Reading data from file with jsondecode

Question

Jeferson 2024-1-31

0
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https://ww2.mathworks.cn/matlabcentral/answers/2076651-reading-data-from-file-with-jsondecode

回答： Taylor 2024-2-6

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Hello everyone :)

I am struggling reading some data from a file using jsondecode function. I have the following data in a text file:

[0, [0,

3,

1,

['X3_5', 'X4_4', 'X4_5'],

[0, 0, 1],

[1,

[[1, [-41844328211318033252367, 344173910578922950492160]],

[0, [344173910578922950492160]],

[

[[0, [66782537082182499309963]],

4],

[[0, [-764979303944605824758909685951]],

19105490]

]]]]]:

Sometimes when I run

% path to  text file
filePath = './myfile';
% Read the content of the file
fileID = fopen(filePath, 'r');
fileContent = fscanf(fileID, '%c');
fclose(fileID);
% Preprocess the content
fileContent = strrep(fileContent, '''', '"');
fileContent = strrep(fileContent, newline, '');
fileContent = strrep(fileContent, ':', '');
parsedStructure = jsondecode(fileContent);

I'm having two problems:

A different value is stored, e.g., it saves -41844328211318034137088 instead -41844328211318033252367. How can I save the values in exact arithmetic?
It ignores some brackets, e.g., the first list in [[0, [66782537082182499309963]],4] is merged as follows:

parsedStructure{2}{6}{2}{3}{1}{1}
            0
   6.6783e+22
parsedStructure{2}{6}{2}{3}{1}{2}
     4

I have tried to solve the second problem using several nested if statements. However, I feel it is adding unnecesary complexity to the code and it just fails everytime it finds another similar situation. Any advice or suggestion is well received :)