def test_general_node_height_transform_hetero_all(ratios, root_height, keep,
expected_ratios_root):
dic = {}
tree_model = ReparameterizedTimeTreeModel.from_json(
ReparameterizedTimeTreeModel.json_factory(
'tree', '(A:2,(B:1.5,(C:2,D:1):2.5):2.5);', ratios, root_height,
dict(zip('ABCD', [5.0, 3.0, 0.0, 1.0])), **{
'keep_branch_lengths': keep,
'ratios_id': 'ratios',
'root_height_id': 'root_height',
}),
dic,
)
expected = torch.tensor([5.0, 3.0, 0.0, 1.0, 2.0, 4.5, 7.0])
expected_bounds = torch.tensor([5.0, 3.0, 0.0, 1.0, 1.0, 3.0, 5.0])
expected_branch_lengths = torch.tensor([2.0, 1.5, 2.0, 1.0, 2.5, 2.5])
log_det_jacobian = torch.log(expected[5] - expected_bounds[4]) + torch.log(
expected[6] - expected_bounds[5])
assert torch.allclose(
torch.tensor(expected_ratios_root),
torch.cat((dic['ratios'].tensor, dic['root_height'].tensor)),
)
assert torch.allclose(expected, tree_model.node_heights)
assert torch.allclose(expected_bounds, tree_model.transform._bounds)
assert torch.allclose(expected_branch_lengths, tree_model.branch_lengths())
assert torch.allclose(tree_model(), log_det_jacobian)
def tree_model_node_heights_transformed(ratios_list):
tree_model = ReparameterizedTimeTreeModel.json_factory(
'tree',
'(((A,B),C),D);',
ratios_list[:-1],
ratios_list[-1:],
dict(zip('ABCD', [0.0, 0.0, 0.0, 0.0])),
)
return tree_model
def test_general_node_height_transform_hetero(ratios, root_height):
dic = {}
tree_model = ReparameterizedTimeTreeModel.from_json(
ReparameterizedTimeTreeModel.json_factory(
'tree', '(((A,B),C),D);', ratios, root_height,
dict(zip('ABCD', [0.0, 1.0, 4.0, 5.0])), **{
'ratios_id': 'ratios',
'root_height_id': 'root_height'
}),
dic,
)
expected = torch.log((tree_model.node_heights[-2] - 1.0) *
(tree_model.node_heights[-1] - 4.0)).item()
assert tree_model().item() == pytest.approx(expected, 0.0001)
def test_general_node_height_heights_to_ratios(ratios, root_height):
tree_model = ReparameterizedTimeTreeModel.from_json(
ReparameterizedTimeTreeModel.json_factory(
'tree', '(((A,B),C),D);', ratios, root_height,
dict(zip('ABCD', [0.0, 0.0, 0.0, 0.0])), **{
'ratios_id': 'ratios',
'root_height_id': 'root_height'
}),
{},
)
ratios_heights = tree_model.transform.inv(tree_model.node_heights[4:])
assert torch.allclose(
ratios_heights,
torch.tensor(ratios + root_height, dtype=ratios_heights.dtype),
)
def test_general_node_height_transform_hetero_7():
taxa = dict(zip('ABCDEFG', [5.0, 3.0, 0.0, 1.0, 0.0, 5.0, 6.0]))
dic = {}
tree_model = ReparameterizedTimeTreeModel.from_json(
ReparameterizedTimeTreeModel.json_factory(
'tree', '(A,(B,(C,(D,(E,(F,G))))));', [0.5] * (len(taxa) - 2),
[10.0], taxa, **{
'ratios_id': 'ratios',
'root_height_id': 'root_height'
}),
dic,
)
log_det_jacobian = torch.tensor([0.0])
for i in range(len(taxa), 2 * len(taxa) - 2):
log_det_jacobian += (tree_model.node_heights[i + 1] -
tree_model.transform._bounds[i]).log()
assert torch.allclose(tree_model(), log_det_jacobian)
def test_keep_branch_lengths_heights():
dic = {}
tree_model = ReparameterizedTimeTreeModel.from_json(
ReparameterizedTimeTreeModel.json_factory(
'tree', '((((A_0:1.5,B_1:0.5):2.5,C_2:2):2,D_3:3):10,E_12:4);',
[0.0] * 3, [0.0],
dict(
zip(['A_0', 'B_1', 'C_2', 'D_3', 'E_12'],
[0.0, 1.0, 2.0, 3.0, 12.0])), **{
'keep_branch_lengths': True,
'ratios_id': 'ratios',
'root_height_id': 'root_height',
}),
dic,
)
assert torch.allclose(
tree_model.branch_lengths(),
torch.tensor([1.5, 0.5, 2.0, 3.0, 4.0, 2.5, 2.0, 10.0]),
)
def test_treelikelihood_weibull(flu_a_tree_file, flu_a_fasta_file):
taxa_list = []
with open(flu_a_fasta_file) as fp:
for line in fp:
if line.startswith('>'):
taxon = line[1:].strip()
date = float(taxon.split('_')[-1])
taxa_list.append(Taxon(taxon, {'date': date}))
taxa = Taxa('taxa', taxa_list)
site_pattern = {
'id': 'sp',
'type': 'torchtree.evolution.site_pattern.SitePattern',
'alignment': {
"id": "alignment",
"type": "torchtree.evolution.alignment.Alignment",
'datatype': 'nucleotide',
'file': flu_a_fasta_file,
'taxa': 'taxa',
},
}
subst_model = JC69('jc')
site_model = WeibullSiteModel('site_model',
Parameter(None, torch.tensor([[0.1]])), 4)
ratios = [0.5] * 67
root_height = [20.0]
with open(flu_a_tree_file) as fp:
newick = fp.read().strip()
dic = {'taxa': taxa}
tree_model = ReparameterizedTimeTreeModel.from_json(
ReparameterizedTimeTreeModel.json_factory(
'tree_model', newick, ratios, root_height, 'taxa',
**{'keep_branch_lengths': True}),
dic,
)
branch_model = StrictClockModel(None,
Parameter(None, torch.tensor([[0.001]])),
tree_model)
dic['tree_model'] = tree_model
dic['site_model'] = site_model
dic['subst_model'] = subst_model
dic['branch_model'] = branch_model
like = likelihood.TreeLikelihoodModel.from_json(
{
'id': 'like',
'type': 'torchtree.tree_likelihood.TreeLikelihoodModel',
'tree_model': 'tree_model',
'site_model': 'site_model',
'site_pattern': site_pattern,
'substitution_model': 'subst_model',
'branch_model': 'branch_model',
},
dic,
)
assert torch.allclose(torch.tensor([-4618.2062529058]), like())
branch_model._rates.tensor = branch_model._rates.tensor.repeat(3, 1)
site_model._shape.tensor = site_model._shape.tensor.repeat(3, 1)
tree_model._internal_heights.tensor = tree_model._internal_heights.tensor.repeat(
3, 68)
assert torch.allclose(torch.tensor([[-4618.2062529058] * 3]), like())
def create_tree_model(id_: str, taxa: dict, arg):
tree_format = 'newick'
with open(arg.tree) as fp:
if next(fp).upper().startswith('#NEXUS'):
tree_format = 'nexus'
if tree_format == 'nexus':
tree = Tree.get(
path=arg.tree,
schema=tree_format,
tree_offset=0,
preserve_underscores=True,
)
newick = str(tree) + ';'
else:
with open(arg.tree) as fp:
newick = fp.read()
newick = newick.strip()
kwargs = {}
if arg.keep:
kwargs['keep_branch_lengths'] = True
if arg.clock is not None:
dates = [taxon['attributes']['date'] for taxon in taxa['taxa']]
offset = max(dates) - min(dates)
if arg.heights == 'ratio':
ratios = Parameter.json_factory(
f'{id_}.ratios', **{'tensor': 0.1, 'full': [len(dates) - 2]}
)
ratios['lower'] = 0.0
ratios['upper'] = 1.0
root_height = Parameter.json_factory(
f'{id_}.root_height', **{'tensor': [offset + 1.0]}
)
if 'root_height_init' in arg:
root_height['tensor'] = [max(dates) - arg.root_height_init]
elif arg.coalescent == 'skygrid':
root_height['tensor'] = arg.cutoff
root_height['lower'] = offset
tree_model = ReparameterizedTimeTreeModel.json_factory(
id_, newick, ratios, root_height, 'taxa', **kwargs
)
elif arg.heights == 'shift':
shifts = Parameter.json_factory(
f'{id_}.shifts', **{'tensor': 0.1, 'full': [len(dates) - 1]}
)
shifts['lower'] = 0.0
node_heights = {
'id': f'{id_}.heights',
'type': 'TransformedParameter',
'transform': 'torchtree.evolution.tree_height_transform'
'.DifferenceNodeHeightTransform',
'x': shifts,
'parameters': {'tree_model': id_},
}
tree_model = FlexibleTimeTreeModel.json_factory(
id_, newick, node_heights, 'taxa', **kwargs
)
else:
branch_lengths = Parameter.json_factory(
f'{id_}.blens', **{'tensor': 0.1, 'full': [len(taxa['taxa']) * 2 - 3]}
)
branch_lengths['lower'] = 0.0
tree_model = UnRootedTreeModel.json_factory(
id_, newick, branch_lengths, 'taxa', **kwargs
)
return tree_model