Closed
Description
What happened:
While computing averaged time using time_bounds via times = bounds.mean('d2'), I get weird results (see example below). It's my understanding that this is a bug, but I don't know yet where it's coming from.
I should note that in addition to getting wrong time values, the resulting time values are not monotonically increasing even though my time bounds are.
What you expected to happen:
Correct averaged time values
Minimal Complete Verifiable Example:
In [1]: import xarray as xr
In [2]: import numpy as np
In [3]: dates = xr.cftime_range(start='0400-01', end='2101-01', freq='120Y', calendar='noleap')
In [4]: bounds = xr.DataArray(np.vstack([dates[:-1], dates[1:]]).T, dims=['time', 'd2'])
In [5]: bounds
Out[5]:
<xarray.DataArray (time: 14, d2: 2)>
array([[cftime.DatetimeNoLeap(400, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(520, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(520, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(640, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(640, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(760, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(760, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(880, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(880, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(1000, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(1000, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(1120, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(1120, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(1240, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(1240, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(1360, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(1360, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(1480, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(1480, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(1600, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(1600, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(1720, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(1720, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(1840, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(1840, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(1960, 12, 31, 0, 0, 0, 0)],
[cftime.DatetimeNoLeap(1960, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(2080, 12, 31, 0, 0, 0, 0)]], dtype=object)
Dimensions without coordinates: time, d2
In [6]: bounds.mean('d2')
Out[6]:
<xarray.DataArray (time: 14)>
array([cftime.DatetimeNoLeap(460, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(580, 12, 31, 0, 0, 0, 0),
cftime.DatetimeNoLeap(116, 1, 21, 0, 25, 26, 290448),
cftime.DatetimeNoLeap(236, 1, 21, 0, 25, 26, 290448),
cftime.DatetimeNoLeap(356, 1, 21, 0, 25, 26, 290448),
cftime.DatetimeNoLeap(476, 1, 21, 0, 25, 26, 290448),
cftime.DatetimeNoLeap(596, 1, 21, 0, 25, 26, 290448),
cftime.DatetimeNoLeap(131, 2, 11, 0, 50, 52, 580897),
cftime.DatetimeNoLeap(251, 2, 11, 0, 50, 52, 580897),
cftime.DatetimeNoLeap(371, 2, 11, 0, 50, 52, 580897),
cftime.DatetimeNoLeap(491, 2, 11, 0, 50, 52, 580897),
cftime.DatetimeNoLeap(611, 2, 11, 0, 50, 52, 580897),
cftime.DatetimeNoLeap(146, 3, 4, 1, 16, 18, 871345),
cftime.DatetimeNoLeap(266, 3, 4, 1, 16, 18, 871345)], dtype=object)
Dimensions without coordinates: timeAnything else we need to know?:
Environment:
Output of xr.show_versions()
INSTALLED VERSIONS
------------------
commit: None
python: 3.7.8 | packaged by conda-forge | (default, Jul 23 2020, 03:54:19)
[GCC 7.5.0]
python-bits: 64
OS: Linux
OS-release: 3.10.0-1127.13.1.el7.x86_64
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: en_US.UTF-8
LANG: en_US.UTF-8
LOCALE: en_US.UTF-8
libhdf5: 1.10.6
libnetcdf: 4.7.4
xarray: 0.16.0
pandas: 1.1.0
numpy: 1.19.1
scipy: 1.5.2
netCDF4: 1.5.4
pydap: None
h5netcdf: None
h5py: 2.10.0
Nio: None
zarr: 2.4.0
cftime: 1.2.1
nc_time_axis: 1.2.0
PseudoNetCDF: None
rasterio: None
cfgrib: None
iris: None
bottleneck: None
dask: 2.22.0
distributed: 2.22.0
matplotlib: 3.3.0
cartopy: 0.18.0
seaborn: 0.10.1
numbagg: None
pint: None
setuptools: 49.2.1.post20200802
pip: 20.2.1
conda: None
pytest: None
IPython: 7.17.0
sphinx: None