将 xarray.Dataset 的字典条目转换为 numpy 数组（用于 xy 坐标等高线绘图）

Question

I want to plot, a dictionary entry, which contains lat,on coordinates on a xy coordinate ( lat-lon). The variable looks like:

 <class 'method'>
 <bound method Mapping.values of <xarray.Dataset>
 Dimensions:  (lat: 96, lon: 144)
 Coordinates:
 lev_p    int32 200
 Dimensions without coordinates: lat, on
 Data variables:
 V        (lat, lon) float32 dask.array<chunksize=(96, 144), meta=np.ndarray>>

I want to plot V, as contour against lat and lon but when I try to plot it I get the following error:

TypeError: cannot directly convert an xarray.Dataset into a numpy array. Instead, create an xarray.DataArray first, either with indexing on the Dataset or by invoking the TypeError: cannot directly convert an xarray.Dataset into a numpy array. Instead, create an xarray.DataArray first, either with indexing on the Dataset or by invoking the to_array() method.

I tried to convert the dictionary values to an array with.to_array as well as using map(float,variable) but none worked. I can't figure out what is going on. Any advice or help with this? Thanks

Answer 1

It was actually an easy one - it was enough to extract the dictionary value and then our of that extract the variable so instead of doing something like ds['Experiment'] and get the xarray.Dataset I would do ds['Experiment']['V'] so I would get the dictionary and out of it the particular V value.