Python:如何在netCDF4中使用MFdataset [英] Python: How to use MFdataset in netCDF4

问题描述

我正在尝试读取多个NetCDF文件，并且我的代码返回错误:

I am trying to read multiple NetCDF files and my code returns the error:

ValueError:MFNetCDF4仅适用于NETCDF3_ *和NETCDF4_CLASSIC格式的文件，不适用于NETCDF4.

ValueError: MFNetCDF4 only works with NETCDF3_* and NETCDF4_CLASSIC formatted files, not NETCDF4.

我查阅了文档，但NetCDF4不支持MFdataset，所以我很困惑从这里开始.

I looked up the documentation and MFdataset is not supported by NetCDF4, so I'm confused where to go from here.

推荐答案

我认为错误很明显，但是有很多方法可以避免它.

I think the error is pretty clear, but there are ways to avoid it.

1/您可以使用以下方法将NetCDF文件从NetCDF4转换为经典格式: nccopy :

1/ You could convert the NetCDF files from NetCDF4 to the classic format using e.g. nccopy:

nccopy -k classic nc4_file.nc ncclassic_file.nc

2/ xarray 具有类似的方法(称为open_mfdataset)，它能够处理NetCDF4文件.快速测试:

2/ xarray has a similar method (called open_mfdataset) which is able to handle NetCDF4 files. A quick test:

import netCDF4 as nc4
test = nc4.MFDataset(['test0.nc','test1.nc'])

这给了我与您同样的错误("MFNetCDF4仅适用于..." )，xarray同样适用，没有任何问题:

This gives me the same error as you get ("MFNetCDF4 only works with..."), the same with xarray works without any problems:

import xarray as xr
test = xr.open_mfdataset(['test0.nc', 'test1.nc'])

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