Commit 54c3f5eb authored by René Fritze's avatar René Fritze Committed by René Fritze

[test] add ahypothesis strategy to generate bases in vecarray

parent 960258b5
......@@ -282,10 +282,48 @@ def vector_array_with_ind(draw, ind_length=None, count=1, dtype=None, length=Non
return (*v, draw(ind))
def base_vector_arrays(draw, count=1, dtype=None, max_dim=100):
draw hypothesis control function object
count how many bases do you want
dtype dtype for the generated bases, defaults to `np.float_`
max_dim size limit for the generated
Returns a list of |VectorArray| linear-independent objects of same dim and length
dtype = dtype or np.float_
# simplest way currently of getting a |VectorSpace| to construct our new arrays from
space = draw(vector_arrays(count=1, dtype=dtype, length=hyst.just((1,)), compatible=True)
.filter(lambda x: x[0].space.dim > 0 and x[0].space.dim < max_dim))[0].space
length = space.dim
from scipy.stats import random_correlation
# this lets hypothesis control np's random state too
random = draw(hyst.randoms())
def _eigs():
"""sum must equal to `length` for the scipy construct method"""
min_eig, max_eig = 0.001, 1.
eigs = np.asarray((max_eig-min_eig)*np.random.random(length-1) + min_eig, dtype=float)
return np.append(eigs, [length - np.sum(eigs)])
if length > 1:
mat = [random_correlation.rvs(_eigs(), tol=1e-12) for _ in range(count)]
return [space.from_numpy(m) for m in mat]
scalar = 4*np.random.random((1,1))+0.1
return [space.from_numpy(scalar) for _ in range(count)]
def vector_arrays_with_ind_pairs_same_length(draw, count=1, dtype=None, length=None):
assert count == 1
v = draw(vector_arrays(dtype=dtype, length=length), count)
v = draw(vector_arrays(dtype=dtype, length=length, count=1))
ind = list(valid_inds_of_same_length(v[0],v[0]))
assert len(ind)
ind = hyst.sampled_from(ind)
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