[英]How to create a numpy array to an xarray data array?
我正在嘗試將 3D numpy 數組轉換為數據數組,但是我收到一個我無法弄清楚的錯誤。
我有一個 3D numpy 數組(緯度、經度和時間),我希望將其轉換為維度為緯度、經度和時間的 xarray 數據數組。
np.random.rand
只是為了制作 3D 數組的可重現示例:
atae = np.random.rand(10,20,30) # 3d array
lat_atae = np.random.rand(10) # latitude is the same size as the first axis
lon_atae = np.random.rand(20) # longitude is the same size as second axis
time_atae = np.random.rand(30) # time is the 3rd axis
data_xr = xr.DataArray(atae, coords=[{'y': lat_atae,'x': lon_atae,'time': time_atae}],
dims=["y", "x", "time"])
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-156-8f8f8a1fc7aa> in <module>
----> 1 test = xr.DataArray(atae, coords=[{'y': lat_atae,'x': lon_atae,'time': time_atae}],
2 dims=["y", "x", "time"])
3
~/opt/anaconda3/lib/python3.8/site-packages/xarray/core/dataarray.py in __init__(self, data, coords, dims, name, attrs, indexes, fastpath)
408 data = _check_data_shape(data, coords, dims)
409 data = as_compatible_data(data)
--> 410 coords, dims = _infer_coords_and_dims(data.shape, coords, dims)
411 variable = Variable(dims, data, attrs, fastpath=True)
412 indexes = dict(
~/opt/anaconda3/lib/python3.8/site-packages/xarray/core/dataarray.py in _infer_coords_and_dims(shape, coords, dims)
104 and len(coords) != len(shape)
105 ):
--> 106 raise ValueError(
107 f"coords is not dict-like, but it has {len(coords)} items, "
108 f"which does not match the {len(shape)} dimensions of the "
ValueError: coords is not dict-like, but it has 1 items, which does not match the 3 dimensions of the data
如何將此 numpy 數組轉換為 xarray 數據數組?
您不需要提供coords
列表,字典就足夠了:
data_xr = xr.DataArray(atae,
coords={'y': lat_atae,'x': lon_atae,'time': time_atae},
dims=["y", "x", "time"])
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