def broadcast_and_rechunk(array_tuple, chunks=None):
dest_array_id = max_array_id(array_tuple)
dest_shape = array_tuple[dest_array_id].shape
if chunks is None:
chunks = array_tuple[dest_array_id].chunks
broadcast_list = [None] * len(array_tuple)
for array_id, array in enumerate(array_tuple):
try:
arr_chunks = array.chunks
if arr_chunks != chunks:
broadcast_list[array_id] = (da.broadcast_to(
add_dims_to_broadcast(array, dest_shape),
dest_shape).rechunk(chunks))
elif dest_shape != array.shape:
broadcast_list[array_id] = (da.broadcast_to(
add_dims_to_broadcast(array, dest_shape), dest_shape))
else:
broadcast_list[array_id] = array
except AttributeError:
broadcast_list[array_id] = da.from_array(
array,
chunks=remove_chunks_from_shape(array, dest_shape, chunks))
if dest_shape != array.shape:
broadcast_list[array_id] = (da.broadcast_to(
add_dims_to_broadcast(broadcast_list[array_id],
dest_shape),
dest_shape).rechunk(chunks))
return broadcast_list
def _get_zhai_data_frame(datasets, lat_constraint):
"""Get :class:`pandas.DataFrame` including the data for ``zhai``."""
cl_cube = _get_cube(datasets, 'cl')
wap_cube = _get_cube(datasets, 'wap')
tos_cube = _get_cube(datasets, 'tos')
# Add air_pressure coordinate if necessary
if not cl_cube.coords('air_pressure'):
if cl_cube.coords('altitude'):
add_plev_from_altitude(cl_cube)
elif cl_cube.coords('atmosphere_sigma_coordinate'):
add_sigma_factory(cl_cube)
else:
raise ValueError(f"No 'air_pressure' coord available in cube "
f"{cl_cube.summary(shorten=True)}")
# Apply common mask (only ocean)
mask_2d = da.ma.getmaskarray(tos_cube.core_data())
mask_3d = mask_2d[:, np.newaxis, ...]
mask_3d = da.broadcast_to(mask_3d, cl_cube.shape)
wap_cube.data = da.ma.masked_array(wap_cube.core_data(), mask=mask_2d)
cl_cube.data = da.ma.masked_array(cl_cube.core_data(), mask=mask_3d)
# Calculate SST mean and MBLC fraction
tos_cube = _get_mean_over_subsidence(tos_cube, wap_cube, lat_constraint)
mblc_cube = _get_seasonal_mblc_fraction(cl_cube, wap_cube, lat_constraint)
return pd.DataFrame(
{
'tos': tos_cube.data,
'mblc_fraction': mblc_cube.data
},
index=pd.Index(np.arange(12) + 1, name='month'),
)
def compute(fieldset):
# Calculating vertical weighted average
for f in [fieldset.U, fieldset.V]:
for tind in f.loaded_time_indices:
data = da.sum(f.data[tind, :] * DZ, axis=0) / sum(dz)
data = da.broadcast_to(data, (1, f.grid.zdim, f.grid.ydim, f.grid.xdim))
f.data = f.data_concatenate(f.data, data, tind)
def tsLab(series, seg, label):
segnp = sitk.GetArrayFromImage(seg)
# The mask indicates which entries to ignore.
m3 = da.broadcast_to(segnp != label, series.shape)
smk = da.ma.masked_array(series, m3)
p = smk.mean(axis=[2, 3])
l = p.compute()
return l
def _mask_cube(cube, selections):
cubelist = iris.cube.CubeList()
for id_, select in selections.items():
_cube = cube.copy()
_cube.add_aux_coord(
iris.coords.AuxCoord(id_, units='no_unit', long_name="shape_id"))
select = da.broadcast_to(select, _cube.shape)
_cube.data = da.ma.masked_where(~select, _cube.core_data())
cubelist.append(_cube)
return fix_coordinate_ordering(cubelist.merge_cube())
def add_cell_measure(cube, fx_cube, measure):
"""
Broadcast fx_cube and add it as a cell_measure in
the cube containing the data.
Parameters
----------
cube: iris.cube.Cube
Iris cube with input data.
fx_cube: iris.cube.Cube
Iris cube with fx data.
measure: str
Name of the measure, can be 'area' or 'volume'.
Returns
-------
iris.cube.Cube
Cube with added ancillary variables
Raises
------
ValueError
If measure name is not 'area' or 'volume'.
ValueError
If fx_cube cannot be broadcast to cube.
"""
if measure not in ['area', 'volume']:
raise ValueError(f"measure name must be 'area' or 'volume', "
f"got {measure} instead")
try:
fx_data = da.broadcast_to(fx_cube.core_data(), cube.shape)
except ValueError as exc:
raise ValueError(f"Dimensions of {cube.var_name} and "
f"{fx_cube.var_name} cubes do not match. "
"Cannot broadcast cubes.") from exc
measure = iris.coords.CellMeasure(fx_data,
standard_name=fx_cube.standard_name,
units=fx_cube.units,
measure=measure,
var_name=fx_cube.var_name,
attributes=fx_cube.attributes)
cube.add_cell_measure(measure, range(0, measure.ndim))
logger.debug('Added %s as cell measure in cube of %s.', fx_cube.var_name,
cube.var_name)
def diag_dot(diag_array, x, return_diag=False):
"""Computes dot product between diag_array and x
Parameters
----------
diag_array : array_like, shape (K, ) or (K, 1)
Diagonal entries of a diagonal maitrx
[d1, d2, d3, ..., dk] -> [d1*e1, d2*e2, d2*e3, ..., dk*ek], where ei is the ith unit column vector
x : array_like, shape (K, ...)
return_diag : boolean
If return_diag is True, return broadcasted array prepped for operation
Returns
-------
out : array_like, shape of x
"""
if len(x.shape) not in [1, 2]:
raise ValueError(
"x must have (M, K) or (K, ). Current Shape = {}".format(x.shape))
if diag_array.shape[0] != x.shape[0]:
raise ValueError(
'shapes {} and {} not aligned: {} (dim 0 and 1) != {} (dim 0)'.
format(diag_array.shape, x.shape, diag_array.shape[0], x.shape[0]))
if len(diag_array.shape) not in [1, 2]:
raise ValueError(
'diag_array must have dimension (K, ) or (K, 1). Current shape = {}'
.format(diag_array.shape))
if len(x.shape) == 1:
if len(diag_array.shape) == 2:
d = np.squeeze(diag_array)
else:
d = diag_array
else:
if len(diag_array.shape) == 1:
d = diag_array[:, np.newaxis]
else:
d = diag_array
d = broadcast_to(d, x.shape)
if return_diag:
return d
else:
return np.multiply(d, x)
def coriolis(self, lats, ndim):
"""Compute Coriolis force.
Parameters
----------
lats: iris.coord.Coord
Latitude coordinate.
ndim: int
Number of dimension.
Returns
-------
fcor: da.array
Array containing Coriolis force.
"""
fcor = 2.0 * self.omega * np.sin(np.radians(lats.points))
fcor = fcor[np.newaxis, np.newaxis, :, np.newaxis]
fcor = da.broadcast_to(fcor, ndim)
return fcor
def get_time_weights(cube):
"""Compute the weighting of the time axis.
Parameters
----------
cube: iris.cube.Cube
input cube.
Returns
-------
numpy.array
Array of time weights for averaging.
"""
time = cube.coord('time')
time_weights = time.bounds[..., 1] - time.bounds[..., 0]
time_weights = time_weights.squeeze()
if time_weights.shape == ():
time_weights = da.broadcast_to(time_weights, cube.shape)
else:
time_weights = iris.util.broadcast_to_shape(time_weights, cube.shape,
cube.coord_dims('time'))
return time_weights
def apply(X: Array, YP: Array, BX: Array, BYP: Array) -> Array:
# Collapse selected variant blocks and alphas into single
# new covariate dimension
assert YP.shape[2] == BYP.shape[2]
n_group_covar = n_covar + BYP.shape[2] * n_alpha_1
BYP = BYP.reshape((n_outcome, n_sample_block, -1))
BG = da.concatenate((BX, BYP), axis=-1)
BG = BG.rechunk((-1, None, -1))
assert_block_shape(BG, 1, n_sample_block, 1)
assert_chunk_shape(BG, n_outcome, 1, n_group_covar)
assert_array_shape(BG, n_outcome, n_sample_block, n_group_covar)
YP = YP.reshape((n_outcome, n_sample, -1))
XYP = da.broadcast_to(X, (n_outcome, n_sample, n_covar))
XG = da.concatenate((XYP, YP), axis=-1)
XG = XG.rechunk((-1, None, -1))
assert_block_shape(XG, 1, n_sample_block, 1)
assert_chunk_shape(XG, n_outcome, sample_chunks[0], n_group_covar)
assert_array_shape(XG, n_outcome, n_sample, n_group_covar)
YG = da.map_blocks(
# Block chunks:
# (n_outcome, sample_chunks[0], n_group_covar) @
# (n_outcome, n_group_covar, 1) [after transpose]
lambda x, b: x @ b.transpose((0, 2, 1)),
XG,
BG,
chunks=(n_outcome, sample_chunks, 1),
)
assert_block_shape(YG, 1, n_sample_block, 1)
assert_chunk_shape(YG, n_outcome, sample_chunks[0], 1)
assert_array_shape(YG, n_outcome, n_sample, 1)
YG = da.squeeze(YG, axis=-1).T
assert_block_shape(YG, n_sample_block, 1)
assert_chunk_shape(YG, sample_chunks[0], n_outcome)
assert_array_shape(YG, n_sample, n_outcome)
return YG
def push(array, n, axis):
"""
Dask-aware bottleneck.push
"""
import bottleneck
import dask.array as da
import numpy as np
def _fill_with_last_one(a, b):
# cumreduction apply the push func over all the blocks first so, the only missing part is filling
# the missing values using the last data of the previous chunk
return np.where(~np.isnan(b), b, a)
if n is not None and 0 < n < array.shape[axis] - 1:
arange = da.broadcast_to(
da.arange(array.shape[axis],
chunks=array.chunks[axis],
dtype=array.dtype).reshape(
tuple(size if i == axis else 1
for i, size in enumerate(array.shape))),
array.shape,
array.chunks,
)
valid_arange = da.where(da.notnull(array), arange, np.nan)
valid_limits = (arange - push(valid_arange, None, axis)) <= n
# omit the forward fill that violate the limit
return da.where(valid_limits, push(array, None, axis), np.nan)
# The method parameter makes that the tests for python 3.7 fails.
return da.reductions.cumreduction(
func=bottleneck.push,
binop=_fill_with_last_one,
ident=np.nan,
x=array,
axis=axis,
dtype=array.dtype,
)
def add_ancillary_variable(cube, fx_cube):
"""
Broadcast fx_cube and add it as an ancillary_variable in
the cube containing the data.
Parameters
----------
cube: iris.cube.Cube
Iris cube with input data.
fx_cube: iris.cube.Cube
Iris cube with fx data.
Returns
-------
iris.cube.Cube
Cube with added ancillary variables
Raises
------
ValueError
If fx_cube cannot be broadcast to cube.
"""
try:
fx_data = da.broadcast_to(fx_cube.core_data(), cube.shape)
except ValueError as exc:
raise ValueError(f"Dimensions of {cube.var_name} and "
f"{fx_cube.var_name} cubes do not match. "
"Cannot broadcast cubes.") from exc
ancillary_var = iris.coords.AncillaryVariable(
fx_data,
standard_name=fx_cube.standard_name,
units=fx_cube.units,
var_name=fx_cube.var_name,
attributes=fx_cube.attributes)
cube.add_ancillary_variable(ancillary_var, range(0, ancillary_var.ndim))
logger.debug('Added %s as ancillary variable in cube of %s.',
fx_cube.var_name, cube.var_name)
def _psf(**kw):
args = OmegaConf.create(kw)
from omegaconf import ListConfig
if not isinstance(args.ms, list) and not isinstance(args.ms, ListConfig):
args.ms = [args.ms]
OmegaConf.set_struct(args, True)
import numpy as np
from pfb.utils.misc import chan_to_band_mapping
import dask
# from dask.distributed import performance_report
from dask.graph_manipulation import clone
from daskms import xds_from_storage_ms as xds_from_ms
from daskms import xds_from_storage_table as xds_from_table
from daskms import Dataset
from daskms.experimental.zarr import xds_to_zarr
import dask.array as da
from africanus.constants import c as lightspeed
from africanus.gridding.wgridder.dask import dirty as vis2im
from ducc0.fft import good_size
from pfb.utils.misc import stitch_images, plan_row_chunk
from pfb.utils.fits import set_wcs, save_fits
# chan <-> band mapping
ms = args.ms
nband = args.nband
freqs, freq_bin_idx, freq_bin_counts, freq_out, band_mapping, chan_chunks = chan_to_band_mapping(
ms, nband=nband)
# gridder memory budget
max_chan_chunk = 0
max_freq = 0
for ims in args.ms:
for spw in freqs[ims]:
counts = freq_bin_counts[ims][spw].compute()
freq = freqs[ims][spw].compute()
max_chan_chunk = np.maximum(max_chan_chunk, counts.max())
max_freq = np.maximum(max_freq, freq.max())
# assumes measurement sets have the same columns,
# number of correlations etc.
xds = xds_from_ms(args.ms[0])
ncorr = xds[0].dims['corr']
nrow = xds[0].dims['row']
# we still have to cater for complex valued data because we cast
# the weights to complex but we not longer need to factor the
# weight column into our memory budget
data_bytes = getattr(xds[0], args.data_column).data.itemsize
bytes_per_row = max_chan_chunk * ncorr * data_bytes
memory_per_row = bytes_per_row
# flags (uint8 or bool)
memory_per_row += bytes_per_row / 8
# UVW
memory_per_row += xds[0].UVW.data.itemsize * 3
# ANTENNA1/2
memory_per_row += xds[0].ANTENNA1.data.itemsize * 2
# TIME
memory_per_row += xds[0].TIME.data.itemsize
# data column is not actually read into memory just used to infer
# dtype and chunking
columns = (args.data_column, args.weight_column, args.flag_column, 'UVW',
'ANTENNA1', 'ANTENNA2', 'TIME')
# flag row
if 'FLAG_ROW' in xds[0]:
columns += ('FLAG_ROW', )
memory_per_row += xds[0].FLAG_ROW.data.itemsize
# imaging weights
if args.imaging_weight_column is not None:
columns += (args.imaging_weight_column, )
memory_per_row += bytes_per_row / 2
# Mueller term (complex valued)
if args.mueller_column is not None:
columns += (args.mueller_column, )
memory_per_row += bytes_per_row
# get max uv coords over all fields
uvw = []
u_max = 0.0
v_max = 0.0
for ims in args.ms:
xds = xds_from_ms(ims, columns=('UVW'), chunks={'row': -1})
for ds in xds:
uvw = ds.UVW.data
u_max = da.maximum(u_max, abs(uvw[:, 0]).max())
v_max = da.maximum(v_max, abs(uvw[:, 1]).max())
uv_max = da.maximum(u_max, v_max)
uv_max = uv_max.compute()
del uvw
# image size
cell_N = 1.0 / (2 * uv_max * max_freq / lightspeed)
if args.cell_size is not None:
cell_size = args.cell_size
cell_rad = cell_size * np.pi / 60 / 60 / 180
if cell_N / cell_rad < 1:
raise ValueError(
"Requested cell size too small. "
"Super resolution factor = ", cell_N / cell_rad)
print("Super resolution factor = %f" % (cell_N / cell_rad), file=log)
else:
cell_rad = cell_N / args.super_resolution_factor
cell_size = cell_rad * 60 * 60 * 180 / np.pi
print("Cell size set to %5.5e arcseconds" % cell_size, file=log)
if args.nx is None:
fov = args.field_of_view * 3600
npix = int(args.psf_oversize * fov / cell_size)
if npix % 2:
npix += 1
nx = npix
ny = npix
else:
nx = args.nx
ny = args.ny if args.ny is not None else nx
print("PSF size set to (%i, %i, %i)" % (nband, nx, ny), file=log)
# get approx image size
# this is not a conservative estimate when multiple SPW's map to a single
# imaging band
pixel_bytes = np.dtype(args.output_type).itemsize
band_size = nx * ny * pixel_bytes
if args.host_address is None:
# full image on single node
row_chunk = plan_row_chunk(args.mem_limit / args.nworkers, band_size,
nrow, memory_per_row,
args.nthreads_per_worker)
else:
# single band per node
row_chunk = plan_row_chunk(args.mem_limit, band_size, nrow,
memory_per_row, args.nthreads_per_worker)
if args.row_chunks is not None:
row_chunk = int(args.row_chunks)
if row_chunk == -1:
row_chunk = nrow
print(
"nrows = %i, row chunks set to %i for a total of %i chunks per node" %
(nrow, row_chunk, int(np.ceil(nrow / row_chunk))),
file=log)
chunks = {}
for ims in args.ms:
chunks[ims] = [] # xds_from_ms expects a list per ds
for spw in freqs[ims]:
chunks[ims].append({
'row': row_chunk,
'chan': chan_chunks[ims][spw]['chan']
})
psfs = []
radec = None # assumes we are only imaging field 0 of first MS
out_datasets = []
for ims in args.ms:
xds = xds_from_ms(ims, chunks=chunks[ims], columns=columns)
# subtables
ddids = xds_from_table(ims + "::DATA_DESCRIPTION")
fields = xds_from_table(ims + "::FIELD")
spws = xds_from_table(ims + "::SPECTRAL_WINDOW")
pols = xds_from_table(ims + "::POLARIZATION")
# subtable data
ddids = dask.compute(ddids)[0]
fields = dask.compute(fields)[0]
spws = dask.compute(spws)[0]
pols = dask.compute(pols)[0]
for ds in xds:
field = fields[ds.FIELD_ID]
# check fields match
if radec is None:
radec = field.PHASE_DIR.data.squeeze()
if not np.array_equal(radec, field.PHASE_DIR.data.squeeze()):
continue
# this is not correct, need to use spw
spw = ds.DATA_DESC_ID
uvw = clone(ds.UVW.data)
data_type = getattr(ds, args.data_column).data.dtype
data_shape = getattr(ds, args.data_column).data.shape
data_chunks = getattr(ds, args.data_column).data.chunks
weights = getattr(ds, args.weight_column).data
if len(weights.shape) < 3:
weights = da.broadcast_to(weights[:, None, :],
data_shape,
chunks=data_chunks)
if args.imaging_weight_column is not None:
imaging_weights = getattr(ds, args.imaging_weight_column).data
if len(imaging_weights.shape) < 3:
imaging_weights = da.broadcast_to(imaging_weights[:,
None, :],
data_shape,
chunks=data_chunks)
weightsxx = imaging_weights[:, :, 0] * weights[:, :, 0]
weightsyy = imaging_weights[:, :, -1] * weights[:, :, -1]
else:
weightsxx = weights[:, :, 0]
weightsyy = weights[:, :, -1]
# apply mueller term
if args.mueller_column is not None:
mueller = getattr(ds, args.mueller_column).data
weightsxx *= da.absolute(mueller[:, :, 0])**2
weightsyy *= da.absolute(mueller[:, :, -1])**2
# weighted sum corr to Stokes I
weights = weightsxx + weightsyy
# MS may contain auto-correlations
if 'FLAG_ROW' in xds[0]:
frow = ds.FLAG_ROW.data | (ds.ANTENNA1.data
== ds.ANTENNA2.data)
else:
frow = (ds.ANTENNA1.data == ds.ANTENNA2.data)
# only keep data where both corrs are unflagged
flag = getattr(ds, args.flag_column).data
flagxx = flag[:, :, 0]
flagyy = flag[:, :, -1]
# ducc0 uses uint8 mask not flag
mask = ~da.logical_or((flagxx | flagyy), frow[:, None])
psf = vis2im(uvw,
freqs[ims][spw],
weights.astype(data_type),
freq_bin_idx[ims][spw],
freq_bin_counts[ims][spw],
nx,
ny,
cell_rad,
flag=mask.astype(np.uint8),
nthreads=args.nvthreads,
epsilon=args.epsilon,
do_wstacking=args.wstack,
double_accum=args.double_accum)
psfs.append(psf)
data_vars = {
'FIELD_ID': (('row', ),
da.full_like(ds.TIME.data,
ds.FIELD_ID,
chunks=args.row_out_chunk)),
'DATA_DESC_ID': (('row', ),
da.full_like(ds.TIME.data,
ds.DATA_DESC_ID,
chunks=args.row_out_chunk)),
'WEIGHT':
(('row', 'chan'), weights.rechunk({0: args.row_out_chunk
})), # why no 'f4'?
'UVW': (('row', 'uvw'), uvw.rechunk({0: args.row_out_chunk}))
}
coords = {'chan': (('chan', ), freqs[ims][spw])}
out_ds = Dataset(data_vars, coords)
out_datasets.append(out_ds)
writes = xds_to_zarr(out_datasets,
args.output_filename + '.zarr',
columns='ALL')
# dask.visualize(writes, filename=args.output_filename + '_psf_writes_graph.pdf', optimize_graph=False)
# dask.visualize(psfs, filename=args.output_filename + '_psf_graph.pdf', optimize_graph=False)
if not args.mock:
# psfs = dask.compute(psfs, writes, optimize_graph=False)[0]
# with performance_report(filename=args.output_filename + '_psf_per.html'):
psfs = dask.compute(psfs, writes, optimize_graph=False)[0]
psf = stitch_images(psfs, nband, band_mapping)
hdr = set_wcs(cell_size / 3600, cell_size / 3600, nx, ny, radec,
freq_out)
save_fits(args.output_filename + '_psf.fits',
psf,
hdr,
dtype=args.output_type)
psf_mfs = np.sum(psf, axis=0)
wsum = psf_mfs.max()
psf_mfs /= wsum
hdr_mfs = set_wcs(cell_size / 3600, cell_size / 3600, nx, ny, radec,
np.mean(freq_out))
save_fits(args.output_filename + '_psf_mfs.fits',
psf_mfs,
hdr_mfs,
dtype=args.output_type)
print("All done here.", file=log)
def get_plot_data(msinfo, group_cols, mytaql, chan_freqs,
chanslice, subset,
noflags, noconj,
iter_field, iter_spw, iter_scan,
join_corrs=False,
row_chunk_size=100000):
ms_cols = {'ANTENNA1', 'ANTENNA2'}
if not noflags:
ms_cols.update({'FLAG', 'FLAG_ROW'})
# get visibility columns
for axis in DataAxis.all_axes.values():
ms_cols.update(axis.columns)
# get MS data
msdata = daskms.xds_from_ms(msinfo.msname, columns=list(ms_cols), group_cols=group_cols, taql_where=mytaql,
chunks=dict(row=row_chunk_size))
log.info(f': Indexing MS and building dataframes (chunk size is {row_chunk_size})')
np = 0 # number of points to plot
# output dataframes, indexed by (field, spw, scan, antenna, correlation)
# If any of these axes is not being iterated over, then the index is None
output_dataframes = OrderedDict()
# # make prototype dataframe
# import pandas
#
#
# iterate over groups
for group in msdata:
ddid = group.DATA_DESC_ID # always present
fld = group.FIELD_ID # always present
if fld not in subset.field or ddid not in subset.spw:
log.debug(f"field {fld} ddid {ddid} not in selection, skipping")
continue
scan = getattr(group, 'SCAN_NUMBER', None) # will be present if iterating over scans
# TODO: antenna iteration. None forces no iteration, for now
antenna = None
# always read flags -- easier that way
flag = group.FLAG if not noflags else None
flag_row = group.FLAG_ROW if not noflags else None
baselines = group.ANTENNA1*len(msinfo.antenna) + group.ANTENNA2
freqs = chan_freqs[ddid]
chans = xarray.DataArray(range(len(freqs)), dims=("chan",))
wavel = freq_to_wavel(freqs)
extras = dict(chans=chans, freqs=freqs, wavel=wavel, rows=group.row, baselines=baselines)
nchan = len(group.chan)
if flag is not None:
flag = flag[dict(chan=chanslice)]
nchan = flag.shape[1]
shape = (len(group.row), nchan)
datums = OrderedDict()
for corr in subset.corr.numbers:
# make dictionary of extra values for DataMappers
extras['corr'] = corr
# loop over datums to be computed
for axis in DataAxis.all_axes.values():
value = datums[axis.label][-1] if axis.label in datums else None
# a datum was already computed?
if value is not None:
# if not joining correlations, then that's the only one we'll need, so continue
if not join_corrs:
continue
# joining correlations, and datum has a correlation dependence: compute another one
if axis.corr is None:
value = None
if value is None:
value = axis.get_value(group, corr, extras, flag=flag, flag_row=flag_row, chanslice=chanslice)
# reshape values of shape NTIME to (NTIME,1) and NFREQ to (1,NFREQ), and scalar to (NTIME,1)
if value.ndim == 1:
timefreq_axis = axis.mapper.axis or 0
assert value.shape[0] == shape[timefreq_axis], \
f"{axis.mapper.fullname}: size {value.shape[0]}, expected {shape[timefreq_axis]}"
shape1 = [1,1]
shape1[timefreq_axis] = value.shape[0]
value = value.reshape(shape1)
if timefreq_axis > 0:
value = da.broadcast_to(value, shape)
log.debug(f"axis {axis.mapper.fullname} has shape {value.shape}")
# else 2D value better match expected shape
else:
assert value.shape == shape, f"{axis.mapper.fullname}: shape {value.shape}, expected {shape}"
datums.setdefault(axis.label, []).append(value)
# if joining correlations, stick all elements together. Otherwise, we'd better have one per label
if join_corrs:
datums = OrderedDict({label: da.concatenate(arrs) for label, arrs in datums.items()})
else:
assert all([len(arrs) == 1 for arrs in datums.values()])
datums = OrderedDict({label: arrs[0] for label, arrs in datums.items()})
# broadcast to same shape, and unravel all datums
datums = OrderedDict({ key: arr.ravel() for key, arr in zip(datums.keys(),
da.broadcast_arrays(*datums.values()))})
# if any axis needs to be conjugated, double up all of them
if not noconj and any([axis.conjugate for axis in DataAxis.all_axes.values()]):
for axis in DataAxis.all_axes.values():
if axis.conjugate:
datums[axis.label] = da.concatenate([datums[axis.label], -datums[axis.label]])
else:
datums[axis.label] = da.concatenate([datums[axis.label], datums[axis.label]])
labels, values = list(datums.keys()), list(datums.values())
np += values[0].size
# now stack them all into a big dataframe
rectype = [(axis.label, numpy.int32 if axis.nlevels else numpy.float32) for axis in DataAxis.all_axes.values()]
recarr = da.empty_like(values[0], dtype=rectype)
ddf = dask_df.from_array(recarr)
for label, value in zip(labels, values):
ddf[label] = value
# now, are we iterating or concatenating? Make frame key accordingly
dataframe_key = (fld if iter_field else None,
ddid if iter_spw else None,
scan if iter_scan else None,
antenna)
# do we already have a frame for this key
ddf0 = output_dataframes.get(dataframe_key)
if ddf0 is None:
log.debug(f"first frame for {dataframe_key}")
output_dataframes[dataframe_key] = ddf
else:
log.debug(f"appending to frame for {dataframe_key}")
output_dataframes[dataframe_key] = ddf0.append(ddf)
# convert discrete axes into categoricals
if data_mappers.USE_COUNT_CAT:
categorical_axes = [axis.label for axis in DataAxis.all_axes.values() if axis.nlevels]
if categorical_axes:
log.info(": counting colours")
for key, ddf in list(output_dataframes.items()):
output_dataframes[key] = ddf.categorize(categorical_axes)
log.info(": complete")
return output_dataframes, np
def extract_shape(cube,
shapefile,
method='contains',
crop=True,
decomposed=False):
"""
Extract a region defined by a shapefile.
Note that this function does not work for shapes crossing the
prime meridian or poles.
Parameters
----------
cube: iris.cube.Cube
input cube.
shapefile: str
A shapefile defining the region(s) to extract.
method: str, optional
Select all points contained by the shape or select a single
representative point. Choose either 'contains' or 'representative'.
If 'contains' is used, but not a single grid point is contained by the
shape, a representative point will selected.
crop: bool, optional
Crop the resulting cube using `extract_region()`. Note that data on
irregular grids will not be cropped.
decomposed: bool, optional
Whether or not to retain the sub shapes of the shapefile in the output.
If this is set to True, the output cube has a dimension for the sub
shapes.
Returns
-------
iris.cube.Cube
Cube containing the extracted region.
See Also
--------
extract_region : Extract a region from a cube.
"""
with fiona.open(shapefile) as geometries:
# get parameters specific to the shapefile (NE used case
# eg longitudes [-180, 180] or latitude missing
# or overflowing edges)
cmor_coords = True
pad_north_pole = False
pad_hawaii = False
if geometries.bounds[0] < 0:
cmor_coords = False
if geometries.bounds[1] > -90. and geometries.bounds[1] < -85.:
pad_north_pole = True
if geometries.bounds[0] > -180. and geometries.bounds[0] < 179.:
pad_hawaii = True
if crop:
cube = _crop_cube(cube,
*geometries.bounds,
cmor_coords=cmor_coords)
lon, lat = _correct_coords_from_shapefile(cube, cmor_coords,
pad_north_pole, pad_hawaii)
selections = _get_masks_from_geometries(geometries,
lon,
lat,
method=method,
decomposed=decomposed)
cubelist = iris.cube.CubeList()
for id_, select in selections.items():
_cube = cube.copy()
_cube.add_aux_coord(
iris.coords.AuxCoord(id_, units='no_unit', long_name="shape_id"))
select = da.broadcast_to(select, _cube.shape)
_cube.data = da.ma.masked_where(~select, _cube.core_data())
cubelist.append(_cube)
cube = cubelist.merge_cube()
return fix_coordinate_ordering(cube)
def extract_region(cube, start_longitude, end_longitude, start_latitude,
end_latitude):
"""
Extract a region from a cube.
Function that subsets a cube on a box (start_longitude, end_longitude,
start_latitude, end_latitude)
This function is a restriction of masked_cube_lonlat().
Parameters
----------
cube: iris.cube.Cube
input data cube.
start_longitude: float
Western boundary longitude.
end_longitude: float
Eastern boundary longitude.
start_latitude: float
Southern Boundary latitude.
end_latitude: float
Northern Boundary Latitude.
Returns
-------
iris.cube.Cube
smaller cube.
"""
if abs(start_latitude) > 90.:
raise ValueError(f"Invalid start_latitude: {start_latitude}")
if abs(end_latitude) > 90.:
raise ValueError(f"Invalid end_latitude: {end_latitude}")
if cube.coord('latitude').ndim == 1:
# Iris check if any point of the cell is inside the region
# To check only the center, ignore_bounds must be set to
# True (default) is False
region_subset = cube.intersection(
longitude=(start_longitude, end_longitude),
latitude=(start_latitude, end_latitude),
ignore_bounds=True,
)
region_subset = region_subset.intersection(longitude=(0., 360.))
return region_subset
# Irregular grids
lats = cube.coord('latitude').points
lons = cube.coord('longitude').points
# Convert longitudes to valid range
if start_longitude != 360.:
start_longitude %= 360.
if end_longitude != 360.:
end_longitude %= 360.
if start_longitude <= end_longitude:
select_lons = (lons >= start_longitude) & (lons <= end_longitude)
else:
select_lons = (lons >= start_longitude) | (lons <= end_longitude)
if start_latitude <= end_latitude:
select_lats = (lats >= start_latitude) & (lats <= end_latitude)
else:
select_lats = (lats >= start_latitude) | (lats <= end_latitude)
selection = select_lats & select_lons
selection = da.broadcast_to(selection, cube.shape)
cube.data = da.ma.masked_where(~selection, cube.core_data())
return cube
def broadcast_signals(*args, ignore_axis=None):
"""Broadcasts all passed signals according to the HyperSpy broadcasting
rules: signal and navigation spaces are each separately broadcasted
according to the numpy broadcasting rules. One axis can be ignored and
left untouched (or set to be size 1) across all signals.
Parameters
----------
*args : BaseSignal
Signals to broadcast together
ignore_axis : {None, str, int, Axis}
The axis to be ignored when broadcasting
Returns
-------
list of signals
"""
if len(args) < 2:
raise ValueError(
"This function requires at least two signal instances")
args = list(args)
if not are_signals_aligned(*args, ignore_axis=ignore_axis):
raise ValueError("The signals cannot be broadcasted")
else:
if ignore_axis is not None:
for s in args:
try:
ignore_axis = s.axes_manager[ignore_axis]
break
except ValueError:
pass
new_nav_axes = []
new_nav_shapes = []
for axes in zip_longest(*[s.axes_manager.navigation_axes
for s in args], fillvalue=None):
only_left = filter(lambda x: x is not None, axes)
longest = sorted(only_left, key=lambda x: x.size, reverse=True)[0]
new_nav_axes.append(longest)
new_nav_shapes.append(longest.size if (ignore_axis is None or
ignore_axis not in
axes)
else None)
new_sig_axes = []
new_sig_shapes = []
for axes in zip_longest(*[s.axes_manager.signal_axes
for s in args], fillvalue=None):
only_left = filter(lambda x: x is not None, axes)
longest = sorted(only_left, key=lambda x: x.size, reverse=True)[0]
new_sig_axes.append(longest)
new_sig_shapes.append(longest.size if (ignore_axis is None or
ignore_axis not in
axes)
else None)
results = []
new_axes = new_nav_axes[::-1] + new_sig_axes[::-1]
new_data_shape = new_nav_shapes[::-1] + new_sig_shapes[::-1]
for s in args:
data = s._data_aligned_with_axes
sam = s.axes_manager
sdim_diff = len(new_sig_axes) - sam.signal_dimension
while sdim_diff > 0:
slices = (slice(None),) * sam.navigation_dimension
slices += (None, Ellipsis)
data = data[slices]
sdim_diff -= 1
thisshape = new_data_shape.copy()
if ignore_axis is not None:
_id = new_data_shape.index(None)
newlen = data.shape[_id] if len(data.shape) > _id else 1
thisshape[_id] = newlen
thisshape = tuple(thisshape)
if data.shape != thisshape:
if isinstance(data, np.ndarray):
data = np.broadcast_to(data, thisshape)
else:
data = da.broadcast_to(data, thisshape)
ns = s._deepcopy_with_new_data(data)
ns.axes_manager._axes = [ax.copy() for ax in new_axes]
ns.get_dimensions_from_data()
results.append(ns.transpose(signal_axes=len(new_sig_axes)))
return results
def make_psf(self):
print("Making PSF")
psfs = []
for ims in self.ms:
xds = xds_from_ms(ims, group_cols=('FIELD_ID', 'DATA_DESC_ID'),
chunks=self.chunks[ims],
columns=self.columns)
# subtables
ddids = xds_from_table(ims + "::DATA_DESCRIPTION")
fields = xds_from_table(ims + "::FIELD", group_cols="__row__")
spws = xds_from_table(ims + "::SPECTRAL_WINDOW", group_cols="__row__")
pols = xds_from_table(ims + "::POLARIZATION", group_cols="__row__")
# subtable data
ddids = dask.compute(ddids)[0]
fields = dask.compute(fields)[0]
spws = dask.compute(spws)[0]
pols = dask.compute(pols)[0]
for ds in xds:
field = fields[ds.FIELD_ID]
radec = field.PHASE_DIR.data.squeeze()
if not np.array_equal(radec, self.radec):
continue
spw = ds.DATA_DESC_ID # this is not correct, need to use spw
freq_bin_idx = self.freq_bin_idx[ims][spw]
freq_bin_counts = self.freq_bin_counts[ims][spw]
freq = self.freq[ims][spw]
uvw = ds.UVW.data
flag = getattr(ds, self.flag_column).data
weights = getattr(ds, self.weight_column).data
if len(weights.shape) < 3:
weights = da.broadcast_to(weights[:, None, :], flag.shape, chunks=flag.chunks)
if self.imaging_weight_column is not None:
imaging_weights = getattr(ds, self.imaging_weight_column).data
if len(imaging_weights.shape) < 3:
imaging_weights = da.broadcast_to(imaging_weights[:, None, :], data.shape, chunks=data.chunks)
weightsxx = imaging_weights[:, :, 0] * weights[:, :, 0]
weightsyy = imaging_weights[:, :, -1] * weights[:, :, -1]
else:
weightsxx = weights[:, :, 0]
weightsyy = weights[:, :, -1]
# weighted sum corr to Stokes I
weights = weightsxx + weightsyy
data = weights.astype(np.complex64)
# only keep data where both corrs are unflagged
flagxx = flag[:, :, 0]
flagyy = flag[:, :, -1]
flag = ~ (flagxx | flagyy) # ducc0 convention
psf = vis2im(uvw, freq, data, freq_bin_idx, freq_bin_counts,
2*self.nx, 2*self.ny, self.cell, flag=flag.astype(np.uint8),
nthreads=self.nthreads, epsilon=self.epsilon, do_wstacking=self.do_wstacking)
psfs.append(psf)
psfs = dask.compute(psfs)[0]
return accumulate_dirty(psfs, self.nband, self.band_mapping).astype(np.float64)
def __get_seasonal_means_with_ttest_stats_dask_lazy(
self,
data,
season_to_monthperiod=None,
start_year=-np.Inf,
end_year=np.Inf,
convert_monthly_accumulators_to_daily=False):
# mask the resulting fields
epsilon = 1.0e-5
mask = np.less_equal(np.abs(data[0, :, :] - self.missing_value),
epsilon)
print("data.shape = ", data.shape)
data_sel, times_sel = data, self.time
# select the interval of interest
if convert_monthly_accumulators_to_daily:
ndays = da.from_array(
np.array([
calendar.monthrange(d.year, d.month)[1] for d in times_sel
]), (100, ))
ndays = da.transpose(da.broadcast_to(
da.from_array(ndays, ndays.shape),
data_sel.shape[1:] + ndays.shape),
axes=(2, 0, 1))
data_sel = data_sel / ndays
year_month_to_index_arr = defaultdict(list)
for i, t in enumerate(times_sel):
year_month_to_index_arr[t.year, t.month].append(i)
# calculate monthly means
monthly_data = {}
for y in range(start_year, end_year + 1):
for m in range(1, 13):
aslice = slice(year_month_to_index_arr[y, m][0],
year_month_to_index_arr[y, m][-1] + 1)
print(aslice, data_sel.shape)
monthly_data[y, m] = data_sel[aslice, :, :].mean(axis=0)
result = OrderedDict()
for season, month_period in season_to_monthperiod.items():
assert isinstance(month_period, MonthPeriod)
seasonal_means = []
ndays_per_season = []
for p in month_period.get_season_periods(start_year=start_year,
end_year=end_year):
lmos = da.stack([
monthly_data[start.year, start.month]
for start in p.range("months")
])
ndays_per_month = np.array([
calendar.monthrange(start.year, start.month)[1]
for start in p.range("months")
])
ndays_per_month = da.from_array(ndays_per_month,
ndays_per_month.shape)
print(p)
print(lmos.shape, ndays_per_month.shape, ndays_per_month.sum())
seasonal_mean = da.tensordot(
lmos, ndays_per_month, axes=([
0,
], [
0,
])) / ndays_per_month.sum()
seasonal_means.append(seasonal_mean)
ndays_per_season.append(ndays_per_month.sum())
seasonal_means = da.stack(seasonal_means)
ndays_per_season = np.array(ndays_per_season)
ndays_per_season = da.from_array(ndays_per_season,
ndays_per_season.shape)
print(seasonal_means.shape, ndays_per_season.shape)
assert seasonal_means.shape[0] == ndays_per_season.shape[0]
clim_mean = da.tensordot(
seasonal_means, ndays_per_season, axes=([
0,
], [
0,
])) / ndays_per_season.sum()
clim_std = ((seasonal_means -
da.broadcast_to(clim_mean, seasonal_means.shape))**2 *
ndays_per_season[:, np.newaxis, np.newaxis]).sum(
axis=0) / ndays_per_season.sum()
clim_std = clim_std**0.5
result[season] = [clim_mean, clim_std, ndays_per_season.shape[0]]
return result, mask
def broadcast_signals(*args, ignore_axis=None):
"""Broadcasts all passed signals according to the HyperSpy broadcasting
rules: signal and navigation spaces are each separately broadcasted
according to the numpy broadcasting rules. One axis can be ignored and
left untouched (or set to be size 1) across all signals.
Parameters
----------
*args : BaseSignal
Signals to broadcast together
ignore_axis : {None, str, int, Axis}
The axis to be ignored when broadcasting
Returns
-------
list of signals
"""
if len(args) < 2:
raise ValueError(
"This function requires at least two signal instances")
args = list(args)
if not are_signals_aligned(*args):
raise ValueError("The signals cannot be broadcasted")
else:
if ignore_axis is not None:
for s in args:
try:
ignore_axis = s.axes_manager[ignore_axis]
break
except ValueError:
pass
new_nav_axes = []
new_nav_shapes = []
for axes in zip_longest(*[
s.axes_manager.navigation_axes for s in args
],
fillvalue=None):
only_left = filter(lambda x: x is not None, axes)
longest = sorted(only_left, key=lambda x: x.size, reverse=True)[0]
new_nav_axes.append(longest)
new_nav_shapes.append(longest.size if (
ignore_axis is None or ignore_axis not in axes) else None)
new_sig_axes = []
new_sig_shapes = []
for axes in zip_longest(*[s.axes_manager.signal_axes for s in args],
fillvalue=None):
only_left = filter(lambda x: x is not None, axes)
longest = sorted(only_left, key=lambda x: x.size, reverse=True)[0]
new_sig_axes.append(longest)
new_sig_shapes.append(longest.size if (
ignore_axis is None or ignore_axis not in axes) else None)
results = []
new_axes = new_nav_axes[::-1] + new_sig_axes[::-1]
new_data_shape = new_nav_shapes[::-1] + new_sig_shapes[::-1]
for s in args:
data = s._data_aligned_with_axes
sam = s.axes_manager
sdim_diff = len(new_sig_axes) - sam.signal_dimension
while sdim_diff > 0:
slices = (slice(None), ) * sam.navigation_dimension
slices += (None, Ellipsis)
data = data[slices]
sdim_diff -= 1
thisshape = new_data_shape.copy()
if ignore_axis is not None:
_id = new_data_shape.index(None)
newlen = data.shape[_id] if len(data.shape) > _id else 1
thisshape[_id] = newlen
thisshape = tuple(thisshape)
if data.shape != thisshape:
if isinstance(data, np.ndarray):
data = np.broadcast_to(data, thisshape)
else:
data = da.broadcast_to(data, thisshape)
ns = s._deepcopy_with_new_data(data)
ns.axes_manager._axes = [ax.copy() for ax in new_axes]
ns.get_dimensions_from_data()
results.append(ns.transpose(signal_axes=len(new_sig_axes)))
return results
def make_dirty(self):
print("Making dirty", file=log)
dirty = da.zeros((self.nband, self.nx, self.ny),
dtype=np.float32,
chunks=(1, self.nx, self.ny),
name=False)
dirties = []
for ims in self.ms:
xds = xds_from_ms(ims,
group_cols=('FIELD_ID', 'DATA_DESC_ID'),
chunks=self.chunks[ims],
columns=self.columns)
# subtables
ddids = xds_from_table(ims + "::DATA_DESCRIPTION")
fields = xds_from_table(ims + "::FIELD", group_cols="__row__")
spws = xds_from_table(ims + "::SPECTRAL_WINDOW",
group_cols="__row__")
pols = xds_from_table(ims + "::POLARIZATION", group_cols="__row__")
# subtable data
ddids = dask.compute(ddids)[0]
fields = dask.compute(fields)[0]
spws = dask.compute(spws)[0]
pols = dask.compute(pols)[0]
for ds in xds:
field = fields[ds.FIELD_ID]
radec = field.PHASE_DIR.data.squeeze()
if not np.array_equal(radec, self.radec):
continue
spw = ds.DATA_DESC_ID # this is not correct, need to use spw
freq_bin_idx = self.freq_bin_idx[ims][spw]
freq_bin_counts = self.freq_bin_counts[ims][spw]
freq = self.freq[ims][spw]
freq_chunk = freq_bin_counts[0].compute()
uvw = ds.UVW.data
data = getattr(ds, self.data_column).data
dataxx = data[:, :, 0]
datayy = data[:, :, -1]
weights = getattr(ds, self.weight_column).data
if len(weights.shape) < 3:
weights = da.broadcast_to(weights[:, None, :],
data.shape,
chunks=data.chunks)
if self.imaging_weight_column is not None:
imaging_weights = getattr(ds,
self.imaging_weight_column).data
if len(imaging_weights.shape) < 3:
imaging_weights = da.broadcast_to(
imaging_weights[:, None, :],
data.shape,
chunks=data.chunks)
weightsxx = imaging_weights[:, :, 0] * weights[:, :, 0]
weightsyy = imaging_weights[:, :, -1] * weights[:, :, -1]
else:
weightsxx = weights[:, :, 0]
weightsyy = weights[:, :, -1]
# apply adjoint of mueller term.
# Phases modify data amplitudes modify weights.
if self.mueller_column is not None:
mueller = getattr(ds, self.mueller_column).data
dataxx *= da.exp(-1j * da.angle(mueller[:, :, 0]))
datayy *= da.exp(-1j * da.angle(mueller[:, :, -1]))
weightsxx *= da.absolute(mueller[:, :, 0])
weightsyy *= da.absolute(mueller[:, :, -1])
# weighted sum corr to Stokes I
weights = weightsxx + weightsyy
data = (weightsxx * dataxx + weightsyy * datayy)
# TODO - turn off this stupid warning
data = da.where(weights, data / weights, 0.0j)
# only keep data where both corrs are unflagged
flag = getattr(ds, self.flag_column).data
flagxx = flag[:, :, 0]
flagyy = flag[:, :, -1]
# ducc0 convention uses uint8 mask not flag
flag = ~(flagxx | flagyy)
dirty = vis2im(uvw,
freq,
data,
freq_bin_idx,
freq_bin_counts,
self.nx,
self.ny,
self.cell,
weights=weights,
flag=flag.astype(np.uint8),
nthreads=self.nthreads,
epsilon=self.epsilon,
do_wstacking=self.do_wstacking,
double_accum=True)
dirties.append(dirty)
dirties = dask.compute(dirties, scheduler='single-threaded')[0]
return accumulate_dirty(dirties, self.nband,
self.band_mapping).astype(self.real_type)
def compute_weights(self, robust):
from pfb.utils.weighting import compute_counts, counts_to_weights
# compute counts
counts = []
for ims in self.ms:
xds = xds_from_ms(ims,
group_cols=('FIELD_ID', 'DATA_DESC_ID'),
chunks=self.chunks[ims],
columns=('UVW'))
# subtables
ddids = xds_from_table(ims + "::DATA_DESCRIPTION")
fields = xds_from_table(ims + "::FIELD", group_cols="__row__")
spws = xds_from_table(ims + "::SPECTRAL_WINDOW",
group_cols="__row__")
pols = xds_from_table(ims + "::POLARIZATION", group_cols="__row__")
# subtable data
ddids = dask.compute(ddids)[0]
fields = dask.compute(fields)[0]
spws = dask.compute(spws)[0]
pols = dask.compute(pols)[0]
for ds in xds:
field = fields[ds.FIELD_ID]
radec = field.PHASE_DIR.data.squeeze()
if not np.array_equal(radec, self.radec):
continue
spw = ds.DATA_DESC_ID # not optimal, need to use spw
freq_bin_idx = self.freq_bin_idx[ims][spw]
freq_bin_counts = self.freq_bin_counts[ims][spw]
freq = self.freq[ims][spw]
uvw = ds.UVW.data
count = compute_counts(uvw, freq, freq_bin_idx,
freq_bin_counts, self.nx, self.ny,
self.cell, self.cell, np.float32)
counts.append(count)
counts = dask.compute(counts)[0]
counts = accumulate_dirty(counts, self.nband, self.band_mapping)
counts = da.from_array(counts, chunks=(1, -1, -1))
# convert counts to weights
writes = []
for ims in self.ms:
xds = xds_from_ms(ims,
group_cols=('FIELD_ID', 'DATA_DESC_ID'),
chunks=self.chunks[ims],
columns=self.columns)
# subtables
ddids = xds_from_table(ims + "::DATA_DESCRIPTION")
fields = xds_from_table(ims + "::FIELD", group_cols="__row__")
spws = xds_from_table(ims + "::SPECTRAL_WINDOW",
group_cols="__row__")
pols = xds_from_table(ims + "::POLARIZATION", group_cols="__row__")
# subtable data
ddids = dask.compute(ddids)[0]
fields = dask.compute(fields)[0]
spws = dask.compute(spws)[0]
pols = dask.compute(pols)[0]
out_data = []
for ds in xds:
field = fields[ds.FIELD_ID]
radec = field.PHASE_DIR.data.squeeze()
if not np.array_equal(radec, self.radec):
continue
spw = ds.DATA_DESC_ID # this is not correct, need to use spw
freq_bin_idx = self.freq_bin_idx[ims][spw]
freq_bin_counts = self.freq_bin_counts[ims][spw]
freq = self.freq[ims][spw]
uvw = ds.UVW.data
weights = counts_to_weights(counts, uvw, freq, freq_bin_idx,
freq_bin_counts, self.nx, self.ny,
self.cell, self.cell, np.float32,
robust)
# hack to get shape and chunking info
data = getattr(ds, self.data_column).data
weights = da.broadcast_to(weights[:, :, None],
data.shape,
chunks=data.chunks)
out_ds = ds.assign(**{
self.imaging_weight_column: (("row", "chan", "corr"),
weights)
})
out_data.append(out_ds)
writes.append(
xds_to_table(out_data,
ims,
columns=[self.imaging_weight_column]))
dask.compute(writes)
def main():
args = parse_args()
dask.config.set(num_workers=args.workers)
# Lightweight open with no data - just to create telstate and identify the CBID
ds = TelstateDataSource.from_url(args.source,
upgrade_flags=False,
chunk_store=None)
# View the CBID, but not any specific stream
cbid = ds.capture_block_id
telstate = ds.telstate.root().view(cbid)
streams = get_streams(telstate, args.streams)
# Find all arrays in the selected streams, and also ensure we're not
# trying to write things back on top of an existing dataset.
arrays = {}
for stream_name in streams:
sts = view_capture_stream(telstate, cbid, stream_name)
try:
chunk_info = sts['chunk_info']
except KeyError as exc:
raise RuntimeError('Could not get chunk info for {!r}: {}'.format(
stream_name, exc))
for array_name, array_info in chunk_info.items():
if args.new_prefix is not None:
array_info[
'prefix'] = args.new_prefix + '-' + stream_name.replace(
'_', '-')
prefix = array_info['prefix']
path = os.path.join(args.dest, prefix)
if os.path.exists(path):
raise RuntimeError(
'Directory {!r} already exists'.format(path))
store = get_chunk_store(args.source, sts, array_name)
# Older files have dtype as an object that can't be encoded in msgpack
dtype = np.dtype(array_info['dtype'])
array_info['dtype'] = np.lib.format.dtype_to_descr(dtype)
arrays[(stream_name, array_name)] = Array(stream_name, array_name,
store, array_info)
# Apply DATA_LOST bits to the flags arrays. This is a less efficient approach than
# datasources.py, but much simpler.
for stream_name in streams:
flags_array = arrays.get((stream_name, 'flags'))
if not flags_array:
continue
sources = [stream_name]
sts = view_capture_stream(telstate, cbid, stream_name)
sources += sts['src_streams']
for src_stream in sources:
if src_stream not in streams:
continue
src_ts = view_capture_stream(telstate, cbid, src_stream)
for array_name in src_ts['chunk_info']:
if array_name == 'flags' and src_stream != stream_name:
# Upgraded flags completely replace the source stream's
# flags, rather than augmenting them. Thus, data lost in
# the source stream has no effect.
continue
lost_flags = arrays[(src_stream, array_name)].lost_flags
lost_flags = lost_flags.rechunk(
flags_array.data.chunks[:lost_flags.ndim])
# weights_channel doesn't have a baseline axis
while lost_flags.ndim < flags_array.data.ndim:
lost_flags = lost_flags[..., np.newaxis]
lost_flags = da.broadcast_to(lost_flags,
flags_array.data.shape,
chunks=flags_array.data.chunks)
flags_array.data |= lost_flags
# Apply the rechunking specs
for spec in args.spec:
key = (spec.stream, spec.array)
if key not in arrays:
raise RuntimeError('{}/{} is not a known array'.format(
spec.stream, spec.array))
arrays[key].data = arrays[key].data.rechunk({
0: spec.time,
1: spec.freq
})
# Write out the new data
dest_store = NpyFileChunkStore(args.dest)
stores = []
for array in arrays.values():
full_name = dest_store.join(array.chunk_info['prefix'],
array.array_name)
dest_store.create_array(full_name)
stores.append(dest_store.put_dask_array(full_name, array.data))
array.chunk_info['chunks'] = array.data.chunks
stores = da.compute(*stores)
# put_dask_array returns an array with an exception object per chunk
for result_set in stores:
for result in result_set.flat:
if result is not None:
raise result
# Fix up chunk_info for new chunking
for stream_name in streams:
sts = view_capture_stream(telstate, cbid, stream_name)
chunk_info = sts['chunk_info']
for array_name in chunk_info.keys():
chunk_info[array_name] = arrays[(stream_name,
array_name)].chunk_info
sts.wrapped.delete('chunk_info')
sts.wrapped['chunk_info'] = chunk_info
# s3_endpoint_url is for the old version of the data
sts.wrapped.delete('s3_endpoint_url')
if args.s3_endpoint_url is not None:
sts.wrapped['s3_endpoint_url'] = args.s3_endpoint_url
# Write updated RDB file
url_parts = urllib.parse.urlparse(args.source, scheme='file')
dest_file = os.path.join(args.dest, args.new_prefix or cbid,
os.path.basename(url_parts.path))
os.makedirs(os.path.dirname(dest_file), exist_ok=True)
with RDBWriter(dest_file) as writer:
writer.save(telstate.backend)
def calculate_corners(center_lat, center_lon):
"""Calculate corner coordinates by averaging neighbor cells
"""
# get rank
rank = len(center_lat.dims)
if rank == 1:
# get dimensions
nlon = center_lon.size
nlat = center_lat.size
# convert center points from 1d to 2d
center_lat2d = da.broadcast_to(center_lat.values[None, :],
(nlon, nlat))
center_lon2d = da.broadcast_to(center_lon.values[:, None],
(nlon, nlat))
elif rank == 2:
# get dimensions
dims = center_lon.shape
nlon = dims[0]
nlat = dims[1]
# just rename and convert to dask array
center_lat2d = da.from_array(center_lat)
center_lon2d = da.from_array(center_lon)
else:
print(
'Unrecognized grid! The rank of coordinate variables can be 1 or 2 but it is {}.'
.format(rank))
sys.exit(2)
# calculate corner coordinates for latitude, counterclockwise order, imposing Fortran ordering
center_lat2d_ext = da.from_array(
np.pad(center_lat2d.compute(), (1, 1),
mode='reflect',
reflect_type='odd'))
ur = (center_lat2d_ext[1:-1, 1:-1] + center_lat2d_ext[0:-2, 1:-1] +
center_lat2d_ext[1:-1, 2:] + center_lat2d_ext[0:-2, 2:]) / 4.0
ul = (center_lat2d_ext[1:-1, 1:-1] + center_lat2d_ext[0:-2, 1:-1] +
center_lat2d_ext[1:-1, 0:-2] + center_lat2d_ext[0:-2, 0:-2]) / 4.0
ll = (center_lat2d_ext[1:-1, 1:-1] + center_lat2d_ext[1:-1, 0:-2] +
center_lat2d_ext[2:, 1:-1] + center_lat2d_ext[2:, 0:-2]) / 4.0
lr = (center_lat2d_ext[1:-1, 1:-1] + center_lat2d_ext[1:-1, 2:] +
center_lat2d_ext[2:, 1:-1] + center_lat2d_ext[2:, 2:]) / 4.0
# this looks clockwise ordering but it is transposed and becomes counterclockwise, bit-to-bit with NCL
corner_lat = da.stack([
ul.T.reshape((-1, )).T,
ll.T.reshape((-1, )).T,
lr.T.reshape((-1, )).T,
ur.T.reshape((-1, )).T
],
axis=1)
# calculate corner coordinates for longitude, counterclockwise order, imposing Fortran ordering
center_lon2d_ext = da.from_array(
np.pad(center_lon2d.compute(), (1, 1),
mode='reflect',
reflect_type='odd'))
ur = (center_lon2d_ext[1:-1, 1:-1] + center_lon2d_ext[0:-2, 1:-1] +
center_lon2d_ext[1:-1, 2:] + center_lon2d_ext[0:-2, 2:]) / 4.0
ul = (center_lon2d_ext[1:-1, 1:-1] + center_lon2d_ext[0:-2, 1:-1] +
center_lon2d_ext[1:-1, 0:-2] + center_lon2d_ext[0:-2, 0:-2]) / 4.0
ll = (center_lon2d_ext[1:-1, 1:-1] + center_lon2d_ext[1:-1, 0:-2] +
center_lon2d_ext[2:, 1:-1] + center_lon2d_ext[2:, 0:-2]) / 4.0
lr = (center_lon2d_ext[1:-1, 1:-1] + center_lon2d_ext[1:-1, 2:] +
center_lon2d_ext[2:, 1:-1] + center_lon2d_ext[2:, 2:]) / 4.0
# this looks clockwise ordering but it is transposed and becomes counterclockwise, bit-to-bit with NCL
corner_lon = da.stack([
ul.T.reshape((-1, )).T,
ll.T.reshape((-1, )).T,
lr.T.reshape((-1, )).T,
ur.T.reshape((-1, )).T
],
axis=1)
return center_lat2d, center_lon2d, corner_lat, corner_lon
def make_residual(self, x):
# Note deprecated (does not support Jones terms)
print("Making residual", file=log)
x = da.from_array(x.astype(self.real_type),
chunks=(1, self.nx, self.ny),
name=False)
residuals = []
for ims in self.ms:
xds = xds_from_ms(ims,
group_cols=('FIELD_ID', 'DATA_DESC_ID'),
chunks=self.chunks[ims],
columns=self.columns)
# subtables
ddids = xds_from_table(ims + "::DATA_DESCRIPTION")
fields = xds_from_table(ims + "::FIELD", group_cols="__row__")
spws = xds_from_table(ims + "::SPECTRAL_WINDOW",
group_cols="__row__")
pols = xds_from_table(ims + "::POLARIZATION", group_cols="__row__")
# subtable data
ddids = dask.compute(ddids)[0]
fields = dask.compute(fields)[0]
spws = dask.compute(spws)[0]
pols = dask.compute(pols)[0]
for ds in xds:
field = fields[ds.FIELD_ID]
radec = field.PHASE_DIR.data.squeeze()
if not np.array_equal(radec, self.radec):
continue
spw = ds.DATA_DESC_ID # this is not correct, need to use spw
freq_bin_idx = self.freq_bin_idx[ims][spw]
freq_bin_counts = self.freq_bin_counts[ims][spw]
freq = self.freq[ims][spw]
uvw = ds.UVW.data
data = getattr(ds, self.data_column).data
dataxx = data[:, :, 0]
datayy = data[:, :, -1]
weights = getattr(ds, self.weight_column).data
if len(weights.shape) < 3:
weights = da.broadcast_to(weights[:, None, :],
data.shape,
chunks=data.chunks)
if self.imaging_weight_column is not None:
imaging_weights = getattr(ds,
self.imaging_weight_column).data
if len(imaging_weights.shape) < 3:
imaging_weights = da.broadcast_to(
imaging_weights[:, None, :],
data.shape,
chunks=data.chunks)
weightsxx = imaging_weights[:, :, 0] * weights[:, :, 0]
weightsyy = imaging_weights[:, :, -1] * weights[:, :, -1]
else:
weightsxx = weights[:, :, 0]
weightsyy = weights[:, :, -1]
# weighted sum corr to Stokes I
weights = weightsxx + weightsyy
data = (weightsxx * dataxx + weightsyy * datayy)
data = da.where(weights, data / weights, 0.0j)
# only keep data where both corrs are unflagged
flag = getattr(ds, self.flag_column).data
flagxx = flag[:, :, 0]
flagyy = flag[:, :, -1]
flag = ~(flagxx | flagyy) # ducc0 convention
bands = self.band_mapping[ims][spw]
model = x[list(bands), :, :]
residual = im2residim(uvw,
freq,
model,
data,
freq_bin_idx,
freq_bin_counts,
self.cell,
weights=weights,
flag=flag.astype(np.uint8),
nthreads=self.nthreads,
epsilon=self.epsilon,
do_wstacking=self.do_wstacking,
double_accum=True)
residuals.append(residual)
residuals = dask.compute(residuals)[0]
return accumulate_dirty(residuals, self.nband,
self.band_mapping).astype(self.real_type)
dz["st_ocean"] = depth["st_ocean"]
for var in line_tracer_vars:
ds_out[f"{var}_segment_001"] = ds_out[f"{var}_segment_001"].expand_dims(
"ny_segment_001", axis=1)
for var in surface_vars:
# add the y dimension
ds_out[f"{var}_segment_001"] = ds_out[f"{var}_segment_001"].expand_dims(
"ny_segment_001", axis=2)
ds_out[f"vc_{var}_segment_001"] = (
["time", f"nz_segment_001_{var}", "ny_segment_001", "nx_segment_001"],
da.broadcast_to(
depth.data[None, :, None, None],
ds_out[f"{var}_segment_001"].shape,
chunks=(1, None, None, None),
),
)
ds_out[f"dz_{var}_segment_001"] = (
["time", f"nz_segment_001_{var}", "ny_segment_001", "nx_segment_001"],
da.broadcast_to(
dz.data[None, :, None, None],
ds_out[f"{var}_segment_001"].shape,
chunks=(1, None, None, None),
),
)
with ProgressBar():
ds_out.to_netcdf("forcing_obc.nc")
def make_psf(self):
print("Making PSF", file=log)
psfs = []
self.stokes_weights = {}
self.uvws = {}
for ims in self.ms:
xds = xds_from_ms(ims,
group_cols=('FIELD_ID', 'DATA_DESC_ID'),
chunks=self.chunks[ims],
columns=self.columns)
# subtables
ddids = xds_from_table(ims + "::DATA_DESCRIPTION")
fields = xds_from_table(ims + "::FIELD", group_cols="__row__")
spws = xds_from_table(ims + "::SPECTRAL_WINDOW",
group_cols="__row__")
pols = xds_from_table(ims + "::POLARIZATION", group_cols="__row__")
# subtable data
ddids = dask.compute(ddids)[0]
fields = dask.compute(fields)[0]
spws = dask.compute(spws)[0]
pols = dask.compute(pols)[0]
self.stokes_weights[ims] = {}
self.uvws[ims] = {}
for ds in xds:
field = fields[ds.FIELD_ID]
radec = field.PHASE_DIR.data.squeeze()
if not np.array_equal(radec, self.radec):
continue
# this is not correct, need to use spw
spw = ds.DATA_DESC_ID
freq_bin_idx = self.freq_bin_idx[ims][spw]
freq_bin_counts = self.freq_bin_counts[ims][spw]
freq = self.freq[ims][spw]
uvw = ds.UVW.data
flag = getattr(ds, self.flag_column).data
weights = getattr(ds, self.weight_column).data
if len(weights.shape) < 3:
weights = da.broadcast_to(weights[:, None, :],
flag.shape,
chunks=flag.chunks)
if self.imaging_weight_column is not None:
imaging_weights = getattr(ds,
self.imaging_weight_column).data
if len(imaging_weights.shape) < 3:
imaging_weights = da.broadcast_to(
imaging_weights[:, None, :],
flag.shape,
chunks=flag.chunks)
weightsxx = imaging_weights[:, :, 0] * weights[:, :, 0]
weightsyy = imaging_weights[:, :, -1] * weights[:, :, -1]
else:
weightsxx = weights[:, :, 0]
weightsyy = weights[:, :, -1]
# for the PSF we need to scale the weights by the
# Mueller amplitudes squared
if self.mueller_column is not None:
mueller = getattr(ds, self.mueller_column).data
weightsxx *= da.absolute(mueller[:, :, 0])**2
weightsyy *= da.absolute(mueller[:, :, -1])**2
# weighted sum corr to Stokes I
weights = weightsxx + weightsyy
# only keep data where both corrs are unflagged
flagxx = flag[:, :, 0]
flagyy = flag[:, :, -1]
flag = ~(flagxx | flagyy) # ducc0 convention
weights *= flag
data = weights.astype(np.complex64)
psf = vis2im(uvw,
freq,
data,
freq_bin_idx,
freq_bin_counts,
self.nx_psf,
self.ny_psf,
self.cell,
flag=flag.astype(np.uint8),
nthreads=self.nthreads,
epsilon=self.epsilon,
do_wstacking=self.do_wstacking,
double_accum=True)
psfs.append(psf)
# assumes that stokes weights and uvw fit into memory
# self.stokes_weights[ims][spw] = dask.persist(weights.rechunk({0:-1}))[0]
# self.uvws[ims][spw] = dask.persist(uvw.rechunk({0:-1}))[0]
# for comparison with numpy implementation
# self.stokes_weights[ims][spw] = dask.compute(weights)[0]
# self.uvws[ims][spw] = dask.compute(uvw)[0]
# import pdb
# pdb.set_trace()
psfs = dask.compute(psfs, scheduler='single-threaded')[0]
return accumulate_dirty(psfs, self.nband,
self.band_mapping).astype(self.real_type)
def main(args):
"""
Flags outliers in data given a model and rescale weights so that whitened residuals have a
mean amplitude of sqrt(2).
Flags and weights are computed per chunk of data
"""
radec_ref = None
writes = []
for ims in args.ms:
xds = xds_from_ms(ims,
group_cols=('FIELD_ID', 'DATA_DESC_ID'),
chunks={
"row": args.row_chunks,
"chan": args.chan_chunks
},
columns=('UVW', args.data_column, args.weight_column,
args.model_column, args.flag_column,
'FLAG_ROW'))
# subtables
ddids = xds_from_table(ims + "::DATA_DESCRIPTION")
fields = xds_from_table(ims + "::FIELD", group_cols="__row__")
spws = xds_from_table(ims + "::SPECTRAL_WINDOW", group_cols="__row__")
pols = xds_from_table(ims + "::POLARIZATION", group_cols="__row__")
# subtable data
ddids = dask.compute(ddids)[0]
fields = dask.compute(fields)[0]
spws = dask.compute(spws)[0]
pols = dask.compute(pols)[0]
out_data = []
for ds in xds:
field = fields[ds.FIELD_ID]
radec = field.PHASE_DIR.data.squeeze()
# check fields match
if radec_ref is None:
radec_ref = radec
if not np.array_equal(radec, radec_ref):
continue
# load in data and compute whitened residuals
data = getattr(ds, args.data_column).data
model = getattr(ds, args.model_column).data
flag = getattr(ds, args.flag_column).data
flag = da.logical_or(flag, ds.FLAG_ROW.data[:, None, None])
weights = getattr(ds, args.weight_column).data
if len(weights.shape) < 3:
weights = da.broadcast_to(weights[:, None, :],
data.shape,
chunks=data.chunks)
if args.trim_channels:
flag = trim_chans(flag, args.trim_channels)
# Stokes I vis
weights = (~flag) * weights
resid_vis = (data - model) * weights
wsums = (weights[:, :, 0] + weights[:, :, -1])
resid_vis_I = da.where(
wsums, (resid_vis[:, :, 0] + resid_vis[:, :, -1]) / wsums,
0.0j)
# whiten and take abs
white_resid = resid_vis_I * da.sqrt(wsums)
abs_resid_vis_I = (white_resid).__abs__()
# mean amp
sum_amp = da.sum(abs_resid_vis_I)
count = da.sum(wsums > 0)
mean_amp = sum_amp / count
flag_legacy = flag[:, :, 0] | flag[:, :, -1]
flag_I = da.logical_or(abs_resid_vis_I > args.sigma_cut * mean_amp,
flag_legacy)
# new flags
updated_flag = da.broadcast_to(flag_I[:, :, None],
flag.shape,
chunks=flag.chunks)
# scale weights (whitened residuals should have mean amplitude of 1/sqrt(2))
if args.scale_weights:
# recompute mean amp with new flags
weights = (~updated_flag) * weights
resid_vis = (data - model) * weights
wsums = (weights[:, :, 0] + weights[:, :, -1])
resid_vis_I = da.where(
wsums, (resid_vis[:, :, 0] + resid_vis[:, :, -1]) / wsums,
0.0j)
white_resid = resid_vis_I * da.sqrt(wsums)
abs_resid_vis_I = (white_resid).__abs__()
sum_amp = da.sum(abs_resid_vis_I)
count = da.sum(wsums > 0)
mean_amp = sum_amp / count
updated_weight = 2**0.5 * weights / mean_amp**2
else:
updated_weight = weights
ds = ds.assign(**{
args.weight_out_column: (("row", "chan", "corr"),
updated_weight)
})
ds = ds.assign(**{
args.flag_out_column: (("row", "chan", "corr"), updated_flag)
})
out_data.append(ds)
writes.append(
xds_to_table(
out_data,
ims,
columns=[args.flag_out_column, args.weight_out_column]))
with ProgressBar():
dask.compute(writes)
# report new mean amp
if args.report_means:
radec_ref = None
mean_amps = []
for ims in args.ms:
xds = xds_from_ms(
ims,
group_cols=('FIELD_ID', 'DATA_DESC_ID'),
chunks={
"row": args.row_chunks,
"chan": args.chan_chunks
},
columns=('UVW', args.data_column, args.weight_out_column,
args.model_column, args.flag_out_column, 'FLAG_ROW'))
# subtables
ddids = xds_from_table(ims + "::DATA_DESCRIPTION")
fields = xds_from_table(ims + "::FIELD", group_cols="__row__")
spws = xds_from_table(ims + "::SPECTRAL_WINDOW",
group_cols="__row__")
pols = xds_from_table(ims + "::POLARIZATION", group_cols="__row__")
# subtable data
ddids = dask.compute(ddids)[0]
fields = dask.compute(fields)[0]
spws = dask.compute(spws)[0]
pols = dask.compute(pols)[0]
for ds in xds:
field = fields[ds.FIELD_ID]
radec = field.PHASE_DIR.data.squeeze()
# check fields match
if radec_ref is None:
radec_ref = radec
if not np.array_equal(radec, radec_ref):
continue
# load in data and compute whitened residuals
data = getattr(ds, args.data_column).data
model = getattr(ds, args.model_column).data
flag = getattr(ds, args.flag_out_column).data
flag = da.logical_or(flag, ds.FLAG_ROW.data[:, None, None])
weights = getattr(ds, args.weight_out_column).data
if len(weights.shape) < 3:
weights = da.broadcast_to(weights[:, None, :],
data.shape,
chunks=data.chunks)
# Stokes I vis
weights = (~flag) * weights
resid_vis = (data - model) * weights
wsums = (weights[:, :, 0] + weights[:, :, -1])
resid_vis_I = da.where(
wsums, (resid_vis[:, :, 0] + resid_vis[:, :, -1]) / wsums,
0.0j)
# whiten and take abs
white_resid = resid_vis_I * da.sqrt(wsums)
abs_resid_vis_I = (white_resid).__abs__()
# mean amp
sum_amp = da.sum(abs_resid_vis_I)
count = da.sum(wsums > 0)
mean_amps.append(sum_amp / count)
mean_amps = dask.compute(mean_amps)[0]
print(mean_amps)
def _main(args):
tic = time.time()
log.info(banner())
if args.disable_post_mortem:
log.warn("Disabling crash debugging with the "
"Interactive Python Debugger, as per user request")
post_mortem_handler.disable_pdb_on_error()
log.info("Flagging on the {0:s} column".format(args.data_column))
data_column = args.data_column
masked_channels = [
load_mask(fn, dilate=args.dilate_masks) for fn in collect_masks()
]
GD = args.config
log_configuration(args)
# Group datasets by these columns
group_cols = ["FIELD_ID", "DATA_DESC_ID", "SCAN_NUMBER"]
# Index datasets by these columns
index_cols = ['TIME']
# Reopen the datasets using the aggregated row ordering
columns = [data_column, "FLAG", "TIME", "ANTENNA1", "ANTENNA2"]
if args.subtract_model_column is not None:
columns.append(args.subtract_model_column)
xds = list(
xds_from_ms(args.ms,
columns=tuple(columns),
group_cols=group_cols,
index_cols=index_cols,
chunks={"row": args.row_chunks}))
# Get support tables
st = support_tables(args.ms)
ddid_ds = st["DATA_DESCRIPTION"]
field_ds = st["FIELD"]
pol_ds = st["POLARIZATION"]
spw_ds = st["SPECTRAL_WINDOW"]
ant_ds = st["ANTENNA"]
assert len(ant_ds) == 1
assert len(ddid_ds) == 1
antspos = ant_ds[0].POSITION.data
antsnames = ant_ds[0].NAME.data
fieldnames = [fds.NAME.data[0] for fds in field_ds]
avail_scans = [ds.SCAN_NUMBER for ds in xds]
args.scan_numbers = list(
set(avail_scans).intersection(args.scan_numbers if args.scan_numbers
is not None else avail_scans))
if args.scan_numbers != []:
log.info("Only considering scans '{0:s}' as "
"per user selection criterion".format(", ".join(
map(str, map(int, args.scan_numbers)))))
if args.field_names != []:
flatten_field_names = []
for f in args.field_names:
# accept comma lists per specification
flatten_field_names += [x.strip() for x in f.split(",")]
for f in flatten_field_names:
if re.match(r"^\d+$", f) and int(f) < len(fieldnames):
flatten_field_names.append(fieldnames[int(f)])
flatten_field_names = list(
set(
filter(lambda x: not re.match(r"^\d+$", x),
flatten_field_names)))
log.info("Only considering fields '{0:s}' for flagging per "
"user "
"selection criterion.".format(", ".join(flatten_field_names)))
if not set(flatten_field_names) <= set(fieldnames):
raise ValueError("One or more fields cannot be "
"found in dataset '{0:s}' "
"You specified {1:s}, but "
"only {2:s} are available".format(
args.ms, ",".join(flatten_field_names),
",".join(fieldnames)))
field_dict = {fieldnames.index(fn): fn for fn in flatten_field_names}
else:
field_dict = {i: fn for i, fn in enumerate(fieldnames)}
# List which hold our dask compute graphs for each dataset
write_computes = []
original_stats = []
final_stats = []
# Iterate through each dataset
for ds in xds:
if ds.FIELD_ID not in field_dict:
continue
if (args.scan_numbers is not None
and ds.SCAN_NUMBER not in args.scan_numbers):
continue
log.info("Adding field '{0:s}' scan {1:d} to "
"compute graph for processing".format(field_dict[ds.FIELD_ID],
ds.SCAN_NUMBER))
ddid = ddid_ds[ds.attrs['DATA_DESC_ID']]
spw_info = spw_ds[ddid.SPECTRAL_WINDOW_ID.data[0]]
pol_info = pol_ds[ddid.POLARIZATION_ID.data[0]]
nrow, nchan, ncorr = getattr(ds, data_column).data.shape
# Visibilities from the dataset
vis = getattr(ds, data_column).data
if args.subtract_model_column is not None:
log.info("Forming residual data between '{0:s}' and "
"'{1:s}' for flagging.".format(
data_column, args.subtract_model_column))
vismod = getattr(ds, args.subtract_model_column).data
vis = vis - vismod
antenna1 = ds.ANTENNA1.data
antenna2 = ds.ANTENNA2.data
chan_freq = spw_info.CHAN_FREQ.data[0]
chan_width = spw_info.CHAN_WIDTH.data[0]
# Generate unflagged defaults if we should ignore existing flags
# otherwise take flags from the dataset
if args.ignore_flags is True:
flags = da.full_like(vis, False, dtype=np.bool)
log.critical("Completely ignoring measurement set "
"flags as per '-if' request. "
"Strategy WILL NOT or with original flags, even if "
"specified!")
else:
flags = ds.FLAG.data
# If we're flagging on polarised intensity,
# we convert visibilities to polarised intensity
# and any flagged correlation will flag the entire visibility
if args.flagging_strategy == "polarisation":
corr_type = pol_info.CORR_TYPE.data[0].tolist()
stokes_map = stokes_corr_map(corr_type)
stokes_pol = tuple(v for k, v in stokes_map.items() if k != "I")
vis = polarised_intensity(vis, stokes_pol)
flags = da.any(flags, axis=2, keepdims=True)
elif args.flagging_strategy == "total_power":
if args.subtract_model_column is None:
log.critical("You requested to flag total quadrature "
"power, but not on residuals. "
"This is not advisable and the flagger "
"may mistake fringes of "
"off-axis sources for broadband RFI.")
corr_type = pol_info.CORR_TYPE.data[0].tolist()
stokes_map = stokes_corr_map(corr_type)
stokes_pol = tuple(v for k, v in stokes_map.items())
vis = polarised_intensity(vis, stokes_pol)
flags = da.any(flags, axis=2, keepdims=True)
elif args.flagging_strategy == "standard":
if args.subtract_model_column is None:
log.critical("You requested to flag per correlation, "
"but not on residuals. "
"This is not advisable and the flagger "
"may mistake fringes of off-axis sources "
"for broadband RFI.")
else:
raise ValueError("Invalid flagging strategy '%s'" %
args.flagging_strategy)
ubl = unique_baselines(antenna1, antenna2)
utime, time_inv = da.unique(ds.TIME.data, return_inverse=True)
utime, ubl = dask.compute(utime, ubl)
ubl = ubl.view(np.int32).reshape(-1, 2)
# Stack the baseline index with the unique baselines
bl_range = np.arange(ubl.shape[0], dtype=ubl.dtype)[:, None]
ubl = np.concatenate([bl_range, ubl], axis=1)
ubl = da.from_array(ubl, chunks=(args.baseline_chunks, 3))
vis_windows, flag_windows = pack_data(time_inv,
ubl,
antenna1,
antenna2,
vis,
flags,
utime.shape[0],
backend=args.window_backend,
path=args.temporary_directory)
original_stats.append(
window_stats(flag_windows, ubl, chan_freq, antsnames,
ds.SCAN_NUMBER, field_dict[ds.FIELD_ID],
ds.attrs['DATA_DESC_ID']))
with StrategyExecutor(antspos, ubl, chan_freq, chan_width,
masked_channels, GD['strategies']) as se:
flag_windows = se.apply_strategies(flag_windows, vis_windows)
final_stats.append(
window_stats(flag_windows, ubl, chan_freq, antsnames,
ds.SCAN_NUMBER, field_dict[ds.FIELD_ID],
ds.attrs['DATA_DESC_ID']))
# Unpack window data for writing back to the MS
unpacked_flags = unpack_data(antenna1, antenna2, time_inv, ubl,
flag_windows)
# Flag entire visibility if any correlations are flagged
equalized_flags = da.sum(unpacked_flags, axis=2, keepdims=True) > 0
corr_flags = da.broadcast_to(equalized_flags, (nrow, nchan, ncorr))
if corr_flags.chunks != ds.FLAG.data.chunks:
raise ValueError("Output flag chunking does not "
"match input flag chunking")
# Create new dataset containing new flags
new_ds = ds.assign(FLAG=(("row", "chan", "corr"), corr_flags))
# Write back to original dataset
writes = xds_to_table(new_ds, args.ms, "FLAG")
# original should also have .compute called because we need stats
write_computes.append(writes)
if len(write_computes) > 0:
# Combine stats from all datasets
original_stats = combine_window_stats(original_stats)
final_stats = combine_window_stats(final_stats)
with contextlib.ExitStack() as stack:
# Create dask profiling contexts
profilers = []
if can_profile:
profilers.append(stack.enter_context(Profiler()))
profilers.append(stack.enter_context(CacheProfiler()))
profilers.append(stack.enter_context(ResourceProfiler()))
if sys.stdout.isatty():
# Interactive terminal, default ProgressBar
stack.enter_context(ProgressBar())
else:
# Non-interactive, emit a bar every 5 minutes so
# as not to spam the log
stack.enter_context(ProgressBar(minimum=1, dt=5 * 60))
_, original_stats, final_stats = dask.compute(
write_computes, original_stats, final_stats)
if can_profile:
visualize(profilers)
toc = time.time()
# Log each summary line
for line in summarise_stats(final_stats, original_stats):
log.info(line)
elapsed = toc - tic
log.info("Data flagged successfully in "
"{0:02.0f}h{1:02.0f}m{2:02.0f}s".format((elapsed // 60) // 60,
(elapsed // 60) % 60,
elapsed % 60))
else:
log.info("User data selection criteria resulted in empty dataset. "
"Nothing to be done. Bye!")
def __call__(self, signal, out=None, axes=None):
"""Slice the signal according to the ROI, and return it.
Arguments
---------
signal : Signal
The signal to slice with the ROI.
out : Signal, default = None
If the 'out' argument is supplied, the sliced output will be put
into this instead of returning a Signal. See Signal.__getitem__()
for more details on 'out'.
axes : specification of axes to use, default = None
The axes argument specifies which axes the ROI will be applied on.
The items in the collection can be either of the following:
* a tuple of:
- DataAxis. These will not be checked with
signal.axes_manager.
- anything that will index signal.axes_manager
* For any other value, it will check whether the navigation
space can fit the right number of axis, and use that if it
fits. If not, it will try the signal space.
"""
if axes is None and signal in self.signal_map:
axes = self.signal_map[signal][1]
else:
axes = self._parse_axes(axes, signal.axes_manager)
natax = signal.axes_manager._get_axes_in_natural_order()
# Slice original data with a circumscribed rectangle
cx = self.cx + 0.5001 * axes[0].scale
cy = self.cy + 0.5001 * axes[1].scale
ranges = [[cx - self.r, cx + self.r],
[cy - self.r, cy + self.r]]
slices = self._make_slices(natax, axes, ranges)
ir = [slices[natax.index(axes[0])],
slices[natax.index(axes[1])]]
vx = axes[0].axis[ir[0]] - cx
vy = axes[1].axis[ir[1]] - cy
gx, gy = np.meshgrid(vx, vy)
gr = gx**2 + gy**2
mask = gr > self.r**2
if self.r_inner != t.Undefined:
mask |= gr < self.r_inner**2
tiles = []
shape = []
chunks = []
for i in range(len(slices)):
if signal._lazy:
chunks.append(signal.data.chunks[i][0])
if i == natax.index(axes[0]):
thisshape = mask.shape[0]
tiles.append(thisshape)
shape.append(thisshape)
elif i == natax.index(axes[1]):
thisshape = mask.shape[1]
tiles.append(thisshape)
shape.append(thisshape)
else:
tiles.append(signal.axes_manager._axes[i].size)
shape.append(1)
mask = mask.reshape(shape)
nav_axes = [ax.navigate for ax in axes]
nav_dim = signal.axes_manager.navigation_dimension
if True in nav_axes:
if False in nav_axes:
slicer = signal.inav[slices[:nav_dim]].isig.__getitem__
slices = slices[nav_dim:]
else:
slicer = signal.inav.__getitem__
slices = slices[0:nav_dim]
else:
slicer = signal.isig.__getitem__
slices = slices[nav_dim:]
roi = slicer(slices, out=out)
roi = out or roi
if roi._lazy:
import dask.array as da
mask = da.from_array(mask, chunks=chunks)
mask = da.broadcast_to(mask, tiles)
# By default promotes dtype to float if required
roi.data = da.where(mask, np.nan, roi.data)
else:
mask = np.broadcast_to(mask, tiles)
roi.data = np.ma.masked_array(roi.data, mask, hard_mask=True)
if out is None:
return roi
else:
out.events.data_changed.trigger(out)
def __call__(self, signal, out=None, axes=None):
"""Slice the signal according to the ROI, and return it.
Arguments
---------
signal : Signal
The signal to slice with the ROI.
out : Signal, default = None
If the 'out' argument is supplied, the sliced output will be put
into this instead of returning a Signal. See Signal.__getitem__()
for more details on 'out'.
axes : specification of axes to use, default = None
The axes argument specifies which axes the ROI will be applied on.
The items in the collection can be either of the following:
* a tuple of:
- DataAxis. These will not be checked with
signal.axes_manager.
- anything that will index signal.axes_manager
* For any other value, it will check whether the navigation
space can fit the right number of axis, and use that if it
fits. If not, it will try the signal space.
"""
if axes is None and signal in self.signal_map:
axes = self.signal_map[signal][1]
else:
axes = self._parse_axes(axes, signal.axes_manager)
natax = signal.axes_manager._get_axes_in_natural_order()
# Slice original data with a circumscribed rectangle
cx = self.cx + 0.5001 * axes[0].scale
cy = self.cy + 0.5001 * axes[1].scale
ranges = [[cx - self.r, cx + self.r], [cy - self.r, cy + self.r]]
slices = self._make_slices(natax, axes, ranges)
ir = [slices[natax.index(axes[0])], slices[natax.index(axes[1])]]
vx = axes[0].axis[ir[0]] - cx
vy = axes[1].axis[ir[1]] - cy
gx, gy = np.meshgrid(vx, vy)
gr = gx**2 + gy**2
mask = gr > self.r**2
if self.r_inner != t.Undefined:
mask |= gr < self.r_inner**2
tiles = []
shape = []
chunks = []
for i in range(len(slices)):
if signal._lazy:
chunks.append(signal.data.chunks[i][0])
if i == natax.index(axes[0]):
thisshape = mask.shape[0]
tiles.append(thisshape)
shape.append(thisshape)
elif i == natax.index(axes[1]):
thisshape = mask.shape[1]
tiles.append(thisshape)
shape.append(thisshape)
else:
tiles.append(signal.axes_manager._axes[i].size)
shape.append(1)
mask = mask.reshape(shape)
nav_axes = [ax.navigate for ax in axes]
nav_dim = signal.axes_manager.navigation_dimension
if True in nav_axes:
if False in nav_axes:
slicer = signal.inav[slices[:nav_dim]].isig.__getitem__
slices = slices[nav_dim:]
else:
slicer = signal.inav.__getitem__
slices = slices[0:nav_dim]
else:
slicer = signal.isig.__getitem__
slices = slices[nav_dim:]
roi = slicer(slices, out=out)
roi = out or roi
if roi._lazy:
import dask.array as da
mask = da.from_array(mask, chunks=chunks)
mask = da.broadcast_to(mask, tiles)
# By default promotes dtype to float if required
roi.data = da.where(mask, np.nan, roi.data)
else:
mask = np.broadcast_to(mask, tiles)
roi.data = np.ma.masked_array(roi.data, mask, hard_mask=True)
if out is None:
return roi
else:
out.events.data_changed.trigger(out)
def extract_rot_cube(cube, min_lat, min_lon, max_lat, max_lon):
"""
Function etracts the specific region from the cube.
args
----
cube: cube on rotated coord system, used as reference grid for transformation.
Returns
-------
min_lat: The minimum latitude point of the desired extracted cube.
min_lon: The minimum longitude point of the desired extracted cube.
max_lat: The maximum latitude point of the desired extracted cube.
max_lon: The maximum longitude point of the desired extracted cube.
An example:
>>> file = os.path.join(conf.DATA_DIR, 'rcm_monthly.pp')
>>> cube = iris.load_cube(file, 'air_temperature')
>>> min_lat = 50
>>> min_lon = -10
>>> max_lat = 60
>>> max_lon = 0
>>> extracted_cube = extract_rot_cube(cube, min_lat, min_lon, max_lat, max_lon)
>>> max_lat_cube = np.max(extracted_cube.coord('latitude').points)
>>> print(f'{max_lat_cube:.3f}')
61.365
>>> min_lat_cube = np.min(extracted_cube.coord('latitude').points)
>>> print(f'{min_lat_cube:.3f}')
48.213
>>> max_lon_cube = np.max(extracted_cube.coord('longitude').points)
>>> print(f'{max_lon_cube:.3f}')
3.643
>>> min_lon_cube = np.min(extracted_cube.coord('longitude').points)
>>> print(f'{min_lon_cube:.3f}')
-16.292
"""
# adding unrotated coords to the cube
cube = add_aux_unrotated_coords(cube)
# mask the cube using the true lat and lon
lats = cube.coord("latitude").points
lons = cube.coord("longitude").points
select_lons = (lons >= min_lon) & (lons <= max_lon)
select_lats = (lats >= min_lat) & (lats <= max_lat)
selection = select_lats & select_lons
selection = da.broadcast_to(selection, cube.shape)
cube.data = da.ma.masked_where(~selection, cube.core_data())
# grab a single 2D slice of X and Y and take the mask
lon_coord = cube.coord(axis="X", dim_coords=True)
lat_coord = cube.coord(axis="Y", dim_coords=True)
for yx_slice in cube.slices(["grid_latitude", "grid_longitude"]):
cmask = yx_slice.data.mask
break
# now cut the cube down along X and Y coords
x1, x2, y1, y2 = _get_xy_noborder(cmask)
idx = len(cube.shape) * [slice(None)]
idx[cube.coord_dims(cube.coord(axis="x",
dim_coords=True))[0]] = slice(x1, x2, 1)
idx[cube.coord_dims(cube.coord(axis="y",
dim_coords=True))[0]] = slice(y1, y2, 1)
extracted_cube = cube[tuple(idx)]
return extracted_cube
