def test_constructor_from_command_list_Trajectory(self):
'''mutable Trajectory'''
# use `load` method rather `iterload`
traj = pt.load("data/tz2.ortho.nc", "data/tz2.ortho.parm7")
# make sure no space-sensitivity
# make the code (commands) ugly is my intention.
commands = [
'autoimage ',
'autoimage',
'rmsd @CA',
'distance :3 :7',
'distance :3 :7',
'vector :2 :3',
' distance :3 :7',
'rms @C,N,O',
]
dslist = CpptrajDatasetList()
actlist = ActionList(commands, traj.top, dslist=dslist)
for frame in traj:
actlist.compute(frame)
aa_eq(pt.rmsd(traj, mask='@CA'), dslist[0])
aa_eq(pt.distance(traj, ':3 :7'), dslist[1])
aa_eq(pt.distance(traj, ':3 :7'), dslist[2])
# do not need to perform rmsfit again.
aa_eq(pt.vector.vector_mask(traj, ':2 :3'), dslist[3].values)
aa_eq(pt.distance(traj, ':3 :7'), dslist[4])
aa_eq(pt.rmsd(traj, mask='@C,N,O'), dslist[5])
def assert_equal_topology(top, new_top, traj):
import pytraj as pt
assert new_top.n_atoms == top.n_atoms, 'same n_atoms'
assert new_top.n_residues == top.n_residues, 'same n_residues'
assert new_top.n_mols == top.n_mols, 'same n_mols'
# there are inverted bond indices [5292 5291] vs [5291 5292]
# so use distance to assert
aa_eq(
pt.distance(traj, new_top.bond_indices),
pt.distance(traj, top.bond_indices))
# same for dihedral_indices
aa_eq(
pt.dihedral(traj, new_top.dihedral_indices),
pt.dihedral(traj, top.dihedral_indices))
aa_eq(new_top.dihedral_indices, top.dihedral_indices)
aa_eq(new_top.mass, top.mass)
aa_eq(new_top.charge, top.charge)
aa_eq(new_top.box.values, top.box.values)
assert [res.name for res in top.residues
] == [res.name for res in new_top.residues], 'equal resnames'
assert [atom.name for atom in top.atoms
] == [atom.name for atom in new_top.atoms], 'equal resnames'
for res, res_new in zip(top.residues, new_top.residues):
assert res.first_atom_index == res_new.first_atom_index, 'first atom'
assert res.last_atom_index == res_new.last_atom_index, 'last atom'
def assert_equal_topology(top, new_top, traj):
import pytraj as pt
assert new_top.n_atoms == top.n_atoms, 'same n_atoms'
assert new_top.n_residues == top.n_residues, 'same n_residues'
assert new_top.n_mols == top.n_mols, 'same n_mols'
# there are inverted bond indices [5292 5291] vs [5291 5292]
# so use distance to assert
aa_eq(pt.distance(traj, new_top.bond_indices),
pt.distance(traj, top.bond_indices))
# same for dihedral_indices
aa_eq(pt.dihedral(traj, new_top.dihedral_indices),
pt.dihedral(traj, top.dihedral_indices))
aa_eq(new_top.dihedral_indices, top.dihedral_indices)
aa_eq(new_top.mass, top.mass)
aa_eq(new_top.charge, top.charge)
aa_eq(new_top.box.values, top.box.values)
assert [res.name for res in top.residues
] == [res.name for res in new_top.residues], 'equal resnames'
assert [atom.name for atom in top.atoms
] == [atom.name for atom in new_top.atoms], 'equal resnames'
for res, res_new in zip(top.residues, new_top.residues):
assert res.first_atom_index == res_new.first_atom_index, 'first atom'
assert res.last_atom_index == res_new.last_atom_index, 'last atom'
def test_general(self):
traj = pt.iterload("./data/Tc5b.x", "./data/Tc5b.top")
fa = traj[:]
mask = ':1@CA :14@CB'
d0 = pt.calc_distance(traj, mask)
d1 = pt.distance(traj, mask)
d2 = pt.calc_distance(fa, mask)
aa_eq(d0, d1)
aa_eq(d0, d2)
Nsize = 12
arr = np.random.randint(0, 300, size=Nsize * 2).reshape(Nsize, 2)
d3 = pt.calc_distance(fa, arr)
d4 = pt.distance(traj, arr)
d5 = pt.calc_distance(traj, arr)
d6 = pt.calc_distance(fa, arr)
d7 = pt.calc_distance([fa, traj], arr, n_frames=2 * fa.n_frames)
d8 = pt.calc_distance([fa, traj],
arr,
n_frames=2 * fa.n_frames,
dtype='dataset')
aa_eq(d3, d4)
aa_eq(d3, d5)
aa_eq(d3, d6)
aa_eq(d3.T, d7.T[:fa.n_frames])
aa_eq(d3.T, d7.T[fa.n_frames:])
aa_eq(d7, d8.values)
# raise
self.assertRaises(ValueError, lambda: pt.dihedrals(traj, [[0, 3, 2]]))
def test_constructor_from_command_list_Trajectory(self):
'''mutable Trajectory'''
# use `load` method rather `iterload`
traj = pt.load(fn("tz2.ortho.nc"), fn("tz2.ortho.parm7"))
# make sure no space-sensitivity
# make the code (commands) ugly is my intention.
commands = [
'autoimage ',
'autoimage',
'rmsd @CA',
'distance :3 :7',
'distance :3 :7',
'vector :2 :3',
' distance :3 :7',
'rms @C,N,O',
]
dslist = CpptrajDatasetList()
actlist = ActionList(commands, traj.top, dslist=dslist)
for frame in traj:
actlist.compute(frame)
aa_eq(pt.rmsd(traj, mask='@CA'), dslist[0])
aa_eq(pt.distance(traj, ':3 :7'), dslist[1])
aa_eq(pt.distance(traj, ':3 :7'), dslist[2])
# do not need to perform rmsfit again.
aa_eq(pt.vector.vector_mask(traj, ':2 :3'), dslist[3].values)
aa_eq(pt.distance(traj, ':3 :7'), dslist[4])
aa_eq(pt.rmsd(traj, mask='@C,N,O'), dslist[5])
def test_mpi_cpptraj_style():
comm = MPI.COMM_WORLD
# end. you are free to update anything below here
# split remd.x.000 to N cores and do calc_surf in parallel
root_dir = "data/"
traj_name = root_dir + "tz2.ortho.nc"
parm_name = root_dir + "tz2.ortho.parm7"
# load to TrajectoryIterator
traj = pt.iterload(traj_name, parm_name)
# save `total_arr` to rank=0
# others: total_arr = None
total_arr = pt.pmap_mpi(
['autoimage', 'center :2', 'distance :3 :7', 'angle :3 :7 :8'], traj)
if comm.rank != 0:
assert total_arr is None
if comm.rank == 0:
# assert to serial
from pytraj.utils.tools import dict_to_ndarray
arr = dict_to_ndarray(total_arr)
t0 = pt.center(traj[:].autoimage(), ':2')
aa_eq(pt.distance(t0, ':3 :7'), arr[0])
aa_eq(pt.angle(t0, ':3 :7 :8'), arr[1])
def test_multiple_cores(self):
from multiprocessing import Pool
traj = pt.iterload('data/tz2.nc', 'data/tz2.parm7')
for _ in range(10):
traj._load(traj.filelist)
saved_angle = pt.angle(traj, ':3 :10 :11')
saved_dist = pt.distance(traj, ':3 :10')
for n_cores in [2, 3]:
lines = ['angle :3 :10 :11', 'distance :3 :10']
pfuncs = partial(worker_state,
n_cores=n_cores,
traj=traj,
dtype='dict',
lines=lines)
p = Pool(n_cores)
data_list = p.map(pfuncs, [rank for rank in range(n_cores)])
p.close()
p.join()
data_list_sorted_rank = (data[1]
for data in sorted(data_list,
key=lambda x: x[0]))
final_data = concat_dict(data_list_sorted_rank)
aa_eq(final_data['Ang_00002'], saved_angle)
aa_eq(final_data['Dis_00003'], saved_dist)
def calc_autocorr(self):
'''Autocorrelation between the center of mass
of the two halves of the protein.'''
half = int(self.atoms / 2)
R = pd.Series(pt.distance(self.traj, ':1-{} :{}-{}'.format(half, half, self.atoms)))
# [R.autocorr(lag=i) for i in range(self.frames-5)]
self.autocorr = pt.acorr(R)
def calc_cov(self):
'''Calculates covariance and correlation from fluctuations, and distance matrix.'''
# Compute covariance coefficient matrix
# diagonal
for i in range(self.atoms):
for frm in self.fluct:
self.cov[i][i] += np.sum([frm[i][q] * frm[i][q] for q in range(3)])
self.cov[i][i] /= self.frames
# outside diagonal, taking advantage of symmetry
for i in range(self.atoms):
for j in range(i+1, self.atoms):
for frm in self.fluct:
self.cov[i][j] += np.sum([frm[i][q] * frm[j][q] for q in range(3)])
self.cov[i][j] /= self.frames
self.cov[j][i] = self.cov[i][j]
# correlation and distance
self.corr[i][j] = self.cov[i][j] / np.sqrt(self.cov[i][i] * self.cov[j][j])
self.corr[j][i] = self.corr[i][j]
self.dist[i][j] = pt.distance(
self.traj, ':{} :{}'.format(i+1, j+1), frame_indices=[0])[0]
self.dist[j][i] = self.dist[i][j]
print(u'\u2713 calculated covariance and correlation')
def calc_avg_dist(self):
avg_d = []
for i in range(self.atoms - 2):
mask = ":{} :{}".format(i+1, i+2)
dd = np.mean(pt.distance(self.traj, mask))
avg_d.append(dd)
self.avg_dist = np.mean(avg_d)
def test_iterload_and_load_remd():
# iterload_remd
traj = pt.iterload_remd(fn("Test_RemdTraj/rem.nc.000"),
fn("Test_RemdTraj/ala2.99sb.mbondi2.parm7"),
T=300.0)
for frame in traj:
assert frame.temperature == 300.0, 'frame temperature must be 300.0 K'
dist = pt.distance(traj, '@10 @20')
trajin_text = '''
parm {}
trajin {} remdtraj remdtrajtemp 300.
distance @10 @20
'''.format(fn('Test_RemdTraj/ala2.99sb.mbondi2.parm7'),
fn('Test_RemdTraj/rem.nc.000 '))
state = pt.load_cpptraj_state(trajin_text)
state.run()
aa_eq(dist, state.data[-1].values)
# load_remd
traj2 = pt.load_remd(fn("Test_RemdTraj/rem.nc.000"),
fn("Test_RemdTraj/ala2.99sb.mbondi2.parm7"),
T=300.0)
aa_eq(traj.xyz, traj2.xyz)
# with Topology
traj2 = pt.iterload_remd(fn("Test_RemdTraj/rem.nc.000"),
top=traj.top,
T=300.0)
aa_eq(traj.xyz, traj2.xyz)
def test_different_cores(self):
# use different frame_slice with different n_cores to test
REF_0 = pt.iterload(fn('tz2.nc'), fn('tz2.parm7'))[0]
for frame_slice in [
(0, 100),
(10, 100, 3),
(50, 80, 2),
(51, 80, 3),
]:
traj = pt.iterload(
fn('tz2.nc'), fn('tz2.parm7'), frame_slice=frame_slice)
saved_angle = pt.angle(traj, ':3 :7 :9')
saved_dist = pt.distance(traj, ':2 :10')
saved_rmsd = pt.rmsd(traj, ref=REF_0, mask='@CA')
lines = ['angle :3 :7 :9', 'distance :2 :10']
for n_cores in [1, 2]:
data_list = [
worker_by_state(rank, n_cores, traj, lines)
for rank in range(n_cores)
]
final_data = concat_dict([x[1] for x in data_list])
aa_eq(final_data['Ang_00002'], saved_angle)
aa_eq(final_data['Dis_00003'], saved_dist)
def getDistances(top, traj, list1, list2):
#the two lists contain tuples (residue number, atom type)
#read trajectory
traj = pt.load(traj, top)
#read distances
dist = dict()
first_in_seq = list(traj.top.residues)[0].index
for (r1, a1), (r2, a2) in zip(list1, list2):
dist[str(r1)+a1+':'+str(r2)+a2] = \
pt.distance(traj, \
':'+str(r1-first_in_seq)+searchAT[a1]+' :'+str(r2-first_in_seq)+searchAT[a2])
dump(dist, open(get_today() + '-rij.pkl', 'wb'))
#make statistics on distances
reff = dict()
for k in sorted(list(dist.keys())):
temp = np.array(dist[k])**(-6)
reff[k] = np.mean(temp)**(-1. / 6)
dump(reff, open(get_today() + '-reff.pkl', 'wb'))
#make plots
with PdfPages(get_today() + '-rij.pdf') as pdf:
for k in sorted(list(dist.keys())):
plt.figure()
plt.hist(dist[k])
plt.axvline(x=reff[k])
plt.title(k)
pdf.savefig()
plt.close()
return [dist, reff]
def main():
args = get_argument()
#check_input_data(args)
print(f'Current working directory: {os.getcwd()}')
#if not check_config_file(args.config, args.verbose):
# sys.exit(1)
#configfile = configparser.ConfigParser()
#configfile.read(f'{args.config}')
#hdlr = logging.FileHandler(
# f'framework_{strftime("%Y-%m-%d__%H-%M-%S", localtime())}.log')
#logging.root.addHandler(hdlr)
#logging.root.setLevel(logging.INFO)
#logging.root.setLevel(logging.DEBUG)
#logging.info(f'***Output from framework*** {strftime("%Y-%m-%d__%H-%M-%S", localtime())} \n')
#logging.info(f'#Protein : {args.protein} -> protein.pdb \n')
#logging.info(f'#Ligand : {args.ligand} {configfile["LIGAND"]["name"]} \n')
#logging.info(f'#Tunnel: {args.tunnel} \n')
pdb = pt.load("protein_with_tunnel.pdb")
pdb_topology = pt.load_topology('protein_with_tunnel.pdb')
restraint_residue = []
for i in range(1, pdb_topology.n_residues):
#print(f'\':{i} FIL T\'')
string_index = f':{i} :FIL T'
if pt.distance(pdb, string_index) < 12.0:
# simp_top = pdb_topology.simplify()
#name = simp_top.residue()
restraint_residue.append(f'{pdb_topology.residue(i).index},')
#string_residues.join(f':{pdb_topology.residue(i).index}')
#restraint_residue.append(name)
string_residues = ' '.join([str(elem) for elem in restraint_residue])
print(string_residues)
def test_hbonds_from_pdb(self):
traj = pt.load(fn('1L2Y.pdb'))
hb = pt.search_hbonds(traj)
state = pt.load_cpptraj_state('''
parm {pdb}
trajin {pdb}
hbond series
'''.format(pdb=fn('1L2Y.pdb')))
state.run()
for data_p, data_cpp in zip(hb.data, state.data[1:]):
assert len(
data_p) == traj.n_frames == 38, 'size of dataset must be 38'
aa_eq(data_p, data_cpp.values)
# make sure distances are smaller than cutoff
distance_cutoff = 2.5
angle_cutoff = 135.
hb = pt.search_hbonds(traj)
distances = pt.distance(traj, hb.get_amber_mask()[0])
angles = pt.angles(traj, hb.get_amber_mask()[1])
dist_indices = np.where(distances > distance_cutoff)
angle_indices = np.where(angles < angle_cutoff)
saved_donor_acceptors = [
'ASP9_OD2-ARG16_NH1-HH12', 'ASP9_OD2-ARG16_NH2-HH22',
'ASP9_OD2-ARG16_NE-HE', 'ASP9_OD2-ARG16_NH2-HH21',
'ASP9_OD2-ARG16_NH1-HH11'
]
donor_acceptors = pt.search_hbonds(traj, ':9,16').donor_acceptor
assert saved_donor_acceptors == donor_acceptors, 'saved_donor_acceptors'
aa_eq(hb.total_solute_hbonds(), hb.data['total_solute_hbonds'])
def getDistances(self):
#read distances
self.dist = dict()
first_in_seq = list(self.traj.top.residues)[0].index
for (r1, a1), (r2, a2) in zip(self.list1, self.list2):
self.dist[str(r1)+a1+':'+str(r2)+a2] = \
pt.distance(self.traj, \
':'+str(r1-first_in_seq)+searchAT[a1]+' :'+str(r2-first_in_seq)+searchAT[a2])
#print(str(r1)+a1+':'+str(r2)+a2, self.dist[str(r1)+a1+':'+str(r2)+a2])
dump(self.dist, open(get_today() + '-rij.pkl', 'wb'))
#make statistics on distances
self.reff = dict()
for k in sorted(list(self.dist.keys())):
temp = np.array(self.dist[k])**(-6)
self.reff[k] = np.mean(temp)**(-1. / 6)
dump(self.reff, open(get_today() + '-reff.pkl', 'wb'))
#make plots
with PdfPages(get_today() + '-rij.pdf') as pdf:
for k in sorted(list(self.dist.keys())):
plt.figure()
plt.hist(self.dist[k])
plt.axvline(x=self.reff[k])
plt.title(k)
pdf.savefig()
plt.close()
def test_distance_with_dry_traj_and_PBC_topology(self):
'''Issue: trajectory has no box but its topology does has box.
'''
traj = pt.iterload(
fn('dry_traj_with_PBC_top/strip.nc'),
fn('dry_traj_with_PBC_top/strip.prmtop'))
assert traj.top.has_box(), 'Topology must have box for testing'
correct_distance_with_image_True = pt.distance(
traj, ':8@OP2 :5@N1', image=True) # image=True will be ignored with message
correct_distance_with_image_False = pt.distance(
traj, ':8@OP2 :5@N1', image=False)
expected_distance = [3.08030475, 2.68452183]
aa_eq(correct_distance_with_image_True, expected_distance)
aa_eq(correct_distance_with_image_False, expected_distance)
def calc_autocorr(self):
'''Autocorrelation.'''
half = int(self.atoms / 2)
R = pd.Series(pt.distance(
self.traj, ':1-{} :{}-{}'.format(half, half, self.atoms)))
# [R.autocorr(lag=i) for i in range(self.frames-5)]
self.autocorr = pt.acorr(R)
def test_atom_distance(self):
traj = pt.iterload(tz2_trajin, tz2_top)
top = traj.top
ref = traj[0]
# test for 1st frame
top.set_reference(ref)
ref.top = top
# all atoms within 5 Angtrom from :3@CA
indices = top.select(":3@CA <@5.0")
saved_indices = np.loadtxt(
fn("mask.tz2.dat"), skiprows=1, usecols=(1, ))
neighbors_smaller = pt.search_neighbors(
traj, mask=':3@CA <@5.0', frame_indices=[
0,
])
# subtract by '1' since cpptraj uses "1" as starting index for output
saved_indices = saved_indices - 1
aa_eq(indices, saved_indices)
aa_eq(neighbors_smaller.values, indices)
# re-calculate the distance
ca_indices = pt.select_atoms(':3@CA', traj.top)
all_pairs = list(product(ca_indices, indices))
distances = pt.tools.flatten(pt.distance(ref, all_pairs))
for dist in distances:
assert dist < 5.0, 'all distances must be smaller than 5.0 Angstrom'
# test larger
# why do we need to set reference frame again?
top.set_reference(ref)
indices_larger = top.select(":3@CA >@5.0")
all_pairs_larger = list(product(ca_indices, indices_larger))
distances = pt.tools.flatten(pt.distance(ref, all_pairs_larger))
for dist in distances:
assert dist > 5.0, 'all distances must be larger than 5.0 Angstrom'
# search_neighbors
neighbors_larger = pt.search_neighbors(
traj, mask=':3@CA >@5.0', frame_indices=[
0,
])
aa_eq(neighbors_larger.values, indices_larger)
def test_atom_distance(self):
traj = pt.iterload("./data/tz2.nc", "./data/tz2.parm7")
top = traj.top
ref = traj[0]
# test for 1st frame
top.set_distance_mask_reference(ref)
ref.top = top
# all atoms within 5 Angtrom from :3@CA
indices = top.select(":3@CA <@5.0")
saved_indices = np.loadtxt("./data/mask.tz2.dat",
skiprows=1,
usecols=(1, ))
neighbors_smaller = pt.search_neighbors(traj,
mask=':3@CA <@5.0',
frame_indices=[0, ])
# subtract by '1' since cpptraj uses "1" as starting index for output
saved_indices = saved_indices - 1
aa_eq(indices, saved_indices)
aa_eq(neighbors_smaller.values, indices)
# re-calculate the distance
ca_indices = pt.select_atoms(':3@CA', traj.top)
all_pairs = list(product(ca_indices, indices))
distances = pt.tools.flatten(pt.distance(ref, all_pairs))
for dist in distances:
assert dist < 5.0, 'all distances must be smaller than 5.0 Angstrom'
# test larger
# why do we need to set reference frame again?
top.set_distance_mask_reference(ref)
indices_larger = top.select(":3@CA >@5.0")
all_pairs_larger = list(product(ca_indices, indices_larger))
distances = pt.tools.flatten(pt.distance(ref, all_pairs_larger))
for dist in distances:
assert dist > 5.0, 'all distances must be larger than 5.0 Angstrom'
# search_neighbors
neighbors_larger = pt.search_neighbors(traj,
mask=':3@CA >@5.0',
frame_indices=[0, ])
aa_eq(neighbors_larger.values, indices_larger)
def calc_TA_MSD(self):
'''Time averaged mean squared deviation.'''
half = int(self.atoms / 2)
dist = pt.distance(self.traj, ':1-{} :{}-{}'.format(half, half, self.atoms))
aux = []
for lag in range(len(dist) - 5):
dif = np.mean([(dist[i + lag] - dist[i]) ** 2 for i in range(len(dist)-lag)])
aux.append(dif)
self.TA_MSD = aux
def test_constructor_from_command_list_TrajectoryIterator_no_DatasetList(
self):
traj = pt.iterload(tc5b_trajin, tc5b_top)
commands = [
'rmsd @CA', 'distance :3 :7', 'distance :3 :7', 'vector :2 :3'
]
actlist = ActionList(commands, top=traj.top)
for frame in traj:
actlist.compute(frame)
aa_eq(pt.rmsd(traj, mask='@CA'), actlist.data[0])
aa_eq(pt.distance(traj, ':3 :7'), actlist.data[1])
aa_eq(pt.distance(traj, ':3 :7'), actlist.data[2])
aa_eq(pt.vector.vector_mask(traj(rmsfit=(0, '@CA')), ':2 :3'),
actlist.data[3].values)
def calc_corr(self):
'''Calculates correlation and distance matrices.'''
# Compute correlation coefficient matrix
# Calculate mutual distances between residues
for i in range(self.atoms):
for j in range(self.atoms):
self.corr[i][j] = self.cov[i][j] / np.sqrt(self.cov[i][i] * self.cov[j][j])
self.dist[i][j] = pt.distance(
self.traj, ':{} :{}'.format(i+1, j+1), frame_indices=[0])[0]
print(u'\u2713 calculated correlations')
def test_distance_with_dry_traj_and_PBC_topology(self):
'''Situation: there is dry traj (no box) but Topology has box info
'''
traj = pt.iterload(
fn('dry_traj_with_PBC_top/strip.nc'),
fn('dry_traj_with_PBC_top/strip.prmtop'))
assert traj.top.has_box(), 'Topology must have box for testing'
correct_distance_with_image_True = pt.distance(
traj, ':8@OP2 :5@N1', image=True)
correct_distance_with_image_False = pt.distance(
traj, ':8@OP2 :5@N1', image=False)
state = pt.load_batch(traj, '''
distance :8@OP2 :5@N1
''')
state.run()
expected_distance = [3.08030475, 2.68452183]
aa_eq(correct_distance_with_image_False, expected_distance)
aa_eq(correct_distance_with_image_True, [0., 0.])
def test_constructor_from_command_list_TrajectoryIterator_no_DatasetList(
self):
traj = pt.iterload("./data/Tc5b.x", "./data/Tc5b.top")
commands = ['rmsd @CA', 'distance :3 :7', 'distance :3 :7',
'vector :2 :3']
actlist = ActionList(commands, top=traj.top)
for frame in traj:
actlist.compute(frame)
aa_eq(pt.rmsd(traj, mask='@CA'), actlist.data[0])
aa_eq(pt.distance(traj, ':3 :7'), actlist.data[1])
aa_eq(pt.distance(traj, ':3 :7'), actlist.data[2])
aa_eq(
pt.vector.vector_mask(
traj(rmsfit=(0, '@CA')),
':2 :3'),
actlist.data[3].values)
def test_constructor_from_command_list_TrajectoryIterator(self):
traj = pt.iterload("./data/Tc5b.x", "./data/Tc5b.top")
commands = [
'rmsd @CA', 'distance :3 :7', 'distance :3 :7', 'vector :2 :3'
]
dslist = CpptrajDatasetList()
actlist = ActionList(commands, traj.top, dslist=dslist)
d0 = dslist.add('ref_frame', 'my_ref')
d0.add_frame(traj[3])
for frame in traj:
actlist.compute(frame)
aa_eq(pt.rmsd(traj, mask='@CA'), dslist[0])
aa_eq(pt.distance(traj, ':3 :7'), dslist[1])
aa_eq(pt.distance(traj, ':3 :7'), dslist[2])
aa_eq(pt.vector.vector_mask(traj(rmsfit=(0, '@CA')), ':2 :3'),
dslist[3].values)
def candidatevalues(thread):
# Returns a space-separated string containing all the candidate OP values requested by the user in the form of the
# candidateops list object.
output = ''
traj = pytraj.iterload(thread.start_name, thread.prmtop)
for index in range(0, len(candidateops[0])):
value = pytraj.distance(traj,
mask=candidateops[0][index] + ' ' +
candidateops[1][index])
output += str(value) + ' '
return output
def test_residue_distance(self):
traj = pt.iterload(tz2_trajin, tz2_top)
top = traj.top
ref = traj[0]
top.set_reference(ref)
ref.top = top
indices_smaler = pt.select_atoms(':3@CA <:5.0', top)
ca_indices = pt.select_atoms(':3@CA', traj.top)
all_pairs_smaller = list(product(ca_indices, indices_smaler))
pt.tools.flatten(pt.distance(ref, all_pairs_smaller))
def test_residue_distance(self):
traj = pt.iterload("./data/tz2.nc", "./data/tz2.parm7")
top = traj.top
ref = traj[0]
top.set_distance_mask_reference(ref)
ref.top = top
indices_smaler = pt.select_atoms(':3@CA <:5.0', top)
ca_indices = pt.select_atoms(':3@CA', traj.top)
all_pairs_smaller = list(product(ca_indices, indices_smaler))
distances = pt.tools.flatten(pt.distance(ref, all_pairs_smaller))
def test_constructor_from_command_list_TrajectoryIterator(self):
traj = pt.iterload("./data/Tc5b.x", "./data/Tc5b.top")
commands = ['rmsd @CA', 'distance :3 :7', 'distance :3 :7',
'vector :2 :3']
dslist = CpptrajDatasetList()
actlist = ActionList(commands, traj.top, dslist=dslist)
d0 = dslist.add('ref_frame', 'my_ref')
d0.add_frame(traj[3])
for frame in traj:
actlist.compute(frame)
aa_eq(pt.rmsd(traj, mask='@CA'), dslist[0])
aa_eq(pt.distance(traj, ':3 :7'), dslist[1])
aa_eq(pt.distance(traj, ':3 :7'), dslist[2])
aa_eq(
pt.vector.vector_mask(
traj(rmsfit=(0, '@CA')),
':2 :3'),
dslist[3].values)
def test_pairwise(self):
traj = pt.iterload('data/tz2.nc', 'data/tz2.parm7')
distances = pt.pairwise_distance(traj, '@CA', '@CB')[0]
ca_indices = pt.select_atoms('@CA', traj.top)
cb_indices = pt.select_atoms('@CB', traj.top)
known_shape = (traj.n_frames, len(ca_indices), len(cb_indices))
assert known_shape == distances.shape, 'distance array shape'
slow_distances = []
for ca_i in ca_indices:
for cb_i in cb_indices:
slow_distances.append(pt.distance(traj, [ca_i, cb_i]))
slow_distances = np.array(slow_distances).T
aa_eq(slow_distances.flatten(), distances.flatten())
def test_calc_atomicfluct_with_unitcell(self):
# use iterload for load_batch
traj = pt.iterload("./data/tz2.ortho.nc", "./data/tz2.ortho.parm7")
state = pt.load_cpptraj_state('''
distance :3 :7
atomicfluct @CA out output/test.agr
distance :3 :7''', traj)
state.run()
# use `load` method
t0 = pt.load("./data/tz2.ortho.nc", "./data/tz2.ortho.parm7")
data = pt.atomicfluct(traj, '@CA')
aa_eq(data, state.data[-2].values)
# make sure that traj's coordinates were not altered
# https://github.com/Amber-MD/pytraj/issues/1166
aa_eq(pt.distance(t0, ':3 :7'), state.data[-1])
aa_eq(traj.xyz, t0.xyz)
def test_calc_atomicfluct_with_unitcell(self):
# use iterload for load_batch
traj = pt.iterload(fn('tz2.ortho.nc'), fn('tz2.ortho.parm7'))
state = pt.load_cpptraj_state('''
distance :3 :7
atomicfluct @CA out output/test.agr
distance :3 :7''', traj)
state.run()
# use `load` method
t0 = pt.load(fn('tz2.ortho.nc'), fn('tz2.ortho.parm7'))
data = pt.atomicfluct(traj, '@CA')
aa_eq(data, state.data[-2].values)
# make sure that traj's coordinates were not altered
# https://github.com/Amber-MD/pytraj/issues/1166
aa_eq(pt.distance(t0, ':3 :7'), state.data[-1])
aa_eq(traj.xyz, t0.xyz)
def test_calculate_distance_without_specifying_n_frames(self):
# TrajectoryIterator
traj = pt.iterload(fn('Tc5b.x'), fn('Tc5b.top'))
arr = pt.distance(traj(stop=4), [0, 5])
arr1 = pt.distance(traj(stop=4), [0, 5], n_frames=4)
assert np.all(arr == arr1)
arr2 = pt.distance(traj(stop=1000), [0, 5])
arr3 = pt.distance(traj(stop=traj.n_frames), [0, 5])
assert np.all(arr2 == arr3)
# Trajectory
traj = traj[:]
arr = pt.distance(traj(stop=4), [0, 5])
arr1 = pt.distance(traj(stop=4), [0, 5], n_frames=4)
assert np.all(arr == arr1)
arr2 = pt.distance(traj(stop=1000), [0, 5])
arr3 = pt.distance(traj(stop=traj.n_frames), [0, 5])
assert np.all(arr2 == arr3)
def test_0(self):
from itertools import product
import numpy as np
traj = pt.iterload(fn('Tc5b.x'), fn('Tc5b.top'))
top = traj.top
d0 = pt.mindist(traj, "@CA @CB")
i0 = top("@CA").indices
i1 = top("@CB").indices
combinations = np.array(list(product(i0, i1)))
d1 = pt.distance(traj, combinations).T
min_list = []
for arr0 in d1:
min_list.append(np.min(arr0))
aa_eq(d0, min_list)
d0 = pt.mindist(traj, [[0, 1], [2, 3]])
d1 = pt.mindist(traj, '@1,2 @3,4')
aa_eq(d0, d1)
def test_calculate_distance_without_specifying_n_frames(self):
# TrajectoryIterator
import numpy as np
traj = pt.iterload("./data/Tc5b.x", "./data/Tc5b.top")
arr = pt.distance(traj(stop=4), [0, 5])
arr1 = pt.distance(traj(stop=4), [0, 5], n_frames=4)
assert np.all(arr == arr1)
arr2 = pt.distance(traj(stop=1000), [0, 5])
arr3 = pt.distance(traj(stop=traj.n_frames), [0, 5])
assert np.all(arr2 == arr3)
# Trajectory
traj = traj[:]
arr = pt.distance(traj(stop=4), [0, 5])
arr1 = pt.distance(traj(stop=4), [0, 5], n_frames=4)
assert np.all(arr == arr1)
arr2 = pt.distance(traj(stop=1000), [0, 5])
arr3 = pt.distance(traj(stop=traj.n_frames), [0, 5])
assert np.all(arr2 == arr3)
def test_c_command_style(self):
traj = pt.iterload(fn('tz2.nc'), fn('tz2.parm7'))
angle_ = pt.angle(traj, ':3 :4 :5')
distance_ = pt.distance(traj, '@10 @20')
data = pt.pmap(['angle :3 :4 :5', 'distance @10 @20'], traj, n_cores=2)
assert isinstance(data, OrderedDict), 'must be OrderDict'
arr = pt.tools.dict_to_ndarray(data)
aa_eq(angle_, arr[0])
aa_eq(distance_, arr[1])
# as whole text, case 1
data = pt.pmap(
'''angle :3 :4 :5
distance @10 @20''', traj, n_cores=2)
assert isinstance(data, OrderedDict), 'must be OrderDict'
arr = pt.tools.dict_to_ndarray(data)
aa_eq(angle_, arr[0])
aa_eq(distance_, arr[1])
def test_c_command_style(self):
traj = pt.iterload("data/tz2.nc", "data/tz2.parm7")
angle_ = pt.angle(traj, ':3 :4 :5')
distance_ = pt.distance(traj, '@10 @20')
data = pt.pmap(['angle :3 :4 :5', 'distance @10 @20'], traj, n_cores=2)
assert isinstance(data, OrderedDict), 'must be OrderDict'
arr = pt.tools.dict_to_ndarray(data)
aa_eq(angle_, arr[0])
aa_eq(distance_, arr[1])
# as whole text, case 1
data = pt.pmap('''angle :3 :4 :5
distance @10 @20''',
traj,
n_cores=2)
assert isinstance(data, OrderedDict), 'must be OrderDict'
arr = pt.tools.dict_to_ndarray(data)
aa_eq(angle_, arr[0])
aa_eq(distance_, arr[1])
def test_different_cores(self):
# use different frame_slice with different n_cores to test
REF_0 = pt.iterload("./data/tz2.nc", "./data/tz2.parm7")[0]
for frame_slice in [(0, 100),
(10, 100, 3),
(50, 80, 2),
(51, 80, 3), ]:
traj = pt.iterload("./data/tz2.nc",
"./data/tz2.parm7",
frame_slice=frame_slice)
saved_angle = pt.angle(traj, ':3 :7 :9')
saved_dist = pt.distance(traj, ':2 :10')
saved_rmsd = pt.rmsd(traj, ref=REF_0, mask='@CA')
lines = ['angle :3 :7 :9', 'distance :2 :10']
for n_cores in [2, 3]:
data_list = [worker_state(rank, n_cores, traj, lines)
for rank in range(n_cores)]
final_data = concat_dict([x[1] for x in data_list])
aa_eq(final_data['Ang_00002'], saved_angle)
aa_eq(final_data['Dis_00003'], saved_dist)
def test_hbonds_from_pdb(self):
traj = pt.load('data/1L2Y.pdb')
hb = pt.search_hbonds(traj)
state = pt.load_cpptraj_state('''
parm data/1L2Y.pdb
trajin data/1L2Y.pdb
hbond series
''')
state.run()
for data_p, data_cpp in zip(hb.data, state.data[1:]):
assert len(
data_p) == traj.n_frames == 38, 'size of dataset must be 38'
aa_eq(data_p, data_cpp)
# make sure distances are smaller than cutoff
distance_cutoff = 2.5
angle_cutoff = 135.
hb = pt.search_hbonds(traj)
distances = pt.distance(traj, hb.get_amber_mask()[0])
angles = pt.angles(traj, hb.get_amber_mask()[1])
dist_indices = np.where(distances > distance_cutoff)
angle_indices = np.where(angles < angle_cutoff)
print('FILL ME', dist_indices, angle_indices)
saved_donor_acceptors = ['ASP9_OD2-ARG16_NH1-HH12',
'ASP9_OD2-ARG16_NH2-HH22',
'ASP9_OD2-ARG16_NE-HE',
'ASP9_OD2-ARG16_NH2-HH21',
'ASP9_OD2-ARG16_NH1-HH11']
donor_acceptors = pt.search_hbonds(traj, ':9,16').donor_acceptor
assert saved_donor_acceptors == donor_acceptors, 'saved_donor_acceptors'
aa_eq(hb.total_solute_hbonds(), hb.data['total_solute_hbonds'])
def test_iterload_and_load_remd(self):
# iterload_remd
traj = pt.iterload_remd("data/Test_RemdTraj/rem.nc.000",
"data/Test_RemdTraj/ala2.99sb.mbondi2.parm7",
T=300.0)
for frame in traj:
assert frame.temperature == 300.0, 'frame temperature must be 300.0 K'
dist = pt.distance(traj, '@10 @20')
state = pt.load_cpptraj_state(self.trajin_text)
state.run()
aa_eq(dist, state.data[-1])
# load_remd
traj2 = pt.load_remd("data/Test_RemdTraj/rem.nc.000",
"data/Test_RemdTraj/ala2.99sb.mbondi2.parm7",
T=300.0)
aa_eq(traj.xyz, traj2.xyz)
# with Topology
traj2 = pt.iterload_remd("data/Test_RemdTraj/rem.nc.000",
top=traj.top,
T=300.0)
aa_eq(traj.xyz, traj2.xyz)
import pytraj as pt
# use `iterload` to save memory
traj = pt.iterload("../tests/data/tz2.ortho.nc",
"../tests/data/tz2.ortho.parm7")
print(traj)
# perform distance calculation with cpptraj mask
pt.distance(traj, ':2 :3') # index starts from 1
pt.distance(traj, [':2 :3', '@CA @CB'])
# perform distance calculation with atom_indices array
pt.distance(traj, [[2, 5], [7, 9], [10, 13]]) # index starts from 0
import pytraj as pt
from pytraj.testing import aa_eq
comm = MPI.COMM_WORLD
# end. you are free to update anything below here
# split remd.x.000 to N cores and do calc_surf in parallel
root_dir = "data/"
traj_name = root_dir + "tz2.ortho.nc"
parm_name = root_dir + "tz2.ortho.parm7"
# load to TrajectoryIterator
traj = pt.iterload(traj_name, parm_name)
# save `total_arr` to rank=0
# others: total_arr = None
total_arr = pt.pmap_mpi(
['autoimage', 'center :2', 'distance :3 :7', 'angle :3 :7 :8'], traj)
if comm.rank != 0:
assert total_arr is None
if comm.rank == 0:
# assert to serial
from pytraj.tools import dict_to_ndarray
arr = dict_to_ndarray(total_arr)
t0 = pt.center(traj[:].autoimage(), ':2')
aa_eq(pt.distance(t0, ':3 :7'), arr[0])
aa_eq(pt.angle(t0, ':3 :7 :8'), arr[1])
def test_pytraj():
print('pytraj')
traj = pt.iterload('GAAC3.1000frames.nc', 'GAAC.parm7', frame_slice=(0, 1000))
data = pt.distance(traj, masklist)
usage = '''python ./plot_bond_distance.py input.parm7 input.rst7
'''
import sys
import pytraj as pt
top, crd = sys.argv[1:]
traj = pt.iterload(crd, top)
indices = traj.top.bond_indices
distances = pt.distance(traj, indices)
from matplotlib import pyplot as plt
try:
import seaborn as snb
snb.set()
except ImportError:
pass
plt.plot(distances, 'bo')
pt.show()