What's wrong with my 'NetCDF'?

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CHANG XV 2019-11-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/491032-what-s-wrong-with-my-netcdf

评论： CHANG XV 2019-11-17

I need to change some '*.nc' files to '*.mat' files. I choose to change them to text files first (as the code showed below), but there seems something wrong with my 'ncread'. I've put the warning in this picture. I wonder know if my code have some problem? Can my code changes those '.nc' files to text files and then save the text files? AND If there have something wrong, please tell me what should I do to solve it? THANKS!!!!

clc;
clear;
datadir='D:\Sort out\Original\China_hourly_rainfall_FiT_data_output\hourly_FiT_2008_output\';
filelist=dir([datadir,'*.nc']);
k=length(filelist);
b=[];
for s=1:k
    filename=[datadir,filelist(s).name];
    data=ncread(filename,'value');
        [r, c] = size(data);
        f = fopen(filename, 'wt');
        for i = 1 : r
            for j = 1 : c
                fprintf(f, '%5d', data(i, j));
            end
            fprintf(f, '\n');
        end
        fclose(f);
end