The ability to write a structure to a file using FWRITE is not available in MATLAB.
To work around this issue, write each field of the structure sequentially to the file. This can be done either by calling the FWRITE function from the command line for every field, or by writing a program similar to the one shown below to loop through each variable and write it to the file:
%%%Open the file in the write mode, fid is the id of the file.
%%%Assume the structure is the variable ‘a’
%%%As a sample, let ‘a’ have two fields: name and number
a.name='Mathworks';
a.number=10;
NEWLINE = sprintf('\n');
fields=fieldnames(a);
for i=1:length(fields)
fields(i);
classes{i}=eval(['class(a.' fields{i} ')']);
end
fid = fopen('testfile.txt','w+');
for j = 1: length(fields)
if ~strcmp(classes(j),'char')
str = num2str(eval(['a.' fields{j} ]));
else
str = eval(['a.' fields{j} ]);
end
fwrite(fid, str, 'uchar');
end
fwrite(fid, NEWLINE, 'char');
%%%Call this loop if you have multiple structures too.
%%%Close the file.
