def open_files(ncfiles, return_dsvar=False):
"""Open netCDF files, either with xray or netCDF4"""
try:
if _ncmodule == 'xray':
# open files with xray
try:
ds = xray.open_mfdataset(ncfiles)
except ValueError:
ds = xray.open_mfdataset(ncfiles, decode_times=False)
print('Warning: Using decode_times=False')
dsvar = ds
else:
# open files with netCDF4
if len(ncfiles) > 1:
ds = netCDF4.MFDataset(ncfiles)
else:
ds = netCDF4.Dataset(ncfiles[0])
dsvar = ds.variables
except RuntimeError as err:
traceback.print_exc(err)
print('Warning: File(s) could not be opened: {}'.format(ncfiles))
dsvar = None
if return_dsvar:
return ds, dsvar
else:
return ds
def open_files(ncfiles, return_dsvar=False):
"""Open netCDF files, either with xray or netCDF4"""
try:
if _ncmodule == 'xray':
# open files with xray
try:
ds = xray.open_mfdataset(ncfiles)
except ValueError:
ds = xray.open_mfdataset(ncfiles, decode_times=False)
print('Warning: Using decode_times=False')
dsvar = ds
else:
# open files with netCDF4
if len(ncfiles) > 1:
ds = netCDF4.MFDataset(ncfiles)
else:
ds = netCDF4.Dataset(ncfiles[0])
dsvar = ds.variables
except RuntimeError as err:
traceback.print_exc(err)
print('Warning: File(s) could not be opened: {}'.format(ncfiles))
dsvar = None
if return_dsvar:
return ds, dsvar
else:
return ds
def test_deterministic_names(self):
with create_tmp_file() as tmp:
data = create_test_data()
data.to_netcdf(tmp)
with open_mfdataset(tmp) as ds:
original_names = dict((k, v.data.name) for k, v in ds.items())
with open_mfdataset(tmp) as ds:
repeat_names = dict((k, v.data.name) for k, v in ds.items())
for var_name, dask_name in original_names.items():
self.assertIn(var_name, dask_name)
self.assertIn(tmp, dask_name)
self.assertEqual(original_names, repeat_names)
def test_deterministic_names(self):
with create_tmp_file() as tmp:
data = create_test_data()
data.to_netcdf(tmp)
with open_mfdataset(tmp) as ds:
original_names = dict((k, v.data.name) for k, v in ds.items())
with open_mfdataset(tmp) as ds:
repeat_names = dict((k, v.data.name) for k, v in ds.items())
for var_name, dask_name in original_names.items():
self.assertIn(var_name, dask_name)
self.assertIn(tmp, dask_name)
self.assertEqual(original_names, repeat_names)
def test_lock(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
with create_tmp_file() as tmp:
original.to_netcdf(tmp, format='NETCDF3_CLASSIC')
with open_dataset(tmp, chunks=10) as ds:
task = ds.foo.data.dask[ds.foo.data.name, 0]
self.assertIsInstance(task[-1], type(Lock()))
with open_mfdataset(tmp) as ds:
task = ds.foo.data.dask[ds.foo.data.name, 0]
self.assertIsInstance(task[-1], type(Lock()))
with open_mfdataset(tmp, engine='scipy') as ds:
task = ds.foo.data.dask[ds.foo.data.name, 0]
self.assertNotIsInstance(task[-1], type(Lock()))
def test_lock(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
with create_tmp_file() as tmp:
original.to_netcdf(tmp, format='NETCDF3_CLASSIC')
with open_dataset(tmp, chunks=10) as ds:
task = ds.foo.data.dask[ds.foo.data.name, 0]
self.assertIsInstance(task[-1], type(Lock()))
with open_mfdataset(tmp) as ds:
task = ds.foo.data.dask[ds.foo.data.name, 0]
self.assertIsInstance(task[-1], type(Lock()))
with open_mfdataset(tmp, engine='scipy') as ds:
task = ds.foo.data.dask[ds.foo.data.name, 0]
self.assertNotIsInstance(task[-1], type(Lock()))
def test_open_and_do_math(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
with create_tmp_file() as tmp:
original.to_netcdf(tmp)
with open_mfdataset(tmp) as ds:
actual = 1.0 * ds
self.assertDatasetAllClose(original, actual)
def test_open_and_do_math(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
with create_tmp_file() as tmp:
original.to_netcdf(tmp)
with open_mfdataset(tmp) as ds:
actual = 1.0 * ds
self.assertDatasetAllClose(original, actual)
def test_preprocess_mfdataset(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
with create_tmp_file() as tmp:
original.to_netcdf(tmp)
preprocess = lambda ds: ds.assign_coords(z=0)
expected = preprocess(original)
with open_mfdataset(tmp, preprocess=preprocess) as actual:
self.assertDatasetIdentical(expected, actual)
def test_open_mfdataset(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
with create_tmp_file() as tmp1:
with create_tmp_file() as tmp2:
original.isel(x=slice(5)).to_netcdf(tmp1)
original.isel(x=slice(5, 10)).to_netcdf(tmp2)
with open_mfdataset([tmp1, tmp2]) as actual:
self.assertIsInstance(actual.foo.variable.data, da.Array)
self.assertEqual(actual.foo.variable.data.chunks,
((5, 5),))
self.assertDatasetAllClose(original, actual)
with open_mfdataset([tmp1, tmp2], chunks={'x': 3}) as actual:
self.assertEqual(actual.foo.variable.data.chunks,
((3, 2, 3, 2),))
with self.assertRaisesRegexp(IOError, 'no files to open'):
open_mfdataset('foo-bar-baz-*.nc')
def test_preprocess_mfdataset(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
with create_tmp_file() as tmp:
original.to_netcdf(tmp)
preprocess = lambda ds: ds.assign_coords(z=0)
expected = preprocess(original)
with open_mfdataset(tmp, preprocess=preprocess) as actual:
self.assertDatasetIdentical(expected, actual)
def test_save_mfdataset_roundtrip(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
datasets = [original.isel(x=slice(5)), original.isel(x=slice(5, 10))]
with create_tmp_file() as tmp1:
with create_tmp_file() as tmp2:
save_mfdataset(datasets, [tmp1, tmp2])
with open_mfdataset([tmp1, tmp2]) as actual:
self.assertDatasetIdentical(actual, original)
def test_open_mfdataset(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
with create_tmp_file() as tmp1:
with create_tmp_file() as tmp2:
original.isel(x=slice(5)).to_netcdf(tmp1)
original.isel(x=slice(5, 10)).to_netcdf(tmp2)
with open_mfdataset([tmp1, tmp2]) as actual:
self.assertIsInstance(actual.foo.variable.data, da.Array)
self.assertEqual(actual.foo.variable.data.chunks,
((5, 5), ))
self.assertDatasetAllClose(original, actual)
with open_mfdataset([tmp1, tmp2], chunks={'x': 3}) as actual:
self.assertEqual(actual.foo.variable.data.chunks,
((3, 2, 3, 2), ))
with self.assertRaisesRegexp(IOError, 'no files to open'):
open_mfdataset('foo-bar-baz-*.nc')
def test_save_mfdataset_roundtrip(self):
original = Dataset({'foo': ('x', np.random.randn(10))})
datasets = [original.isel(x=slice(5)),
original.isel(x=slice(5, 10))]
with create_tmp_file() as tmp1:
with create_tmp_file() as tmp2:
save_mfdataset(datasets, [tmp1, tmp2])
with open_mfdataset([tmp1, tmp2]) as actual:
self.assertDatasetIdentical(actual, original)
def _get_grid_files(self):
"""Get the files holding grid data for an aospy object."""
datasets = []
for path in self.grid_file_paths:
try:
ds = xray.open_dataset(path, decode_times=False)
except TypeError:
ds = xray.open_mfdataset(path, decode_times=False)
datasets.append(ds)
return tuple(datasets)
def _get_grid_files(self):
"""Get the files holding grid data for an aospy object."""
datasets = []
for path in self.grid_file_paths:
try:
ds = xray.open_dataset(path, decode_times=False)
except TypeError:
ds = xray.open_mfdataset(path, decode_times=False)
datasets.append(ds)
return tuple(datasets)
def load_experiment(exp_dir, name="single_timestep", format='csv'):
""" Load the results from a complete experiment into a DataFrame.
Parameters
----------
exp_dir : str
The path to the directory containing the output CSV files
from the simulations.
name : str
The name of the experiment files; default is "single_timestep"
format : str
Either "csv" or "nc" for loading the correct input
"""
fns = sorted(glob.glob(os.path.join(exp_dir, "%s*.%s" % (name, format))))
print("Found %d files" % len(fns))
if format == 'csv':
dfs = []
print("Reading...")
for fn in fns:
print (" ", fn)
dfs.append(pd.read_csv(fn, index_col=0))
df = pd.concat(dfs, ignore_index=True)
return df
elif format == 'nc':
print("Reading...")
ds = xray.open_mfdataset(fns)
ds.set_coords(["lat", "lon", "lev"], inplace=True)
return ds
else:
raise ValueError("Format should either be 'nc' or 'csv'.")
out_tuple = In_tup(**the_dict)
return out_tuple
if __name__ == "__main__":
the_files = glob.glob('mar*nc')
the_files.sort(key=sort_name)
#
# put the 10 ensembles together along a new "ens" dimension
# checkpoint the output fields for future runs
#
firstrun = False
if firstrun:
ds = xray.open_mfdataset(the_files, engine='netcdf4', concat_dim='ens')
# dump the structure
print(ds)
#
# 3-d ensemble average for temp
#
x = ds['x']
y = ds['y']
z = ds['z']
temp = ds['TABS']
mean_temp = temp[:, 0, :, :, :].mean(dim='ens')
#
# same for velocity
#
wvel = ds['W']
def get_timeseries(ncfiles, varn, grid,
reducefunc=np.nanmean,
latlim=None, lonlim=None, k=0):
"""Get time series of any 2D POP field reduced by a numpy function
Parameters
----------
ncfiles : list of str
paths to input files
varn : str
variable name
grid : str ('T' or 'U')
which grid the variable is on
reducefunc : function
function to reduce the selected region
NOTE: must be NaN-aware
latlim : tup
latitude limits for maximum
lonlim : tup
longitude limits for maximum
k : int
layer
"""
n = len(ncfiles)
_nfiles_diag(n)
maxn = get_ulimitn()
# get mask
with xray.open_dataset(ncfiles[0], decode_times=False) as ds:
if latlim is None and lonlim is None:
mask = None
else:
mask = poppygrid.get_grid_mask(
lon = ds[grid+'LONG'],
lat = ds[grid+'LAT'],
lonlim=lonlim, latlim=latlim)
mask &= ds.variables['KM'+grid][:]>0
# read data
if n <= maxn:
with xray.open_mfdataset(ncfiles, decode_times=False) as ds:
# select variable
ds = ds[varn]
# select level
try:
ds = ds.isel(z_t=k)
except ValueError:
pass
# apply mask
if mask is not None:
ds = ds.where(mask)
tseries = ds.reduce(reducefunc, ['nlon', 'nlat']).values
timevar = ds['time']
timeax = utils.get_time_decimal_year(timevar)
else:
timeax = np.zeros(n)
tseries = np.zeros((n))
for i,fname in enumerate(ncfiles):
with xray.open_dataset(fname, decode_times=False) as ds:
# select variable
ds = ds[varn]
# select level
try:
ds = ds.isel(z_t=k)
except ValueError:
pass
# apply mask
if mask is not None:
ds = ds.where(mask)
tseries[i] = ds.reduce(reducefunc, ['nlon', 'nlat']).values
timevar = ds['time']
timeax[i] = utils.get_time_decimal_year(timevar)
# output
if use_pandas:
index = pd.Index(timeax, name='ModelYear')
ts = pd.Series(tseries, index=index, name=varn)
_pandas_add_meta_data(ts, meta=dict(
latlim = latlim,
lonlim = lonlim,
varn = varn,
reducefunc = str(reducefunc),
k = k,
grid = grid,
))
return ts
else:
return tseries, timeax
import numpy as np import os, sys, re, xray from rasterio import Affine as A from rasterio.warp import reproject, RESAMPLING from osgeo import gdal from mpl_toolkits.basemap import Basemap, addcyclic, shiftgrid # some setup pathing input_dir = '~/Documents/hur' os.chdir( input_dir ) # the level of the atmosphere we want to use atmos_level = 11 # open multiple datasets as a single file xds = xray.open_mfdataset( 'hur_Amon_GFDL-CM3_historical_r1i1p1_*.nc' ) xds_hur = xds.hur.loc['1900-01-01':'2005-12-12'] # slice the dataset using the time variable in xray object hur_lev = xds_hur[ :, atmos_level, ... ] # calculate climatology and anomalies climatology = hur_lev.loc[ '1961-01-01':'1990-12-31' ].groupby( 'time.month' ).mean( 'time' ) anomalies = hur_lev.groupby( 'time.month' ) - climatology # # # REPROJECT AND CROP EXTENT # what do we need to do to properly resample the data time_len, rows, cols = hur_lev.shape # NOTE: geotransform = [left, res, 0.0, top, 0.0, res] height = rows width = cols crs = 'epsg:4326' affine = A( *[np.diff( xds.lon )[ 0 ], 0.0, -180.0, 0.0, -np.diff( xds.lat )[ 0 ], 90.0] )
#import Ngl
#import math
from scipy import stats
from rhwhitepackages.readwrite import shiftlons
from rhwhitepackages.readwrite import xrayOpen
from rhwhitepackages.stats import regressmaps
from rhwhitepackages.readwrite import getdenfilename
# plotting
import xray.plot as xplt
uvindir = '/home/disk/eos4/rachel/Obs/ERAI/uv'
startyr = 1998
endyr = 2015
for iyear in range(startyr, endyr):
uvfile = xr.open_mfdataset(uvindir + '/interim_daily_' + str(iyear) +
'*.grb')
ulev, vlev = uvfile['u'], uvfile['v']
udash = ulev - ulev.mean(dim='longitude')
vdash = vlev - vlev.mean(dim='longitude')
EKEall = 0.5 * ((ulev * ulev) + (vlev * vlev))
EKEyears = EKEall.groupby('time.month').sum(dim='time')
EKEyears = EKEyears.rename({'month': 'time'})
EKEyears = EKEyears.rename({'latitude': 'lat'})
EKEyears = EKEyears.rename({'longitude': 'lon'})
EKEds = xr.Dataset({'EKE': EKEyears})
EKEds.to_netcdf(uvindir + '/EKE_' + str(iyear) + '.nc', mode='w')
uvindir = '/home/disk/eos4/rachel/Obs/ERAI/uv'
startyr = 1998
endyr = 2015
for iyear in range(startyr, endyr):
