MATLAB: Fread and fwrite application in reading file from disk

freadfwritepdf

hello everyone, can you read data from disk (say a pdf file) with a precision other than uint8 (say integer*4) and then re-write the numerical array back into a meaningful file on the disk?

Best Answer

input_data = fread(input_fid, '*uint32');
fwrite(output_fid, input_data);

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MATLAB: Fread + double-precision 8-byte floating point + precision

Farz - if the data type (within your file) is double-precision 8-byte floating point, then why not just use double or float64 as either should correspond to 8-byte floating point numbers? Check out fread input argument precision and use fread as (for example)

 A = fread(fileID,[3 3],'double');

MATLAB: How to break the input computer file into a series of bytes using MATLAB code

By default fread reads the file as bytes:

fid = fopen('yourfile', 'r');
bytes = fread(fid);
%or you can use
%bytes = fread(fid, Inf, '*uint8'); 
%to return bytes as uint8 instead of double

Best Answer

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MATLAB: Fread + double-precision 8-byte floating point + precision

MATLAB: How to break the input computer file into a series of bytes using MATLAB code

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