What happened?

i just want plot particular time steps variable data define rain=((rainnc(t=17))-rainnc(t=9))) how can do it in python any idea

What did you expect to happen?

i want data only some time steps how can i eleminate other timesteps

Minimal Complete Verifiable Example

```python import xarray as xr import cartopy.crs as ccrs from cartopy import feature as cf import matplotlib.pyplot as plt import numpy as np

Opening and reading data

data=xr.open_dataset("heavyrain3.nc") print(data)

lon=data.lon[:] lat=data.lat[:]

lev_2=data.lev_2[:]

rainnc=data.rainnc[17-9]

time=data.time[0]

ax = plt.axes(projection=ccrs.PlateCarree())

rainnc.isel(time=16, lev_2=0).plot.pcolormesh(cmap='Purples',add_colorbar=False);

ax.set_extent([west, east, south, north])

ax.coastlines() ax.add_feature(cf.BORDERS)

plt.savefig("rain31.jpg") plt.show() ```

Relevant log output

python raise ValueError( ValueError: Dimensions {'time'} do not exist. Expected one or more of ('lev_2', 'lat', 'lon')

Anything else we need to know?

No response

Environment

Traceback (most recent call last): File "/home/user/Documents/IGCAR/rain/rain.py", line 39, in <module> rainnc.isel(time=16, lev_2=0).plot.pcolormesh(cmap='Purples',add_colorbar=False); File "/home/user/anaconda3/lib/python3.9/site-packages/xarray/core/dataarray.py", line 1208, in isel variable = self._variable.isel(indexers, missing_dims=missing_dims) File "/home/user/anaconda3/lib/python3.9/site-packages/xarray/core/variable.py", line 1190, in isel indexers = drop_dims_from_indexers(indexers, self.dims, missing_dims) File "/home/user/anaconda3/lib/python3.9/site-packages/xarray/core/utils.py", line 834, in drop_dims_from_indexers raise ValueError( ValueError: Dimensions {'time'} do not exist. Expected one or more of ('lev_2', 'lat', 'lon')