def nanaverage(a, weights, **kwargs):
"""
compute the weighted average with nans ignored
"""
avg = da.nansum(a * weights, **kwargs)
tot = da.nansum(weights, **kwargs)
return nandiv(avg, tot)
def _weighted_spatial_average(data, cosfield):
""" Calculate weighted spatial average. """
if isinstance(data, xr.DataArray):
data = data.data
if isinstance(data, np.ndarray):
data = da.from_array(data, chunks=(1000, 1000))
return da.nansum(data * cosfield) / da.nansum(cosfield)
def test_nan():
x = np.array([[1, np.nan, 3, 4], [5, 6, 7, np.nan], [9, 10, 11, 12]])
d = da.from_array(x, chunks=(2, 2))
assert_eq(np.nansum(x), da.nansum(d))
assert_eq(np.nansum(x, axis=0), da.nansum(d, axis=0))
assert_eq(np.nanmean(x, axis=1), da.nanmean(d, axis=1))
assert_eq(np.nanmin(x, axis=1), da.nanmin(d, axis=1))
assert_eq(np.nanmax(x, axis=(0, 1)), da.nanmax(d, axis=(0, 1)))
assert_eq(np.nanvar(x), da.nanvar(d))
assert_eq(np.nanstd(x, axis=0), da.nanstd(d, axis=0))
assert_eq(np.nanargmin(x, axis=0), da.nanargmin(d, axis=0))
assert_eq(np.nanargmax(x, axis=0), da.nanargmax(d, axis=0))
assert_eq(np.nanprod(x), da.nanprod(d))
def lj(cluster, do_forces=True, *parameters):
if cluster.ndim == 1:
cluster = cluster.reshape(-1, 3)
diff = distance_matrix(cluster)
r2 = (diff**2).sum(-1)
energy = da.nansum(potential(r2, *parameters)) / 2.
if do_forces:
forces = da.nansum(gradient(r2, *parameters)[:, :, np.newaxis] * diff,
axis=0)
return energy, forces
else:
return energy
def test_nan():
x = np.array([[1, np.nan, 3, 4], [5, 6, 7, np.nan], [9, 10, 11, 12]])
d = da.from_array(x, blockshape=(2, 2))
assert eq(np.nansum(x), da.nansum(d))
assert eq(np.nansum(x, axis=0), da.nansum(d, axis=0))
assert eq(np.nanmean(x, axis=1), da.nanmean(d, axis=1))
assert eq(np.nanmin(x, axis=1), da.nanmin(d, axis=1))
assert eq(np.nanmax(x, axis=(0, 1)), da.nanmax(d, axis=(0, 1)))
assert eq(np.nanvar(x), da.nanvar(d))
assert eq(np.nanstd(x, axis=0), da.nanstd(d, axis=0))
assert eq(np.nanargmin(x, axis=0), da.nanargmin(d, axis=0))
assert eq(np.nanargmax(x, axis=0), da.nanargmax(d, axis=0))
with ignoring(AttributeError):
assert eq(np.nanprod(x), da.nanprod(d))
def test_nan():
x = np.array([[1, np.nan, 3, 4],
[5, 6, 7, np.nan],
[9, 10, 11, 12]])
d = da.from_array(x, chunks=(2, 2))
assert_eq(np.nansum(x), da.nansum(d))
assert_eq(np.nansum(x, axis=0), da.nansum(d, axis=0))
assert_eq(np.nanmean(x, axis=1), da.nanmean(d, axis=1))
assert_eq(np.nanmin(x, axis=1), da.nanmin(d, axis=1))
assert_eq(np.nanmax(x, axis=(0, 1)), da.nanmax(d, axis=(0, 1)))
assert_eq(np.nanvar(x), da.nanvar(d))
assert_eq(np.nanstd(x, axis=0), da.nanstd(d, axis=0))
assert_eq(np.nanargmin(x, axis=0), da.nanargmin(d, axis=0))
assert_eq(np.nanargmax(x, axis=0), da.nanargmax(d, axis=0))
assert_eq(nanprod(x), da.nanprod(d))
def compute_maf(X):
r"""Compute minor allele frequencies.
It assumes that ``X`` encodes 0, 1, and 2 representing the number
of alleles (or dosage), or ``NaN`` to represent missing values.
Parameters
----------
X : array_like
Genotype matrix.
Returns
-------
array_like
Minor allele frequencies.
Examples
--------
.. doctest::
>>> from numpy.random import RandomState
>>> from limix.qc import compute_maf
>>>
>>> random = RandomState(0)
>>> X = random.randint(0, 3, size=(100, 10))
>>>
>>> print(compute_maf(X)) # doctest: +FLOAT_CMP
[0.49 0.49 0.445 0.495 0.5 0.45 0.48 0.48 0.47 0.435]
"""
import dask.array as da
import xarray as xr
from pandas import DataFrame
from numpy import isnan, logical_not, minimum, nansum
if isinstance(X, da.Array):
s0 = da.nansum(X, axis=0).compute()
denom = 2 * (X.shape[0] - da.isnan(X).sum(axis=0)).compute()
elif isinstance(X, DataFrame):
s0 = X.sum(axis=0, skipna=True)
denom = 2 * logical_not(X.isna()).sum(axis=0)
elif isinstance(X, xr.DataArray):
if "sample" in X.dims:
kwargs = {"dim": "sample"}
else:
kwargs = {"axis": 0}
s0 = X.sum(skipna=True, **kwargs)
denom = 2 * logical_not(isnan(X)).sum(**kwargs)
else:
s0 = nansum(X, axis=0)
denom = 2 * logical_not(isnan(X)).sum(axis=0)
s0 = s0 / denom
s1 = 1 - s0
maf = minimum(s0, s1)
if hasattr(maf, "name"):
maf.name = "maf"
return maf
def test_reduction_names():
x = da.ones(5, chunks=(2,))
assert x.sum().name.startswith('sum')
assert 'max' in x.max().name.split('-')[0]
assert x.var().name.startswith('var')
assert x.all().name.startswith('all')
assert any(k[0].startswith('nansum') for k in da.nansum(x).dask)
assert x.mean().name.startswith('mean')
def test_nan():
x = np.array([[1, np.nan, 3, 4],
[5, 6, 7, np.nan],
[9, 10, 11, 12]])
d = da.from_array(x, blockshape=(2, 2))
assert eq(np.nansum(x), da.nansum(d))
assert eq(np.nansum(x, axis=0), da.nansum(d, axis=0))
assert eq(np.nanmean(x, axis=1), da.nanmean(d, axis=1))
assert eq(np.nanmin(x, axis=1), da.nanmin(d, axis=1))
assert eq(np.nanmax(x, axis=(0, 1)), da.nanmax(d, axis=(0, 1)))
assert eq(np.nanvar(x), da.nanvar(d))
assert eq(np.nanstd(x, axis=0), da.nanstd(d, axis=0))
assert eq(np.nanargmin(x, axis=0), da.nanargmin(d, axis=0))
assert eq(np.nanargmax(x, axis=0), da.nanargmax(d, axis=0))
with ignoring(AttributeError):
assert eq(np.nanprod(x), da.nanprod(d))
def test_reduction_names():
x = da.ones(5, chunks=(2, ))
assert x.sum().name.startswith("sum")
assert "max" in x.max().name.split("-")[0]
assert x.var().name.startswith("var")
assert x.all().name.startswith("all")
assert any(k[0].startswith("nansum") for k in da.nansum(x).dask)
assert x.mean().name.startswith("mean")
def test_reduction_names():
x = da.ones(5, chunks=(2,))
assert x.sum().name.startswith('sum')
assert 'max' in x.max().name.split('-')[0]
assert x.var().name.startswith('var')
assert x.all().name.startswith('all')
assert any(k[0].startswith('nansum') for k in da.nansum(x).dask)
assert x.mean().name.startswith('mean')
def evaluate(cluster, do_forces=True):
if cluster.ndim == 1:
cluster = cluster.reshape(-1, 3)
if NCPUS > cluster.shape[0]:
chunks = 1
else:
chunks = cluster.shape[0] // NCPUS
darr = da.from_array(cluster, chunks=chunks)
diff, r2, _ = distance_matrix(darr)
energy = da.nansum(potential(r2)) / 2.
if do_forces:
forces = da.nansum(gradient(r2)[:, :, np.newaxis] * diff, axis=0)
return energy.compute(), forces.compute()
else:
return energy.compute()
def update_velocities(position, velocity, mass, G, epsilon):
"""Calculate the interactions between all particles and update the velocities.
Args:
position (dask array): dask array of all particle positions in cartesian coordinates.
velocity (dask array): dask array of all particle velocities in cartesian coordinates.
mass (dask array): dask array of all particle masses.
G (float): gravitational constant.
epsilon (float): softening parameter.
Returns:
velocity: updated particle velocities in cartesian coordinates.
"""
dx = da.subtract.outer(position[:, 0], position[:, 0])
dy = da.subtract.outer(position[:, 1], position[:, 1])
dz = da.subtract.outer(position[:, 2], position[:, 2])
r2 = da.square(dx) + da.square(dy) + da.square(dz) + da.square(epsilon)
#
coef = -G * mass[:]
ax = coef * dx
ay = coef * dy
az = coef * dz
#
ax_scaled = da.divide(ax, r2)
ay_scaled = da.divide(ay, r2)
az_scaled = da.divide(az, r2)
#
total_ax = da.nansum(ax_scaled, axis=1)
total_ay = da.nansum(ay_scaled, axis=1)
total_az = da.nansum(az_scaled, axis=1)
#
velocity_x = da.diag(da.add.outer(da.transpose(velocity)[0], total_ax))
velocity_y = da.diag(da.add.outer(da.transpose(velocity)[1], total_ay))
velocity_z = da.diag(da.add.outer(da.transpose(velocity)[2], total_az))
#
velocity = np.column_stack((velocity_x.compute(), velocity_y.compute(),
velocity_z.compute()))
return velocity
def do_compute(seed, size=int(4e4), radius=300):
with dask.set_options(get=dask.threaded.get):
#da.random.seed(seed)
#arr = (da.random.normal(0.01, 1, (size,3), chunks=size//24)-0.5)*radius
np.random.seed(seed)
c = (np.random.normal(0.01, 1, (size, 3)) - 0.5) * radius
arr = da.from_array(c, chunks=c.shape[0] // NCPUS)
diff = arr[:, np.newaxis, :] - arr[np.newaxis, :, :]
mat = da.sqrt((diff * diff).sum(-1))
inv6 = (1. / mat)**6
pot = 4. * (inv6 * inv6 - inv6)
e = da.nansum(pot) / 2.
return e.compute(num_workers=NCPUS)
def test_reductions():
x = np.arange(5).astype('f4')
a = da.from_array(x, chunks=(2,))
assert eq(da.all(a), np.all(x))
assert eq(da.any(a), np.any(x))
assert eq(da.argmax(a, axis=0), np.argmax(x, axis=0))
assert eq(da.argmin(a, axis=0), np.argmin(x, axis=0))
assert eq(da.max(a), np.max(x))
assert eq(da.mean(a), np.mean(x))
assert eq(da.min(a), np.min(x))
assert eq(da.nanargmax(a, axis=0), np.nanargmax(x, axis=0))
assert eq(da.nanargmin(a, axis=0), np.nanargmin(x, axis=0))
assert eq(da.nanmax(a), np.nanmax(x))
assert eq(da.nanmin(a), np.nanmin(x))
assert eq(da.nansum(a), np.nansum(x))
assert eq(da.nanvar(a), np.nanvar(x))
assert eq(da.nanstd(a), np.nanstd(x))
def test_reductions():
x = np.arange(5).astype('f4')
a = da.from_array(x, blockshape=(2, ))
assert eq(da.all(a), np.all(x))
assert eq(da.any(a), np.any(x))
assert eq(da.argmax(a, axis=0), np.argmax(x, axis=0))
assert eq(da.argmin(a, axis=0), np.argmin(x, axis=0))
assert eq(da.max(a), np.max(x))
assert eq(da.mean(a), np.mean(x))
assert eq(da.min(a), np.min(x))
assert eq(da.nanargmax(a, axis=0), np.nanargmax(x, axis=0))
assert eq(da.nanargmin(a, axis=0), np.nanargmin(x, axis=0))
assert eq(da.nanmax(a), np.nanmax(x))
assert eq(da.nanmin(a), np.nanmin(x))
assert eq(da.nansum(a), np.nansum(x))
assert eq(da.nanvar(a), np.nanvar(x))
assert eq(da.nanstd(a), np.nanstd(x))
def compute_maf(X):
r"""Compute minor allele frequencies.
It assumes that ``X`` encodes 0, 1, and 2 representing the number
of alleles (or dosage), or ``NaN`` to represent missing values.
Parameters
----------
X : array_like
Genotype matrix.
Returns
-------
array_like
Minor allele frequencies.
Examples
--------
.. doctest::
>>> from numpy.random import RandomState
>>> from limix.qc import compute_maf
>>>
>>> random = RandomState(0)
>>> X = random.randint(0, 3, size=(100, 10))
>>>
>>> print(compute_maf(X)) # doctest: +FLOAT_CMP
[0.49 0.49 0.445 0.495 0.5 0.45 0.48 0.48 0.47 0.435]
"""
import dask.array as da
from numpy import isnan, logical_not, minimum, nansum
if isinstance(X, da.Array):
s0 = da.nansum(X, axis=0).compute()
denom = 2 * (X.shape[0] - da.isnan(X).sum(axis=0)).compute()
else:
s0 = nansum(X, axis=0)
denom = 2 * logical_not(isnan(X)).sum(axis=0)
s0 = s0 / denom
s1 = 1 - s0
return minimum(s0, s1)
def ds(self):
if self._ds is None:
file_exists = os.path.exists(self._result_file)
reprocess = not file_exists or self._reprocess
if reprocess:
if file_exists:
print('Old file exists ' + self._result_file)
#print('Removing old file ' + self._result_file)
#shutil.rmtree(self._result_file)
ds_data = OrderedDict()
to_seconds = np.vectorize(
lambda x: x.seconds + x.microseconds / 1E6)
print('Processing binary data...')
xx, yy, zz = self._loadgrid()
if xx is None:
if self._from_nc:
print('Processing existing netcdf...')
fn = self._result_file[:-5] + '_QC_raw.nc'
if os.path.exists(fn):
ds_temp = xr.open_dataset(self._result_file[:-5] +
'_QC_raw.nc',
chunks={'time': 50})
u = da.transpose(ds_temp['U'].data,
axes=[3, 0, 1, 2])
v = da.transpose(ds_temp['V'].data,
axes=[3, 0, 1, 2])
w = da.transpose(ds_temp['W'].data,
axes=[3, 0, 1, 2])
tt = ds_temp['time']
te = (tt - tt[0]) / np.timedelta64(1, 's')
xx = ds_temp['x'].values
yy = ds_temp['y'].values
zz = ds_temp['z'].values
else:
print('USING OLD ZARR DATA')
ds_temp = xr.open_zarr(self._result_file)
u = da.transpose(ds_temp['U'].data,
axes=[3, 0, 1, 2])
v = da.transpose(ds_temp['V'].data,
axes=[3, 0, 1, 2])
w = da.transpose(ds_temp['W'].data,
axes=[3, 0, 1, 2])
tt = ds_temp['time']
te = (tt - tt[0]) / np.timedelta64(1, 's')
xx = ds_temp['x'].values
yy = ds_temp['y'].values
zz = ds_temp['z'].values
print('ERROR: No NetCDF data found for ' +
self._xml_file)
#return None
# print(u.shape)
else:
tt, uvw = self._loaddata(xx, yy, zz)
if tt is None:
print('ERROR: No binary data found for ' +
self._xml_file)
return None
# calculate the elapsed time from the Timestamp objects and then convert to datetime64 datatype
te = to_seconds(tt - tt[0])
tt = pd.to_datetime(tt)
uvw = uvw.persist()
u = uvw[:, :, :, :, 0]
v = uvw[:, :, :, :, 1]
w = uvw[:, :, :, :, 2]
# u = xr.DataArray(uvw[:,:,:,:,0], coords=[tt, xx, yy, zz], dims=['time','x', 'y', 'z'],
# name='U', attrs={'standard_name': 'sea_water_x_velocity', 'units': 'm s-1'})
# v = xr.DataArray(uvw[:,:,:,:,1], coords=[tt, xx, yy, zz], dims=['time', 'x', 'y', 'z'],
# name='V', attrs={'standard_name': 'sea_water_x_velocity', 'units': 'm s-1'})
# w = xr.DataArray(uvw[:,:,:,:,2], coords=[tt, xx, yy, zz], dims=['time', 'x', 'y', 'z'],
# name='W', attrs={'standard_name': 'upward_sea_water_velocity', 'units': 'm s-1'})
if xx is None:
print('No data found')
return None
u = u.persist()
v = v.persist()
w = w.persist()
dx = float(xx[1] - xx[0])
dy = float(yy[1] - yy[0])
dz = float(zz[1] - zz[0])
if self._norm_dims:
exp = self._result_root.split('/')[4]
runSheet = pd.read_csv('~/RunSheet-%s.csv' % exp)
runSheet = runSheet.set_index('RunID')
runDetails = runSheet.ix[int(self.run_id[-2:])]
T = runDetails['T (s)']
h = runDetails['h (m)']
D = runDetails['D (m)']
ww = te / T
om = 2. * np.pi / T
d_s = (2. * 1E-6 / om)**0.5
bl = 3. * np.pi / 4. * d_s
if exp == 'Exp6':
if D == 0.1:
dy_c = (188. + 82.) / 2
dx_c = 39.25
cx = dx_c / 1000.
cy = dy_c / 1000.
else:
dy_c = (806. + 287.) / 2. * 0.22
dx_c = 113 * 0.22
cx = dx_c / 1000.
cy = dy_c / 1000.
elif exp == 'Exp8':
dy_c = 624 * 0.22
dx_c = 15
cx = dx_c / 1000.
cy = dy_c / 1000.
xn = (xx + (D / 2. - cx)) / D
yn = (yy - cy) / D
zn = zz / h
xnm, ynm = np.meshgrid(xn, yn)
rr = np.sqrt(xnm**2. + ynm**2)
cylMask = rr < 0.5
nanPlane = np.ones(cylMask.shape)
nanPlane[cylMask] = np.nan
nanPlane = nanPlane.T
nanPlane = nanPlane[np.newaxis, :, :, np.newaxis]
u = u * nanPlane
v = v * nanPlane
w = w * nanPlane
if D == 0.1:
xInds = xn > 3.
else:
xInds = xn > 2.
blInd = np.argmax(zn > bl / h)
blPlane = int(round(blInd))
Ue = u[:, xInds, :, :]
Ue_bar = da.nanmean(Ue, axis=(1, 2, 3)).compute()
Ue_bl = da.nanmean(Ue[:, :, :, blPlane],
axis=(1, 2)).compute()
inds = ~np.isnan(Ue_bl)
xv = ww[inds] % 1.
xv = xv + np.random.normal(scale=1E-6, size=xv.shape)
yv = Ue_bl[inds]
xy = np.stack([
np.concatenate([xv - 1., xv, xv + 1.]),
np.concatenate([yv, yv, yv])
]).T
xy = xy[xy[:, 0].argsort(), :]
xi = np.linspace(-0.5, 1.5, len(xv) / 8)
n = np.nanmax(xy[:, 1])
# print(n)
# fig,ax = pl.subplots()
# ax.scatter(xy[:,0],xy[:,1]/n)
# print(xy)
spl = si.LSQUnivariateSpline(xy[:, 0],
xy[:, 1] / n,
t=xi,
k=3)
roots = spl.roots()
der = spl.derivative()
slope = der(roots)
inds = np.min(np.where(slope > 0))
dt = (roots[inds] % 1.).mean() - 0.5
tpx = np.arange(0, 0.5, 0.001)
U0_bl = np.abs(spl(tpx + dt).min() * n)
ws = ww - dt
Ue_spl = spl((ws - 0.5) % 1.0 + dt) * n * -1.0
#maxima = spl.derivative().roots()
#Umax = spl(maxima)
#UminIdx = np.argmin(Umax)
#U0_bl = np.abs(Umax[UminIdx]*n)
#ww_at_min = maxima[UminIdx]
#ws = ww - ww_at_min + 0.25
inds = ~np.isnan(Ue_bar)
xv = ww[inds] % 1.
xv = xv + np.random.normal(scale=1E-6, size=xv.shape)
yv = Ue_bar[inds]
xy = np.stack([
np.concatenate([xv - 1., xv, xv + 1.]),
np.concatenate([yv, yv, yv])
]).T
xy = xy[xy[:, 0].argsort(), :]
xi = np.linspace(-0.5, 1.5, len(xv) / 8)
n = np.nanmax(xy[:, 1])
spl = si.LSQUnivariateSpline(xy[:, 0],
xy[:, 1] / n,
t=xi,
k=4)
maxima = spl.derivative().roots()
Umax = spl(maxima)
UminIdx = np.argmin(Umax)
U0_bar = np.abs(Umax[UminIdx] * n)
ww = xr.DataArray(ww, coords=[
tt,
], dims=[
'time',
])
ws = xr.DataArray(ws - 0.5, coords=[
tt,
], dims=[
'time',
])
xn = xr.DataArray(xn, coords=[
xx,
], dims=[
'x',
])
yn = xr.DataArray(yn, coords=[
yy,
], dims=[
'y',
])
zn = xr.DataArray(zn, coords=[
zz,
], dims=[
'z',
])
Ue_bar = xr.DataArray(Ue_bar,
coords=[
tt,
],
dims=[
'time',
])
Ue_bl = xr.DataArray(Ue_bl, coords=[
tt,
], dims=[
'time',
])
Ue_spl = xr.DataArray(Ue_spl,
coords=[
tt,
],
dims=[
'time',
])
ds_data['ww'] = ww
ds_data['ws'] = ws
ds_data['xn'] = xn
ds_data['yn'] = yn
ds_data['zn'] = zn
ds_data['Ue_bar'] = Ue_bar
ds_data['Ue_bl'] = Ue_bl
ds_data['Ue_spl'] = Ue_spl
te = xr.DataArray(te, coords=[
tt,
], dims=[
'time',
])
dims = ['time', 'x', 'y', 'z']
coords = [tt, xx, yy, zz]
ds_data['U'] = xr.DataArray(u,
coords=coords,
dims=dims,
name='U',
attrs={
'standard_name':
'sea_water_x_velocity',
'units': 'm s-1'
})
ds_data['V'] = xr.DataArray(v,
coords=coords,
dims=dims,
name='V',
attrs={
'standard_name':
'sea_water_x_velocity',
'units': 'm s-1'
})
ds_data['W'] = xr.DataArray(w,
coords=coords,
dims=dims,
name='W',
attrs={
'standard_name':
'sea_water_x_velocity',
'units': 'm s-1'
})
ds_data['te'] = te
# stdV = da.nanstd(v)
# stdW = da.nanstd(w)
# thres=7.
if 'U0_bl' in locals():
condition = (da.fabs(v) / U0_bl >
1.5) | (da.fabs(w) / U0_bl > 0.6)
for var in ['U', 'V', 'W']:
ds_data[var].data = da.where(condition, np.nan,
ds_data[var].data)
piv_step_frame = float(
self._xml_root.findall('piv/stepFrame')[0].text)
print('Calculating tensor')
# j = jacobianConv(ds.U, ds.V, ds.W, dx, dy, dz, sigma=1.5)
j = jacobianDask(u, v, w, piv_step_frame, dx, dy, dz)
print('Done')
#j = da.from_array(j,chunks=(20,-1,-1,-1,-1,-1))
# j = jacobianDask(uvw[:,:,:,:,0],uvw[:,:,:,:,1], uvw[:,:,:,:,2], piv_step_frame, dx, dy, dz)
jT = da.transpose(j, axes=[0, 1, 2, 3, 5, 4])
# j = j.persist()
# jT = jT.persist()
jacobianNorm = da.sqrt(
da.nansum(da.nansum(j**2., axis=-1), axis=-1))
strainTensor = (j + jT) / 2.
vorticityTensor = (j - jT) / 2.
strainTensorNorm = da.sqrt(
da.nansum(da.nansum(strainTensor**2., axis=-1), axis=-1))
vorticityTensorNorm = da.sqrt(
da.nansum(da.nansum(vorticityTensor**2., axis=-1),
axis=-1))
divergence = j[:, :, :, :, 0, 0] + j[:, :, :, :, 1,
1] + j[:, :, :, :, 2, 2]
# print(divergence)
omx = vorticityTensor[:, :, :, :, 2, 1] * 2.
omy = vorticityTensor[:, :, :, :, 0, 2] * 2.
omz = vorticityTensor[:, :, :, :, 1, 0] * 2.
divNorm = divergence / jacobianNorm
# divNorm = divNorm.persist()
# divNorm_mean = da.nanmean(divNorm)
# divNorm_std = da.nanstd(divNorm)
dims = ['x', 'y', 'z']
comp = ['u', 'v', 'w']
ds_data['jacobian'] = xr.DataArray(
j,
coords=[tt, xx, yy, zz, comp, dims],
dims=['time', 'x', 'y', 'z', 'comp', 'dims'],
name='jacobian')
ds_data['jacobianNorm'] = xr.DataArray(
jacobianNorm,
coords=[tt, xx, yy, zz],
dims=['time', 'x', 'y', 'z'],
name='jacobianNorm')
ds_data['strainTensor'] = xr.DataArray(
strainTensor,
coords=[tt, xx, yy, zz, comp, dims],
dims=['time', 'x', 'y', 'z', 'comp', 'dims'],
name='strainTensor')
ds_data['vorticityTensor'] = xr.DataArray(
vorticityTensor,
coords=[tt, xx, yy, zz, comp, dims],
dims=['time', 'x', 'y', 'z', 'comp', 'dims'],
name='vorticityTensor')
ds_data['vorticityNorm'] = xr.DataArray(
vorticityTensorNorm,
coords=[tt, xx, yy, zz],
dims=['time', 'x', 'y', 'z'],
name='vorticityNorm')
ds_data['strainNorm'] = xr.DataArray(
strainTensorNorm,
coords=[tt, xx, yy, zz],
dims=['time', 'x', 'y', 'z'],
name='strainNorm')
ds_data['divergence'] = xr.DataArray(
divergence,
coords=[tt, xx, yy, zz],
dims=['time', 'x', 'y', 'z'],
name='divergence')
ds_data['omx'] = xr.DataArray(omx,
coords=[tt, xx, yy, zz],
dims=['time', 'x', 'y', 'z'],
name='omx')
ds_data['omy'] = xr.DataArray(omy,
coords=[tt, xx, yy, zz],
dims=['time', 'x', 'y', 'z'],
name='omy')
ds_data['omz'] = xr.DataArray(omz,
coords=[tt, xx, yy, zz],
dims=['time', 'x', 'y', 'z'],
name='omz')
ds_data['divNorm'] = xr.DataArray(divNorm,
coords=[tt, xx, yy, zz],
dims=['time', 'x', 'y', 'z'],
name='divNorm')
# ds_data['divNorm_mean'] = xr.DataArray(divNorm_mean)
# ds_data['divNorm_std'] = xr.DataArray(divNorm_std)
ds = xr.Dataset(ds_data)
# if self._from_nc:
# for k,v in ds_temp.attrs.items():
# ds.attrs[k]=v
#ds = ds.chunk({'time': 20})
self._append_CF_attrs(ds)
self._append_attrs(ds)
ds.attrs['filename'] = self._result_file
if self._norm_dims:
KC = U0_bl * T / D
delta = (2. * np.pi * d_s) / h
S = delta / KC
ds.attrs['T'] = T
ds.attrs['h'] = h
ds.attrs['D'] = D
ds.attrs['U0_bl'] = U0_bl
ds.attrs['U0_bar'] = U0_bar
ds.attrs['KC'] = KC
ds.attrs['S'] = S
ds.attrs['Delta+'] = ((1E-6 * T)**0.5) / h
ds.attrs['Delta_l'] = 2 * np.pi * d_s
ds.attrs['Delta_s'] = d_s
ds.attrs['Re_D'] = U0_bl * D / 1E-6
ds.attrs['Beta'] = D**2. / (1E-6 * T)
delta = (ds.attrs['dx'] * ds.attrs['dy'] *
ds.attrs['dz'])**(1. / 3.)
dpx = (ds.attrs['pdx'] * ds.attrs['pdy'] *
ds.attrs['pdz'])**(1. / 3.)
delta_px = delta / dpx
dt = ds.attrs['piv_step_ensemble']
# divRMS = da.sqrt(da.nanmean((divergence * dt) ** 2.))
# divRMS = divRMS.persist()
# vorticityTensorNorm.persist()
# velocityError = divRMS/((3./(2.*delta_px**2.))**0.5)
# print(da.percentile(ds_new['vorticityTensorNorm'].data.ravel(),99.))
# print(ds_new['divRMS'])
# print(ds_new['divNorm_mean'])
# vorticityError = divRMS/dt/da.percentile(vorticityTensorNorm.ravel(),99.)
# divNorm_mean = da.nanmean(divNorm)
# divNorm_std = da.nanstd(divNorm)
# print("initial save")
#ds.to_zarr(self._result_file,compute=False)
#ds = xr.open_zarr(self._result_file)
# xstart = np.argmax(xx > 0.05)
# ystart = np.argmax(yy > 0.07)
divRMS = da.sqrt(da.nanmean(
(divergence * dt)**2.)) #.compute()
#divNorm = divergence / jacobianNorm
#divNorm = divNorm.compute()
#divNorm_mean = da.nanmean(divNorm).compute()
#divNorm_std = da.nanstd(divNorm).compute()
velocityError = divRMS / ((3. / (2. * delta_px**2.))**0.5)
vortNorm = vorticityTensorNorm #.compute()
vorticityError = divRMS / dt / np.percentile(
vortNorm.ravel(), 99.)
velocityError, vorticityError = da.compute(
velocityError, vorticityError)
#ds.attrs['divNorm_mean'] = divNorm_mean
#ds.attrs['divNorm_std'] = divNorm_std
ds.attrs['velocityError'] = velocityError
ds.attrs['vorticityError'] = vorticityError
if self._norm_dims:
xInds = (xn > 0.5) & (xn < 2.65)
yInds = (yn > -0.75) & (yn < 0.75)
else:
xInds = range(len(ds['x']))
yInds = range(len(ds['y']))
vrms = (ds['V'][:, xInds, yInds, :]**2.).mean(
dim=['time', 'x', 'y', 'z'])**0.5
wrms = (ds['W'][:, xInds, yInds, :]**2.).mean(
dim=['time', 'x', 'y', 'z'])**0.5
ds.attrs['Vrms'] = float(vrms.compute())
ds.attrs['Wrms'] = float(wrms.compute())
#fig,ax = pl.subplots()
#ax.plot(ds.ws,ds.Ue_spl/U0_bl,color='k')
#ax.plot(ds.ws,ds.Ue_bl/U0_bl,color='g')
#ax.set_xlabel(r'$t/T$')
#ax.set_ylabel(r'$U_{bl}/U_0$')
#fig.savefig(self._result_file[:-4] + 'png',dpi=125)
#pl.close(fig)
# print("second save")
#ds.to_netcdf(self._result_file)
ds.to_zarr(self._result_file, mode='w')
print('Cached ' + self._result_file)
#ds = xr.open_dataset(self._result_file,chunks={'time':20})
ds = xr.open_zarr(self._result_file)
ds.attrs['filename'] = self._result_file
else:
#ds = xr.open_dataset(self._result_file,chunks={'time':20})
ds = xr.open_zarr(self._result_file)
ds.attrs['filename'] = self._result_file
self._ds = ds
return self._ds
def identity_by_state(
ds: Dataset,
*,
call_allele_frequency: Hashable = variables.call_allele_frequency,
merge: bool = True,
) -> Dataset:
"""Compute identity by state (IBS) probabilities between
all pairs of samples.
The IBS probability between a pair of individuals is the
probability that a randomly drawn allele from the first individual
is identical in state with a randomly drawn allele from the second
individual at a single random locus.
Parameters
----------
ds
Dataset containing call genotype alleles.
call_allele_frequency
Input variable name holding call_allele_frequency as defined by
:data:`sgkit.variables.call_allele_frequency_spec`.
If the variable is not present in ``ds``, it will be computed
using :func:`call_allele_frequencies`.
merge
If True (the default), merge the input dataset and the computed
output variables into a single dataset, otherwise return only
the computed output variables.
See :ref:`dataset_merge` for more details.
Returns
-------
A dataset containing :data:`sgkit.variables.stat_identity_by_state_spec`
which is a matrix of pairwise IBS probabilities among all samples.
The dimensions are named ``samples_0`` and ``samples_1``.
Raises
------
NotImplementedError
If the variable holding call_allele_frequency is chunked along the
samples dimension.
Warnings
--------
This method does not currently support datasets that are chunked along the
samples dimension.
Examples
--------
>>> import sgkit as sg
>>> ds = sg.simulate_genotype_call_dataset(n_variant=2, n_sample=3, seed=2)
>>> sg.display_genotypes(ds) # doctest: +NORMALIZE_WHITESPACE
samples S0 S1 S2
variants
0 0/0 1/1 1/0
1 1/1 1/1 1/0
>>> sg.identity_by_state(ds)["stat_identity_by_state"].values # doctest: +NORMALIZE_WHITESPACE
array([[1. , 0.5, 0.5],
[0.5, 1. , 0.5],
[0.5, 0.5, 0.5]])
"""
ds = define_variable_if_absent(
ds,
variables.call_allele_frequency,
call_allele_frequency,
call_allele_frequencies,
)
variables.validate(
ds, {call_allele_frequency: variables.call_allele_frequency_spec}
)
af = da.asarray(ds[call_allele_frequency])
if len(af.chunks[1]) > 1:
raise NotImplementedError(
"identity_by_state does not support chunking in the samples dimension"
)
af0 = da.where(da.isnan(af), 0.0, af)
num = da.einsum("ixj,iyj->xy", af0, af0)
called = da.nansum(af, axis=-1)
count = da.einsum("ix,iy->xy", called, called)
denom = da.where(count == 0, np.nan, count)
new_ds = create_dataset(
{
variables.stat_identity_by_state: (
("samples_0", "samples_1"),
num / denom,
)
}
)
return conditional_merge_datasets(ds, new_ds, merge)
def Weir_Goudet_beta(
ds: Dataset,
*,
stat_identity_by_state: Hashable = variables.stat_identity_by_state,
merge: bool = True,
) -> Dataset:
"""Estimate pairwise beta between all pairs of samples as described
in Weir and Goudet 2017 [1].
Beta is the kinship scaled by the average kinship of all pairs of
individuals in the dataset such that the non-diagonal (non-self) values
sum to zero.
Beta may be corrected to more accurately reflect pedigree based kinship
estimates using the formula
:math:`\\hat{\\beta}^c=\\frac{\\hat{\\beta}-\\hat{\\beta}_0}{1-\\hat{\\beta}_0}`
where :math:`\\hat{\\beta}_0` is the estimated beta between samples which are
known to be unrelated [1].
Parameters
----------
ds
Genotype call dataset.
stat_identity_by_state
Input variable name holding stat_identity_by_state as defined
by :data:`sgkit.variables.stat_identity_by_state_spec`.
If the variable is not present in ``ds``, it will be computed
using :func:`identity_by_state`.
merge
If True (the default), merge the input dataset and the computed
output variables into a single dataset, otherwise return only
the computed output variables.
See :ref:`dataset_merge` for more details.
Returns
-------
A dataset containing :data:`sgkit.variables.stat_Weir_Goudet_beta_spec`
which is a matrix of estimated pairwise kinship relative to the average
kinship of all pairs of individuals in the dataset.
The dimensions are named ``samples_0`` and ``samples_1``.
Examples
--------
>>> import sgkit as sg
>>> ds = sg.simulate_genotype_call_dataset(n_variant=3, n_sample=3, n_allele=10, seed=3)
>>> # sample 2 "inherits" alleles from samples 0 and 1
>>> ds.call_genotype.data[:, 2, 0] = ds.call_genotype.data[:, 0, 0]
>>> ds.call_genotype.data[:, 2, 1] = ds.call_genotype.data[:, 1, 0]
>>> sg.display_genotypes(ds) # doctest: +NORMALIZE_WHITESPACE
samples S0 S1 S2
variants
0 7/1 8/6 7/8
1 9/5 3/6 9/3
2 8/8 8/3 8/8
>>> # estimate beta
>>> ds = sg.Weir_Goudet_beta(ds).compute()
>>> ds.stat_Weir_Goudet_beta.values # doctest: +NORMALIZE_WHITESPACE
array([[ 0.5 , -0.25, 0.25],
[-0.25, 0.25, 0. ],
[ 0.25, 0. , 0.5 ]])
>>> # correct beta assuming least related samples are unrelated
>>> beta = ds.stat_Weir_Goudet_beta
>>> beta0 = beta.min()
>>> beta_corrected = (beta - beta0) / (1 - beta0)
>>> beta_corrected.values # doctest: +NORMALIZE_WHITESPACE
array([[0.6, 0. , 0.4],
[0. , 0.4, 0.2],
[0.4, 0.2, 0.6]])
References
----------
[1] - Bruce, S. Weir, and Jérôme Goudet 2017.
"A Unified Characterization of Population Structure and Relatedness."
Genetics 206 (4): 2085-2103.
"""
ds = define_variable_if_absent(
ds, variables.stat_identity_by_state, stat_identity_by_state, identity_by_state
)
variables.validate(
ds, {stat_identity_by_state: variables.stat_identity_by_state_spec}
)
ibs = ds[stat_identity_by_state].data
# average matching is the mean of non-diagonal elements
num = da.nansum(da.tril(ibs, -1))
denom = da.nansum(da.tril(~da.isnan(ibs), -1))
avg = num / denom
beta = (ibs - avg) / (1 - avg)
new_ds = create_dataset(
{
variables.stat_Weir_Goudet_beta: (
("samples_0", "samples_1"),
beta,
)
}
)
return conditional_merge_datasets(ds, new_ds, merge)
def interm(x, y, axis=None):
n = da.nansum((x > 0.1) & (y > 0.1) & ~da.isnan(x) & ~da.isnan(y),
axis=axis)
o = da.nansum(((x > 0.1) | (y > 0.1)) & ~da.isnan(x) & ~da.isnan(y),
axis=axis)
return n / o
def potential_dask(cluster):
d2 = distances(cluster)
energy = da.nansum(lj(d2))/2.
return energy
import rasterio
import glob
from dask_rasterio import read_raster, write_raster
import dask.array as da
earthstat_dir = "C:/Users/angel/DATA/Earthstat/HarvestedAreaYield175Crops_Geotiff/HarvestedAreaYield175Crops_Geotiff/"
layer = "Production"
ext = ".tif"
selected_files = [file for file in glob.iglob(earthstat_dir + '**/*' + layer + ext, recursive=True)]
map2array=[]
for raster in selected_files:
map2array.append(read_raster(raster))
ds_stack = da.stack(map2array)
with rasterio.open(selected_files[0]) as src:
profile = src.profile
profile.update(compress='lzw')
write_raster(earthstat_dir + "Sum" + layer + ".tif", da.nansum(ds_stack,0), **profile)
