有没有办法轻松将 .mat 文件转换为 .nc 文件？

尝试将数据从.mat文件到一个.nc文件，这样我就可以使用 NCVIEW 快速查看数据。

我想保存到的变量.nc文件看起来像这样：

• 变量名称：Watts_Map
• 变量说明：Wattages plotted over a set of geographic grid cells

• 可变尺寸：<225x61x2920 double>

  所以这将是一个 3-D netCDF 文件。

矩阵是225x61，对于每个时间步长。有2920时间步长。每个网格单元包含一个瓦数值。所以有2920维数矩阵225x61.

• 经度：0W to 140W, 0.625 deg分辨率，表示为225

• 纬度：0N to 30N, 0.5 deg分辨率，表示为61

似乎没有一种直观的方法可以做到这一点。试nccreate and ncwrite.

关于如何做到这一点有什么建议吗？

这是我正在尝试的代码：

% Clear out all data and clean up workspace

clc;
clear all;

% load the .mat file to be converted to netcdf file

%load('2000_ATL_Watts_Maps_inc_Land.mat');

% variable to be taken from .mat file and saved as netcdf file
% Watts_Map = W/sq m 
% Dimensions:  225x61x2920 (lon x lat x time)
% 
% Put another way, there are 2920 maps of size 225x61, containing W/sq m
% values for each grid cell
%
% Resolution:  longitude = 0.625 deg
%              latitude = 0.5 degree
%              time = starts at midnight on Jan 1st of the year, increments
%                     every 3 hours.  So timestep 1 is midnight on Jan 1st, 
%                     timestep 2 is 3am on Jan 1st, and so on.

% Create and write data to netcdf file

nccreate('test_files.nc','Watts','Dimensions',{'time' 2920 'lon' 225 'lat' 61});

希望这能让您开始：

%% Create
!rm test_files.nc
nccreate('test_files.nc','Watts','Dimensions',{'time' 2920 'lon' 225 'lat' 61});
nccreate('test_files.nc','lat','Dimensions',{'lat' 61});
nccreate('test_files.nc','lon','Dimensions',{'lon' 225});
nccreate('test_files.nc','time','Dimensions',{'time' 2920});
ncdisp('test_files.nc');

%% write dimensions
% https://www.unidata.ucar.edu/software/netcdf/docs/netcdf/Dimensions.html

%Latitude: 0N to 30N, 0.5 deg resolution, denoted by 61
ncwrite('test_files.nc','lat',0:.5:30);
%Longitude: 0W to 140W, 0.625 deg resolution, denoted by 225
ncwrite('test_files.nc','lon',0:.625:140);
% Time?

%% write data
ncwrite('test_files.nc','Watts',rand(2920,225,61));