak: #%i (%.3f) **" % (first_correct_correlation_peak, cc_peak_height)
# check Euclidean matching in the original space-group
search_parameters = maptbx.peak_search_parameters(
interpolate=True, min_distance_sym_equiv=1.0, max_clusters=int(1.5 * target_structure.scatterers().size())
)
solution_fft_map = f_calc.fft_map(symmetry_flags=maptbx.use_space_group_symmetry)
solution_peaks = solution_fft_map.peak_search(search_parameters, verify_symmetry=False)
solution_peak_structure = emma.model(
target_structure.crystal_symmetry().special_position_settings(),
positions=[emma.position("Q%i" % i, x) for i, x in enumerate(solution_peaks.all().sites())],
)
refined_matches = emma.model_matches(
target_structure.as_emma_model(), solution_peak_structure, break_if_match_with_no_singles=False
).refined_matches
assert refined_matches
m = refined_matches[0]
assert not m.singles1, m.show() # all sites match a peak
assert m.rms < 0.15, m.rms # no farther than that
assert m.rt.r in (mat.identity(3), mat.inversion(3))
# success!
if verbose:
print "@@ Success @@"
def run(args, command_name="phenix.emma"):
command_line = (option_parser(
usage=command_name + " [options]"
+" reference_coordinates other_coordinates",
description="Example: %s model1.pdb model2.sdb" % command_name)
.enable_symmetry_comprehensive()
.option(None, "--output_pdb",
action="store",
type="str",
default="",
help="Output pdb: second model transformed to best match first model",
metavar="STR")
.option(None, "--tolerance",
action="store",
type="float",
default=3.,
help="match tolerance",
metavar="FLOAT")
.option(None, "--diffraction_index_equivalent",
action="store_true",
help="Use only if models are diffraction-index equivalent.")
).process(args=args, nargs=2)
crystal_symmetry = command_line.symmetry
if ( crystal_symmetry.unit_cell() is None
or crystal_symmetry.space_group_info() is None):
for file_name in command_line.args:
crystal_symmetry = crystal_symmetry.join_symmetry(
other_symmetry=crystal_symmetry_from_any.extract_from(
file_name=file_name),
force=False)
output_pdb = command_line.options.output_pdb
if output_pdb:
print "Output pdb:",output_pdb
tolerance = command_line.options.tolerance
print "Tolerance:", tolerance
if (tolerance <= 0.):
raise ValueError, "Tolerance must be greater than zero."
print
diffraction_index_equivalent = \
command_line.options.diffraction_index_equivalent
if (diffraction_index_equivalent):
print "Models are diffraction index equivalent."
print
emma_models = []
for file_name in command_line.args:
emma_models.append(get_emma_model(
file_name=file_name,
crystal_symmetry=crystal_symmetry))
emma_models[0].show("Reference model")
emma_models[1].show("Other model")
for model,label in zip(emma_models, ["reference", "other"]):
if (model.unit_cell() is None):
raise RuntimeError("Unit cell parameters unknown (%s model)." % label)
if (model.space_group_info() is None):
raise RuntimeError("Space group unknown (%s model)." % label)
model_matches = emma.model_matches(
model1=emma_models[0],
model2=emma_models[1],
tolerance=tolerance,
models_are_diffraction_index_equivalent=diffraction_index_equivalent)
if (model_matches.n_matches() == 0):
print "No matches."
print
else:
max_n_pairs = None
first=True
for match in model_matches.refined_matches:
if (max_n_pairs is None or len(match.pairs) > max_n_pairs*0.2):
print "." * 79
print
match.show()
if first and output_pdb: # 2013-01-25 tt
match.get_transformed_model2(output_pdb=output_pdb,
scattering_type="SE",f=sys.stdout)
first=False
if (max_n_pairs is None):
max_n_pairs = len(match.pairs)
def run():
command_line = (option_parser(
usage="usage: cctbx.euclidean_model_matching [OPTIONS] "
"reference_structure.pickle structure.pickle",
description="")
.option("--tolerance",
type="float",
default=3)
.option("--match_hydrogens", type='bool', default=True)
).process(args=sys.argv[1:])
if len(command_line.args) != 2:
command_line.parser.print_help()
sys.exit(1)
reference_structure = easy_pickle.load(command_line.args[0])
if (type(reference_structure) in (type([]), type(()))):
reference_structure = reference_structure[0]
structures = easy_pickle.load(command_line.args[1])
if (not type(structures) in (type([]), type(()))):
structures = [structures]
if not command_line.options.match_hydrogens:
reference_structure.select_inplace(
~reference_structure.element_selection('H'))
for structure in structures:
structure.select_inplace(~structure.element_selection('H'))
print "Reference model:"
reference_structure.show_summary()
print
reference_model = reference_structure.as_emma_model()
match_list = []
match_histogram = dicts.with_default_value(0)
for structure in structures:
structure.show_summary()
if (hasattr(structure, "info")):
print structure.info
print
sys.stdout.flush()
refined_matches = emma.model_matches(
reference_model,
structure.as_emma_model(),
tolerance=command_line.options.tolerance,
models_are_diffraction_index_equivalent=False,
break_if_match_with_no_singles=True).refined_matches
if (len(refined_matches)):
refined_matches[0].show()
m = len(refined_matches[0].pairs)
else:
print "No matches"
m = 0
match_list.append(match_record(m, structure.scatterers().size()))
match_histogram[m] += 1
print
sys.stdout.flush()
print "match_list:", match_list
keys = match_histogram.keys()
keys.sort()
keys.reverse()
print "matches: frequency"
sum = 0
for key in keys:
v = match_histogram[key]
sum += v
s = 0
for key in keys:
v = match_histogram[key]
s += v
print " %3d: %3d = %5.1f%%, %5.1f%%" % (key, v, 100.*v/sum, 100.*s/sum)
print
sys.stdout.flush()
def run_implementation(server_info, inp, status):
if (inp.ucparams_2 == ""):
inp.ucparams_2 = inp.ucparams_1
if (inp.sgsymbol_2 == ""):
inp.sgsymbol_2 = inp.sgsymbol_1
inp.convention_2 = inp.convention_1
tolerance = float(inp.tolerance)
print "Tolerance:", tolerance
if (tolerance <= 0.):
raise ValueError, "Tolerance must be greater than zero."
print
diffraction_index_equivalent = int(inp.diffraction_index_equivalent)
if (diffraction_index_equivalent):
print "Models are diffraction index equivalent."
print
models1 = web_to_models(
inp.ucparams_1,
inp.sgsymbol_1, inp.convention_1,
inp.format_1, inp.coor_type_1, inp.skip_columns_1,
inp.coordinates[0])
model1 = models1.get_next()
assert model1, "Problems reading reference model."
model1.show("Reference model")
if (model_is_too_large(model=model1)):
return
assert not models1.get_next()
if (model1.unit_cell() is None):
raise RuntimeError("Unit cell parameters unknown (reference model).")
if (model1.space_group_info() is None):
raise RuntimeError("Space group unknown (reference model).")
models2 = web_to_models(
inp.ucparams_2,
inp.sgsymbol_2, inp.convention_2,
inp.format_2, inp.coor_type_2, inp.skip_columns_2,
inp.coordinates[1],
other_symmetry=model1)
while 1:
print "#" * 79
print
model2 = models2.get_next()
if (not model2): break
model2.show(model2.label)
assert model2.unit_cell() is not None
assert model2.space_group_info() is not None
if (model_is_too_large(model=model2)):
continue
sys.stdout.flush()
model_matches = emma.model_matches(
model1=model1,
model2=model2,
tolerance=tolerance,
models_are_diffraction_index_equivalent=diffraction_index_equivalent)
if (model_matches.n_matches() == 0):
print "No matches."
print
else:
for match in model_matches.refined_matches:
print "." * 79
print
match.show()
if len(emma_models) == 2 and os.path.isfile(file_name):
try:
second_model_as_pdb_inp = iotbx.pdb.input(file_name=file_name)
except Exception, e:
pass
emma_models[0].show("Reference model")
emma_models[1].show("Other model")
for model, label in zip(emma_models, ["reference", "other"]):
if (model.unit_cell() is None):
raise RuntimeError("Unit cell parameters unknown (%s model)." %
label)
if (model.space_group_info() is None):
raise RuntimeError("Space group unknown (%s model)." % label)
model_matches = emma.model_matches(
model1=emma_models[0],
model2=emma_models[1],
tolerance=tolerance,
models_are_diffraction_index_equivalent=diffraction_index_equivalent)
if (model_matches.n_matches() == 0):
print "No matches."
print
else:
max_n_pairs = None
first = True
for match in model_matches.refined_matches:
if (max_n_pairs is None or len(match.pairs) > max_n_pairs * 0.2):
print "." * 79
print
match.show()
if first and output_pdb: # 2013-01-25 tt
if second_model_as_pdb_inp:
def run(args, command_name="phenix.emma"):
command_line = (option_parser(
usage=command_name + " [options]" +
" reference_coordinates other_coordinates",
description="Example: %s model1.pdb model2.sdb" % command_name
).enable_symmetry_comprehensive().option(
None,
"--output_pdb",
action="store",
type="str",
default="",
help="Output pdb: second model transformed to best match first model",
metavar="STR").option(
None,
"--tolerance",
action="store",
type="float",
default=3.,
help="match tolerance",
metavar="FLOAT").option(
None,
"--diffraction_index_equivalent",
action="store_true",
help="Use only if models are diffraction-index equivalent.")
).process(args=args, nargs=2)
crystal_symmetry = command_line.symmetry
if (crystal_symmetry.unit_cell() is None
or crystal_symmetry.space_group_info() is None):
for file_name in command_line.args:
crystal_symmetry = crystal_symmetry.join_symmetry(
other_symmetry=crystal_symmetry_from_any.extract_from(
file_name=file_name),
force=False)
output_pdb = command_line.options.output_pdb
if output_pdb:
print("Output pdb:", output_pdb)
tolerance = command_line.options.tolerance
print("Tolerance:", tolerance)
if (tolerance <= 0.):
raise ValueError("Tolerance must be greater than zero.")
print()
diffraction_index_equivalent = \
command_line.options.diffraction_index_equivalent
if (diffraction_index_equivalent):
print("Models are diffraction index equivalent.")
print()
second_model_as_pdb_inp = None
emma_models = []
for file_name in command_line.args:
emma_models.append(
get_emma_model(file_name=file_name,
crystal_symmetry=crystal_symmetry))
if len(emma_models) == 2 and os.path.isfile(file_name):
try:
second_model_as_pdb_inp = iotbx.pdb.input(file_name=file_name)
except Exception as e:
pass
emma_models[0].show("Reference model")
emma_models[1].show("Other model")
for model, label in zip(emma_models, ["reference", "other"]):
if (model.unit_cell() is None):
raise RuntimeError("Unit cell parameters unknown (%s model)." %
label)
if (model.space_group_info() is None):
raise RuntimeError("Space group unknown (%s model)." % label)
model_matches = emma.model_matches(
model1=emma_models[0],
model2=emma_models[1],
tolerance=tolerance,
models_are_diffraction_index_equivalent=diffraction_index_equivalent)
if (model_matches.n_matches() == 0):
print("No matches.")
print()
else:
max_n_pairs = None
first = True
for match in model_matches.refined_matches:
if (max_n_pairs is None or len(match.pairs) > max_n_pairs * 0.2):
print("." * 79)
print()
match.show()
if first and output_pdb: # 2013-01-25 tt
if second_model_as_pdb_inp:
match.get_transformed_model2(
output_pdb=output_pdb,
template_pdb_inp=second_model_as_pdb_inp,
f=sys.stdout)
else:
print("No output model as input model was not PDB")
first = False
if (max_n_pairs is None):
max_n_pairs = len(match.pairs)
def run_call_back(flags, space_group_info):
verbose = flags.Verbose
if (flags.StaticModels):
model1 = (test_model()
.add_random_positions(2, "A")
.shuffle_positions()
.random_symmetry_mates()
.apply_random_eucl_op()
)
model2 = (test_model()
.add_random_positions(3, "B")
.shuffle_positions()
.random_symmetry_mates()
.apply_random_eucl_op()
.shake_positions()
.random_hand()
)
for i in (0,1):
m1 = model1
if (i): m1 = model1.transform_to_reference_setting().reset_cb_op()
for j in (0,1):
m2 = model2
if (j): m2 = model2.transform_to_reference_setting().reset_cb_op()
if (0 or verbose):
m1.show("Model1(%d)" % (i,))
m2.show("Model2(%d)" % (j,))
model_matches = emma.model_matches(m1, m2, rms_penalty_per_site=0)
analyze_refined_matches(m1, m2, model_matches.refined_matches, verbose)
return False
model_core = test_model(space_group_info)
model1 = (model_core
.add_random_positions(2, "A")
)
model2 = (model_core
.add_random_positions(3, "B")
.shuffle_positions()
.random_symmetry_mates()
.apply_random_eucl_op()
.shake_positions()
.random_hand()
)
if (0 or verbose):
model_core.show("Core")
model1.show("Model1")
model2.show("Model2")
model_matches = emma.model_matches(model1, model2, rms_penalty_per_site=0)
analyze_refined_matches(
model1, model2, model_matches.refined_matches, verbose)
assert model_matches.consensus_model().size() >= model1.size()-2
assert model_matches.consensus_model(i_model=2).size() >= model2.size()-3
model1.expand_to_p1()
model2.as_xray_structure()
for i1,i2,m1,m2 in [(1,2,model1,model2),(2,1,model2,model1)]:
m2_t = model_matches.transform_model(i_model=i2)
assert m1.unit_cell().is_similar_to(m2_t.unit_cell())
assert m1.space_group() == m2_t.space_group()
for pair in model_matches.refined_matches[0].pairs:
site1 = m1.positions()[pair[i1-1]].site
site2 = m2_t.positions()[pair[i2-1]].site
equiv_sites1 = sgtbx.sym_equiv_sites(m1.site_symmetry(site1))
dist_info = sgtbx.min_sym_equiv_distance_info(equiv_sites1, site2)
assert dist_info.dist() < model_matches.tolerance + 1.e-6
site2_closest = dist_info.sym_op() * site2
assert approx_equal(
m1.unit_cell().distance(site1, site2_closest),
dist_info.dist())
if (i1 == 1):
singles = model_matches.refined_matches[0].singles2
else:
singles = model_matches.refined_matches[0].singles1
for i_site2 in singles:
site2 = m2_t.positions()[i_site2].site
for i_site1 in xrange(len(model1.positions())):
site1 = m1.positions()[i_site1].site
equiv_sites1 = sgtbx.sym_equiv_sites(m1.site_symmetry(site1))
dist_info = sgtbx.min_sym_equiv_distance_info(equiv_sites1, site2)
if (dist_info.dist() < model_matches.tolerance - 1.e-6):
ok = False
for pair in model_matches.refined_matches[0].pairs:
if (pair[i1-1] == i_site1):
ok = True
assert ok
def exercise(self):
xs0 = self.structure
xs = xs0.deep_copy_scatterers()
k1, s1, li1, o1, o2 = xs.scatterers()
self.shake_point_group_3(k1)
self.shake_point_group_3(s1)
self.shake_point_group_3(li1)
self.shake_point_group_3(o1)
o2.site = tuple(
[ x*(1 + random.uniform(-self.delta_site, self.delta_site))
for x in o2.site])
o2.u_star = tuple(
[ u*(1 + random.uniform(-self.delta_u_star, self.delta_u_star))
for u in o2.u_star])
for sc in xs.scatterers():
sc.flags.set_use_u_iso(False).set_use_u_aniso(True)
sc.flags.set_grad_site(True).set_grad_u_aniso(True)
connectivity_table = smtbx.utils.connectivity_table(xs)
reparametrisation = constraints.reparametrisation(
structure=xs,
constraints=[],
connectivity_table=connectivity_table)
ls = least_squares.crystallographic_ls(
self.fo_sq.as_xray_observations(), reparametrisation,
weighting_scheme=least_squares.unit_weighting(),
origin_fixing_restraints_type=
origin_fixing_restraints.atomic_number_weighting)
cycles = normal_eqns_solving.naive_iterations(
ls,
gradient_threshold=1e-6,
step_threshold=1e-6,
track_all=True)
## Test whether refinement brought back the shaked structure to its
## original state
match = emma.model_matches(xs0.as_emma_model(),
xs.as_emma_model()).refined_matches[0]
assert match.rt.r == matrix.identity(3)
assert not match.singles1 and not match.singles2
assert match.rms < 1e-6
delta_u_carts= ( xs.scatterers().extract_u_cart(xs.unit_cell())
- xs0.scatterers().extract_u_cart(xs.unit_cell())).norms()
assert flex.abs(delta_u_carts) < 1e-6
assert approx_equal(ls.scale_factor(), 1, eps=1e-4)
## Test covariance matrix
jac_tr = reparametrisation.jacobian_transpose_matching_grad_fc()
cov = ls.covariance_matrix(
jacobian_transpose=jac_tr, normalised_by_goof=False)\
.matrix_packed_u_as_symmetric()
m, n = cov.accessor().focus()
# x,y for point group 3 sites are fixed: no variance or correlation
for i in (0, 9, 18, 27,):
assert cov.matrix_copy_block(i, 0, 2, n) == 0
# u_star coefficients u13 and u23 for point group 3 sites are fixed
# to 0: again no variance or correlation with any other param
for i in (7, 16, 25, 34,):
assert cov.matrix_copy_block(i, 0, 2, n).as_1d()\
.all_approx_equal(0., 1e-20)
# u_star coefficients u11, u22 and u12 for point group 3 sites
# are totally correlated, with variances in ratios 1:1:1/2
for i in (3, 12, 21, 30,):
assert cov[i, i] != 0
assert approx_equal(cov[i, i], cov[i+1, i+1], eps=1e-15)
assert approx_equal(cov[i, i+1]/cov[i, i], 1, eps=1e-12)
assert approx_equal(cov[i, i+3]/cov[i, i], 0.5, eps=1e-12)
def run_implementation(server_info, inp, status):
if (inp.ucparams_2 == ""):
inp.ucparams_2 = inp.ucparams_1
if (inp.sgsymbol_2 == ""):
inp.sgsymbol_2 = inp.sgsymbol_1
inp.convention_2 = inp.convention_1
tolerance = float(inp.tolerance)
print "Tolerance:", tolerance
if (tolerance <= 0.):
raise ValueError, "Tolerance must be greater than zero."
print
diffraction_index_equivalent = int(inp.diffraction_index_equivalent)
if (diffraction_index_equivalent):
print "Models are diffraction index equivalent."
print
models1 = web_to_models(inp.ucparams_1, inp.sgsymbol_1, inp.convention_1,
inp.format_1, inp.coor_type_1, inp.skip_columns_1,
inp.coordinates[0])
model1 = models1.get_next()
assert model1, "Problems reading reference model."
model1.show("Reference model")
if (model_is_too_large(model=model1)):
return
assert not models1.get_next()
if (model1.unit_cell() is None):
raise RuntimeError("Unit cell parameters unknown (reference model).")
if (model1.space_group_info() is None):
raise RuntimeError("Space group unknown (reference model).")
models2 = web_to_models(inp.ucparams_2,
inp.sgsymbol_2,
inp.convention_2,
inp.format_2,
inp.coor_type_2,
inp.skip_columns_2,
inp.coordinates[1],
other_symmetry=model1)
while 1:
print "#" * 79
print
model2 = models2.get_next()
if (not model2): break
model2.show(model2.label)
assert model2.unit_cell() is not None
assert model2.space_group_info() is not None
if (model_is_too_large(model=model2)):
continue
sys.stdout.flush()
model_matches = emma.model_matches(
model1=model1,
model2=model2,
tolerance=tolerance,
models_are_diffraction_index_equivalent=diffraction_index_equivalent
)
if (model_matches.n_matches() == 0):
print "No matches."
print
else:
for match in model_matches.refined_matches:
print "." * 79
print
match.show()
def exercise(self):
xs0 = self.structure
xs = xs0.deep_copy_scatterers()
k1, s1, li1, o1, o2 = xs.scatterers()
self.shake_point_group_3(k1)
self.shake_point_group_3(s1)
self.shake_point_group_3(li1)
self.shake_point_group_3(o1)
o2.site = tuple(
[ x*(1 + random.uniform(-self.delta_site, self.delta_site))
for x in o2.site])
o2.u_star = tuple(
[ u*(1 + random.uniform(-self.delta_u_star, self.delta_u_star))
for u in o2.u_star])
for sc in xs.scatterers():
sc.flags.set_use_u_iso(False).set_use_u_aniso(True)
sc.flags.set_grad_site(True).set_grad_u_aniso(True)
connectivity_table = smtbx.utils.connectivity_table(xs)
reparametrisation = constraints.reparametrisation(
structure=xs,
constraints=[],
connectivity_table=connectivity_table)
ls = least_squares.crystallographic_ls(
self.fo_sq.as_xray_observations(), reparametrisation,
weighting_scheme=least_squares.unit_weighting(),
origin_fixing_restraints_type=
origin_fixing_restraints.atomic_number_weighting)
cycles = normal_eqns_solving.levenberg_marquardt_iterations(
ls,
gradient_threshold=1e-12,
step_threshold=1e-7,
track_all=True)
## Test whether refinement brought back the shaked structure to its
## original state
match = emma.model_matches(xs0.as_emma_model(),
xs.as_emma_model()).refined_matches[0]
assert match.rt.r == matrix.identity(3)
assert not match.singles1 and not match.singles2
assert match.rms < 1e-6
delta_u_carts= ( xs.scatterers().extract_u_cart(xs.unit_cell())
- xs0.scatterers().extract_u_cart(xs.unit_cell())).norms()
assert flex.abs(delta_u_carts) < 1e-6
assert approx_equal(ls.scale_factor(), 1, eps=1e-4)
## Test covariance matrix
jac_tr = reparametrisation.jacobian_transpose_matching_grad_fc()
cov = ls.covariance_matrix(
jacobian_transpose=jac_tr, normalised_by_goof=False)\
.matrix_packed_u_as_symmetric()
m, n = cov.accessor().focus()
# x,y for point group 3 sites are fixed: no variance or correlation
for i in (0, 9, 18, 27,):
assert cov.matrix_copy_block(i, 0, 2, n) == 0
# u_star coefficients u13 and u23 for point group 3 sites are fixed
# to 0: again no variance or correlation with any other param
for i in (7, 16, 25, 34,):
assert cov.matrix_copy_block(i, 0, 2, n).as_1d()\
.all_approx_equal(0., 1e-20)
# u_star coefficients u11, u22 and u12 for point group 3 sites
# are totally correlated, with variances in ratios 1:1:1/2
for i in (3, 12, 21, 30,):
assert cov[i, i] != 0
assert approx_equal(cov[i, i], cov[i+1, i+1], eps=1e-15)
assert approx_equal(cov[i, i+1]/cov[i, i], 1, eps=1e-12)
assert approx_equal(cov[i, i+3]/cov[i, i], 0.5, eps=1e-12)
def exercise_masks():
mt = flex.mersenne_twister(seed=0)
xs_ref = structure.from_shelx(
file=cStringIO.StringIO(YAKRUY_ins))
mi = xs_ref.crystal_symmetry().build_miller_set(
d_min=0.5, anomalous_flag=False)
fo = mi.structure_factors_from_scatterers(
xs_ref, algorithm="direct").f_calc().as_amplitude_array()
k = 0.05 + 10 * mt.random_double()
fo = fo.customized_copy(data=fo.data()*k)
fo2 = fo.f_as_f_sq()
acetonitrile_sel = xs_ref.label_selection(
'N4', 'C20', 'C21', 'H211', 'H212', 'H213')
xs_no_sol = xs_ref.deep_copy_scatterers().select(
acetonitrile_sel, negate=True)
# check what happens when no voids are found
mask = masks.mask(xs_ref, fo2)
mask.compute(solvent_radius=1.2,
shrink_truncation_radius=1.2,
resolution_factor=1/2,
atom_radii_table={'C':1.70, 'B':1.63, 'N':1.55, 'O':1.52})
assert mask.structure_factors() is None
assert mask.n_voids() == 0
assert mask.n_solvent_grid_points() == 0
assert mask.f_mask() is None
assert mask.f_model() is None
assert mask.modified_intensities() is None
assert mask.f_000 is None
s = cStringIO.StringIO()
mask.show_summary(log=s)
assert not show_diff(s.getvalue(), """\
use_set_completion: False
solvent_radius: 1.20
shrink_truncation_radius: 1.20
van der Waals radii:
B C H N O
1.63 1.70 1.20 1.55 1.52
Total solvent accessible volume / cell = 0.0 Ang^3 [0.0%]
gridding: (30,45,54)
""")
# and now with some voids
fo2_complete = fo2.sort()
fo2_missing_1 = fo2.select_indices(flex.miller_index([(0,0,1),
]), negate=True)
mt = flex.mersenne_twister(seed=0)
fo2_incomplete = fo2.select(mt.random_bool(fo2.size(), 0.95))
for fo2, use_space_group_symmetry in zip(
(fo2_complete, fo2_complete, fo2_missing_1, fo2_incomplete),
(True, False, True, True)):
if fo2 is fo2_complete: use_set_completion=False
else: use_set_completion=True
mask = masks.mask(xs_no_sol, fo2, use_set_completion=use_set_completion)
mask.compute(solvent_radius=1.2,
shrink_truncation_radius=1.2,
resolution_factor=1/3,
#atom_radii_table={'C':1.70, 'B':1.63, 'N':1.55, 'O':1.52},
use_space_group_symmetry=use_space_group_symmetry)
n_voids = flex.max(mask.mask.data) - 1
f_mask = mask.structure_factors()
f_model = mask.f_model()
modified_fo = mask.modified_intensities().as_amplitude_array()
f_obs_minus_f_model = fo.common_set(f_model).f_obs_minus_f_calc(f_obs_factor=1/k, f_calc=f_model)
diff_map = miller.fft_map(mask.crystal_gridding, f_obs_minus_f_model)
diff_map.apply_volume_scaling()
stats = diff_map.statistics()
assert n_voids == 2
assert approx_equal(n_voids, mask.n_voids())
assert mask.n_solvent_grid_points() == 42148
if fo2 is fo2_complete:
# check the difference map has no large peaks/holes
assert max(stats.max(), abs(stats.min())) < 0.11
# expected electron count: 44
assert approx_equal(mask.f_000_s, 44, eps=1)
assert modified_fo.r1_factor(mask.f_calc.common_set(modified_fo), k) < 0.006
assert fo.common_set(fo2).r1_factor(f_model.common_set(fo2), k) < 0.006
s = cStringIO.StringIO()
mask.show_summary(log=s)
assert not show_diff(s.getvalue(), """\
use_set_completion: True
solvent_radius: 1.20
shrink_truncation_radius: 1.20
van der Waals radii:
C H N O
1.77 1.20 1.50 1.45
Total solvent accessible volume / cell = 146.5 Ang^3 [16.3%]
Total electron count / cell = 43.2
gridding: (45,72,80)
Void #Grid points Vol/A^3 Vol/% Centre of mass (frac) Eigenvectors (frac)
1 21074 73.3 8.1 ( 0.267, 0.461, 0.672) 1 ( 0.982, 0.126, 0.142)
2 (-0.166, 0.206, 0.964)
3 (-0.092, 0.970,-0.223)
2 21074 73.3 8.1 (-0.267, 0.539, 0.328) 1 ( 0.982, 0.126, 0.142)
2 (-0.166, 0.206, 0.964)
3 (-0.092, 0.970,-0.223)
Void Vol/Ang^3 #Electrons
1 73.3 21.6
2 73.3 21.6
""")
cif_block = mask.as_cif_block()
fo2 = fo.f_as_f_sq()
# this bit is necessary until we have constraints, as
# otherwise the hydrogens just disappear into the ether.
xs = xs_no_sol.deep_copy_scatterers()
h_selection = xs.element_selection('H')
orig_flags = xs.scatterer_flags()
flags = orig_flags.deep_copy()
for flag, is_h in zip(flags, h_selection):
if is_h:
flag.set_grads(False)
xs.set_scatterer_flags(flags)
# first refine with no mask
xs = exercise_least_squares(xs, fo2, mask=None)
xs.set_scatterer_flags(orig_flags)
for i in range(1):
# compute improved mask/f_mask
mask = masks.mask(xs, fo2)
mask.compute(solvent_radius=1.2,
shrink_truncation_radius=1.2,
atom_radii_table={'C':1.70, 'B':1.63, 'N':1.55, 'O':1.52},
resolution_factor=1/3)
mask.structure_factors()
xs = exercise_least_squares(xs, fo2, mask)
# again exclude hydrogens from tests because of lack of constraints
emma_ref = xs_no_sol.select(h_selection, negate=True).as_emma_model()
match = emma.model_matches(emma_ref, xs.select(
h_selection, negate=True).as_emma_model()).refined_matches[0]
assert approx_equal(match.rms, 0, eps=1e-3)
def run():
import sys
reflection_file_name = sys.argv[1]
import iotbx.cif
miller_arrays = iotbx.cif.reader(
file_path=reflection_file_name).as_miller_arrays()
for miller_array in miller_arrays:
s = str(miller_array.info())
if '_meas' in s:
if miller_array.is_xray_intensity_array():
break
elif miller_array.is_xray_amplitude_array():
break
if not ('_meas' in str(miller_array.info())
and (miller_array.is_xray_amplitude_array()
or miller_array.is_xray_intensity_array())):
print "Sorry: CIF does not contain an appropriate miller array"
return
miller_array.show_comprehensive_summary()
print
if (miller_array.is_xray_intensity_array()):
print "Converting intensities to amplitudes."
miller_array = miller_array.as_amplitude_array()
print
miller_array.setup_binner(auto_binning=True)
miller_array.binner().show_summary()
print
all_e_values = miller_array.quasi_normalize_structure_factors().sort(
by_value="data")
large_e_values = all_e_values.select(all_e_values.data() > 1.2)
print "number of large_e_values:", large_e_values.size()
print
from cctbx import dmtbx
triplets = dmtbx.triplet_generator(large_e_values)
from cctbx.array_family import flex
print "triplets per reflection: min,max,mean: %d, %d, %.2f" % (
flex.min(triplets.n_relations()),
flex.max(triplets.n_relations()),
flex.mean(triplets.n_relations().as_double()))
print "total number of triplets:", flex.sum(triplets.n_relations())
print
input_phases = large_e_values \
.random_phases_compatible_with_phase_restrictions()
tangent_formula_phases = input_phases.data()
for i in xrange(10):
tangent_formula_phases = triplets.apply_tangent_formula(
amplitudes=large_e_values.data(),
phases_rad=tangent_formula_phases,
selection_fixed=None,
use_fixed_only=False,
reuse_results=True)
e_map_coeff = large_e_values.phase_transfer(
phase_source=tangent_formula_phases)
from cctbx import maptbx
e_map = e_map_coeff.fft_map(
symmetry_flags=maptbx.use_space_group_symmetry)
e_map.apply_sigma_scaling()
e_map.statistics().show_summary(prefix="e_map ")
print
peak_search = e_map.peak_search(parameters=maptbx.peak_search_parameters(
min_distance_sym_equiv=1.2))
peaks = peak_search.all(max_clusters=10)
print "e_map peak list"
print " fractional coordinates peak height"
for site,height in zip(peaks.sites(), peaks.heights()):
print " (%9.6f, %9.6f, %9.6f)" % site, "%10.3f" % height
print
if (len(sys.argv) > 2):
coordinate_file_name = sys.argv[2]
xray_structure = iotbx.cif.reader(
file_path=coordinate_file_name).build_crystal_structures(
data_block_name="I")
xray_structure.show_summary().show_scatterers()
print
f_calc = abs(miller_array.structure_factors_from_scatterers(
xray_structure=xray_structure,
algorithm="direct").f_calc())
correlation = flex.linear_correlation(f_calc.data(), miller_array.data())
assert correlation.is_well_defined()
print "correlation of f_obs and f_calc: %.4f" % correlation.coefficient()
print
reference_model = xray_structure.as_emma_model()
assert reference_model.unit_cell().is_similar_to(e_map.unit_cell())
assert reference_model.space_group() == e_map.space_group()
from cctbx import euclidean_model_matching as emma
peak_model = emma.model(special_position_settings=reference_model)
for i,site in enumerate(peaks.sites()):
peak_model.add_position(emma.position(label="peak%02d" % i, site=site))
matches = emma.model_matches(
model1=reference_model,
model2=peak_model,
tolerance=1.,
models_are_diffraction_index_equivalent=True)
for match in matches.refined_matches:
match.show()
def run():
import sys
reflection_file_name = sys.argv[1]
import iotbx.cif
miller_arrays = iotbx.cif.reader(
file_path=reflection_file_name).as_miller_arrays()
for miller_array in miller_arrays:
s = str(miller_array.info())
if '_meas' in s:
if miller_array.is_xray_intensity_array():
break
elif miller_array.is_xray_amplitude_array():
break
if not ('_meas' in str(miller_array.info()) and
(miller_array.is_xray_amplitude_array()
or miller_array.is_xray_intensity_array())):
print "Sorry: CIF does not contain an appropriate miller array"
return
miller_array.show_comprehensive_summary()
print
if (miller_array.is_xray_intensity_array()):
print "Converting intensities to amplitudes."
miller_array = miller_array.as_amplitude_array()
print
miller_array.setup_binner(auto_binning=True)
miller_array.binner().show_summary()
print
all_e_values = miller_array.quasi_normalize_structure_factors().sort(
by_value="data")
large_e_values = all_e_values.select(all_e_values.data() > 1.2)
print "number of large_e_values:", large_e_values.size()
print
from cctbx import dmtbx
triplets = dmtbx.triplet_generator(large_e_values)
from cctbx.array_family import flex
print "triplets per reflection: min,max,mean: %d, %d, %.2f" % (
flex.min(triplets.n_relations()), flex.max(triplets.n_relations()),
flex.mean(triplets.n_relations().as_double()))
print "total number of triplets:", flex.sum(triplets.n_relations())
print
input_phases = large_e_values \
.random_phases_compatible_with_phase_restrictions()
tangent_formula_phases = input_phases.data()
for i in xrange(10):
tangent_formula_phases = triplets.apply_tangent_formula(
amplitudes=large_e_values.data(),
phases_rad=tangent_formula_phases,
selection_fixed=None,
use_fixed_only=False,
reuse_results=True)
e_map_coeff = large_e_values.phase_transfer(
phase_source=tangent_formula_phases)
from cctbx import maptbx
e_map = e_map_coeff.fft_map(symmetry_flags=maptbx.use_space_group_symmetry)
e_map.apply_sigma_scaling()
e_map.statistics().show_summary(prefix="e_map ")
print
peak_search = e_map.peak_search(parameters=maptbx.peak_search_parameters(
min_distance_sym_equiv=1.2))
peaks = peak_search.all(max_clusters=10)
print "e_map peak list"
print " fractional coordinates peak height"
for site, height in zip(peaks.sites(), peaks.heights()):
print " (%9.6f, %9.6f, %9.6f)" % site, "%10.3f" % height
print
if (len(sys.argv) > 2):
coordinate_file_name = sys.argv[2]
xray_structure = iotbx.cif.reader(
file_path=coordinate_file_name).build_crystal_structures(
data_block_name="I")
xray_structure.show_summary().show_scatterers()
print
f_calc = abs(
miller_array.structure_factors_from_scatterers(
xray_structure=xray_structure, algorithm="direct").f_calc())
correlation = flex.linear_correlation(f_calc.data(),
miller_array.data())
assert correlation.is_well_defined()
print "correlation of f_obs and f_calc: %.4f" % correlation.coefficient(
)
print
reference_model = xray_structure.as_emma_model()
assert reference_model.unit_cell().is_similar_to(e_map.unit_cell())
assert reference_model.space_group() == e_map.space_group()
from cctbx import euclidean_model_matching as emma
peak_model = emma.model(special_position_settings=reference_model)
for i, site in enumerate(peaks.sites()):
peak_model.add_position(
emma.position(label="peak%02d" % i, site=site))
matches = emma.model_matches(
model1=reference_model,
model2=peak_model,
tolerance=1.,
models_are_diffraction_index_equivalent=True)
for match in matches.refined_matches:
match.show()
if len(emma_models)==2 and os.path.isfile(file_name):
try:
second_model_as_pdb_inp=iotbx.pdb.input(
file_name=file_name)
except Exception,e:
pass
emma_models[0].show("Reference model")
emma_models[1].show("Other model")
for model,label in zip(emma_models, ["reference", "other"]):
if (model.unit_cell() is None):
raise RuntimeError("Unit cell parameters unknown (%s model)." % label)
if (model.space_group_info() is None):
raise RuntimeError("Space group unknown (%s model)." % label)
model_matches = emma.model_matches(
model1=emma_models[0],
model2=emma_models[1],
tolerance=tolerance,
models_are_diffraction_index_equivalent=diffraction_index_equivalent)
if (model_matches.n_matches() == 0):
print "No matches."
print
else:
max_n_pairs = None
first=True
for match in model_matches.refined_matches:
if (max_n_pairs is None or len(match.pairs) > max_n_pairs*0.2):
print "." * 79
print
match.show()
if first and output_pdb: # 2013-01-25 tt
if second_model_as_pdb_inp:
def run_test(space_group_info,
n_elements=5,
d_min=1.5,
grid_resolution_factor=1. / 3,
max_prime=5,
verbose=0):
structure = random_structure.xray_structure(space_group_info,
elements=["Si"] * n_elements,
volume_per_atom=200,
min_distance=3.,
general_positions_only=False)
miller_set_f_obs = miller.build_set(crystal_symmetry=structure,
anomalous_flag=(random.random() > 0.5),
d_min=d_min)
f_obs = miller_set_f_obs.structure_factors_from_scatterers(
xray_structure=structure, algorithm="direct").f_calc()
structure_factor_utils.check_phase_restrictions(f_obs, verbose=verbose)
if (0 or verbose):
f_obs.show_summary()
if (0 or verbose):
f_obs.show_array()
fft_map = f_obs.fft_map(resolution_factor=grid_resolution_factor,
symmetry_flags=maptbx.use_space_group_symmetry)
p = pickle.dumps(fft_map)
l = pickle.loads(p)
s1 = StringIO()
fft_map.statistics().show_summary(f=s1)
s2 = StringIO()
l.statistics().show_summary(f=s2)
assert not show_diff(s2.getvalue(), s1.getvalue())
#
if (not f_obs.anomalous_flag()):
maptbx_fft_map = maptbx.fft_to_real_map_unpadded(
space_group=fft_map.space_group(),
n_real=fft_map.n_real(),
miller_indices=f_obs.indices(),
data=f_obs.data())
fft_map_unpadded = fft_map.real_map_unpadded(in_place=False)
assert approx_equal(
flex.linear_correlation(fft_map_unpadded.as_1d(),
maptbx_fft_map.as_1d()).coefficient(), 1)
assert approx_equal(
flex.max(flex.abs(maptbx_fft_map - fft_map_unpadded)), 0)
#
fft_map.apply_sigma_scaling()
real_map = maptbx.copy(fft_map.real_map(),
flex.grid(fft_map.real_map().focus()))
grid_tags = maptbx.grid_tags(real_map.focus())
grid_tags.build(fft_map.space_group_info().type(),
fft_map.symmetry_flags())
assert grid_tags.n_grid_misses() == 0
assert grid_tags.verify(real_map)
rms = []
for interpolate in (False, True):
peak_list = maptbx.peak_list(data=real_map,
tags=grid_tags.tag_array(),
peak_search_level=1,
max_peaks=2 * n_elements,
interpolate=interpolate)
assert peak_list.gridding() == real_map.focus()
check_peaks(structure, peak_list.sites(),
d_min * grid_resolution_factor)
crystal_gridding_tags = fft_map.tags()
cluster_analysis = maptbx.peak_cluster_analysis(
peak_list=peak_list,
special_position_settings=structure,
general_positions_only=False,
effective_resolution=d_min,
min_cross_distance=2,
max_clusters=n_elements).all()
check_peaks(
structure, cluster_analysis.sites(),
cluster_analysis.min_cross_distance() +
d_min * grid_resolution_factor)
structure_from_peaks = xray.structure(structure)
for site in cluster_analysis.sites():
structure_from_peaks.add_scatterer(
xray.scatterer(label="site", scattering_type="", site=site))
emma_matches = emma.model_matches(structure.as_emma_model(),
structure_from_peaks.as_emma_model(),
tolerance=d_min * 2)
rms.append(emma_matches.refined_matches[0].rms)
assert len(emma_matches.refined_matches[0].pairs) == n_elements
# exercise interpolation vs. summation
map_coeffs = f_obs.expand_to_p1()
fft_map = f_obs.fft_map(resolution_factor=grid_resolution_factor,
symmetry_flags=maptbx.use_space_group_symmetry)
fft_map.apply_volume_scaling()
real_map = fft_map.real_map_unpadded()
sum1 = sum2 = 0
for scatterer in structure.scatterers():
v1 = real_map.eight_point_interpolation(scatterer.site)
v2 = real_map.tricubic_interpolation(scatterer.site)
v3 = map_coeffs.direct_summation_at_point(scatterer.site)
sum1 += abs(v1 - v3.real)
sum2 += abs(v2 - v3.real)
mean_delta_linear = sum1 / n_elements
mean_delta_cubic = sum2 / n_elements
assert (mean_delta_cubic < mean_delta_linear)
if (0 or verbose):
print("emma rms grid, interpolated: %.2f %.2f" % tuple(rms))
assert rms[0] >= rms[1]
map_1 = fft_map.real_map_unpadded(in_place=False)
map_2 = fft_map.real_map_unpadded(in_place=True)
assert (map_1.all_eq(map_2))
def run(args, command_name="emma_shelxd_lst.py"):
command_line = (option_parser(
usage=command_name + " [options]"
+" reference_coordinates shelxd-lst-file",
description="Example: %s model1.pdb sad_fa.lst" % command_name)
.enable_symmetry_comprehensive()
.option(None, "--tolerance",
action="store",
type="float",
default=.5,
help="match tolerance",
metavar="FLOAT")
.option(None, "--diffraction_index_equivalent",
action="store_true",
help="Use only if models are diffraction-index equivalent.")
).process(args=args, nargs=2)
crystal_symmetry = command_line.symmetry
if ( crystal_symmetry.unit_cell() is None
or crystal_symmetry.space_group_info() is None):
for file_name in command_line.args:
crystal_symmetry = crystal_symmetry.join_symmetry(
other_symmetry=crystal_symmetry_from_any.extract_from(
file_name=file_name),
force=False)
tolerance = command_line.options.tolerance
print "Tolerance:", tolerance
if (tolerance <= 0.):
raise ValueError, "Tolerance must be greater than zero."
print
diffraction_index_equivalent = \
command_line.options.diffraction_index_equivalent
if (diffraction_index_equivalent):
print "Models are diffraction index equivalent."
print
emma_ref = get_emma_model(file_name=command_line.args[0],
crystal_symmetry=crystal_symmetry)
emma_ref.show("Reference model")
emma_others = get_emma_models_from_lst(command_line.args[1], crystal_symmetry)
print "try CCall CCweak nmatch rms order.min order.max"
for emma_other, itry, ccall, ccweak in emma_others:
model_matches = emma.model_matches(model1=emma_ref,
model2=emma_other,
tolerance=tolerance,
models_are_diffraction_index_equivalent=diffraction_index_equivalent)
print itry, ccall, ccweak,
if (model_matches.n_matches() == 0):
print "0 nan nan nan"
else:
max_n_pairs = None
first=True
for match in model_matches.refined_matches:
if (max_n_pairs is None or len(match.pairs) > max_n_pairs*0.2):
orders = map(lambda x: int(x[1]), match.pairs)
print "%3d %.5f %3d %3d" % (len(match.pairs), match.rms, min(orders), max(orders))
#match.show()
#first=False
break
if (max_n_pairs is None):
max_n_pairs = len(match.pairs)
def run_call_back(flags, space_group_info):
verbose = flags.Verbose
if (flags.StaticModels):
model1 = (test_model().add_random_positions(2, "A").shuffle_positions(
).random_symmetry_mates().apply_random_eucl_op())
model2 = (test_model().add_random_positions(
3, "B").shuffle_positions().random_symmetry_mates().
apply_random_eucl_op().shake_positions().random_hand())
for i in (0, 1):
m1 = model1
if (i): m1 = model1.transform_to_reference_setting().reset_cb_op()
for j in (0, 1):
m2 = model2
if (j):
m2 = model2.transform_to_reference_setting().reset_cb_op()
if (0 or verbose):
m1.show("Model1(%d)" % (i, ))
m2.show("Model2(%d)" % (j, ))
model_matches = emma.model_matches(m1,
m2,
rms_penalty_per_site=0)
analyze_refined_matches(m1, m2, model_matches.refined_matches,
verbose)
return False
model_core = test_model(space_group_info)
model1 = (model_core.add_random_positions(2, "A"))
model2 = (model_core.add_random_positions(
3, "B").shuffle_positions().random_symmetry_mates().
apply_random_eucl_op().shake_positions().random_hand())
if (0 or verbose):
model_core.show("Core")
model1.show("Model1")
model2.show("Model2")
model_matches = emma.model_matches(model1, model2, rms_penalty_per_site=0)
analyze_refined_matches(model1, model2, model_matches.refined_matches,
verbose)
assert model_matches.consensus_model().size() >= model1.size() - 2
assert model_matches.consensus_model(i_model=2).size() >= model2.size() - 3
model1.expand_to_p1()
model2.as_xray_structure()
for i1, i2, m1, m2 in [(1, 2, model1, model2), (2, 1, model2, model1)]:
m2_t = model_matches.transform_model(i_model=i2)
assert m1.unit_cell().is_similar_to(m2_t.unit_cell())
assert m1.space_group() == m2_t.space_group()
for pair in model_matches.refined_matches[0].pairs:
site1 = m1.positions()[pair[i1 - 1]].site
site2 = m2_t.positions()[pair[i2 - 1]].site
equiv_sites1 = sgtbx.sym_equiv_sites(m1.site_symmetry(site1))
dist_info = sgtbx.min_sym_equiv_distance_info(equiv_sites1, site2)
assert dist_info.dist() < model_matches.tolerance + 1.e-6
site2_closest = dist_info.sym_op() * site2
assert approx_equal(m1.unit_cell().distance(site1, site2_closest),
dist_info.dist())
if (i1 == 1):
singles = model_matches.refined_matches[0].singles2
else:
singles = model_matches.refined_matches[0].singles1
for i_site2 in singles:
site2 = m2_t.positions()[i_site2].site
for i_site1 in range(len(model1.positions())):
site1 = m1.positions()[i_site1].site
equiv_sites1 = sgtbx.sym_equiv_sites(m1.site_symmetry(site1))
dist_info = sgtbx.min_sym_equiv_distance_info(
equiv_sites1, site2)
if (dist_info.dist() < model_matches.tolerance - 1.e-6):
ok = False
for pair in model_matches.refined_matches[0].pairs:
if (pair[i1 - 1] == i_site1):
ok = True
assert ok