write nc file in matlab

To write a nc file in MATLAB, you need to use the NetCDF library, which allows you to access data stored in the netCDF format. Here is an example code that shows how to write a netCDF file using MATLAB:

main.m
% define file name
filename = 'example.nc';

% create variables and data to write
x = 1:10;
y = 1:5;
data = rand(10, 5);

% create netCDF file
ncid = netcdf.create(filename, 'NC_WRITE');

% define dimensions
dimx = netcdf.defDim(ncid, 'x', length(x));
dimy = netcdf.defDim(ncid, 'y', length(y));

% create variables
varx = netcdf.defVar(ncid, 'X', 'double', dimx);
vary = netcdf.defVar(ncid, 'Y', 'double', dimy);
vardata = netcdf.defVar(ncid, 'Data', 'double', [dimx dimy]);

% end definition
netcdf.endDef(ncid);

% write data
netcdf.putVar(ncid, varx, x);
netcdf.putVar(ncid, vary, y);
netcdf.putVar(ncid, vardata, data);

% close file
netcdf.close(ncid);
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In this code, you first define the file name (filename) that you want to create. Then, you define the variables (x, y, and data) and their corresponding data that you want to write to the file. After that, you create the netCDF file using the netcdf.create function, and define the dimensions and variables using the netcdf.defDim and netcdf.defVar functions. You then end the definition using the netcdf.endDef function, and write the data to the file using the netcdf.putVar function. Finally, you close the file using the netcdf.close function.