NAN

[wangshuaicumt]

ps_point = d1.sel(lon='117.17638888845157', lat='35.47979166666699')
print(ps_point.values)

When I run the codes, but the terminal shows NAN. How to solve it?

nan

[jswhit]

are you using xarray?

[wangshuaicumt]

are you using xarray?

Yeah.

[wangshuaicumt]

are you using xarray?

Is there a better way to achieve?

[jswhit]

this is really not a netcdf4-python issue. I suspect you are select a point with missing or undefined data, but you would have to ask an xarray expert (maybe here).

[wangshuaicumt]

this is really not a netcdf4-python issue. I suspect you are select a point with missing or undefined data, but you would have to ask an xarray expert (maybe here).

Yeah, thanks. The data I read out using xray is like this, and the graph drawn is as follows.

<xarray.DataArray 'z' (lat: 1180, lon: 1910)>
[2253800 values with dtype=float32]
Coordinates:

• lon (lon) float64 116.2 116.2 116.2 116.2 ... 117.2 117.2 117.2 117.2
• lat (lat) float64 35.48 35.48 35.48 35.48 ... 35.97 35.97 35.97 35.97
  Attributes:
  long_name: z
  actual_range: [-153.15245056 136.86753845]

[mgrover1]

You should specify

ds.sel(lat=.., lon=..., method='nearest' )

without that, it is trying to find that exact value.