How to save character matrix into NetCdf files?

Question

Vijay Sagar 2022-8-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1773310-how-to-save-character-matrix-into-netcdf-files

评论： Vijay Sagar 2022-8-4

采纳的回答： Walter Roberson

Hi everyone, I have character matrix A1

A1='101670 '

'101670 '

I am trying to save it into a netcdf file using ncreate and ncwrite.

nccreate('file_name.nc','A1',...

'Dimensions', {'x',size(A1,1),'y',size(A1,2)},...

'FillValue','disable');

ncwrite(file_name,'A1',A1);

But It is showing some error releted to conversion of between text and number.

Error using netcdflib

The NetCDF library encountered an error during execution of 'putVaraText' function -

'Attempt to convert between text & numbers (NC_ECHAR)'.

Error in netcdf.putVar (line 84)

netcdflib(funcstr,ncid,varid,varargin{:});

Error in internal.matlab.imagesci.nc/write (line 844)

netcdf.putVar(gid, varid,start, count, varData);

Error in ncwrite (line 75)

ncObj.write(varName, varData, start, stride);

Can someone help me how to save the character matrix into netcdf file?

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Answer 1

Walter Roberson 2022-8-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1773310-how-to-save-character-matrix-into-netcdf-files#answer_1020580

The default data type is double. You need the "datatype" option.

Please recheck what x and y mean to you. You are using x as height of the matrix, but by convention y is height.

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Vijay Sagar 2022-8-4

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Thank you Walter Roberson for kind response. It helped me. I have just includes datatype option, then it worked. As per the requirement, I interchange the 'x' and 'y' options, so there is issue here.

nccreate('file_name.nc','A1',...
         'Dimensions', {'x',size(A1,1),'y',size(A1,2)},...
         'FillValue','disable','Datatype','char');         
ncwrite('file_name.nc','A1',A1);  