I have a .bin file(0's and 1's). I want to read 2 bits of information at a time from that file. How do I do it ?
4 views (last 30 days)
Show older comments
Explanation of the problem :
Suppose I have the binary text as: " 010010001100101011001"
I want to read " 01 " first and then I want to read " 00 " and so on till I read all the data. How do I do it ?
My code:
fileID = fopen("newencryptedmsg.bin");
A = fread(fileID,[1,2],"uint8");
disp(A)
fclose(fileID);
I've written this code but it's giving me the wrong output.
Expeceted Output : 01
Output of my code : 49 48
Can you please help me with this. Thank you.
2 Comments
OKo
on 9 Aug 2022
fileID = fopen("newencryptedmsg.bin");
A = fread(fileID,[1,2],"uint8") == '1';
disp(A)
fclose(fileID);
Your file is ASCII, so you have to compare your data with chars '1'/'0'
Answers (2)
Atsushi Ueno
on 9 Aug 2022
Edited: Atsushi Ueno
on 9 Aug 2022
Reproduce the problem:
fileID = fopen('newencryptedmsg.bin','w');
fwrite(fileID,'010010001100101011001');
fclose(fileID);
type newencryptedmsg.bin % It's binary file, but it looks like ASCII file.
fileID = fopen("newencryptedmsg.bin");
A = fread(fileID,[1,2],"uint8");
disp(A)
fclose(fileID);
Correct the problem:
fileID = fopen('newencryptedmsg.bin','w');
fwrite(fileID,[0 1 0 0 1 0 0 0 1 1 0 0 1 0 1 0 1 1 0 0 1]');
fclose(fileID);
type newencryptedmsg.bin
fileID = fopen("newencryptedmsg.bin");
A = fread(fileID,[1,2],"uint8");
disp(A)
fclose(fileID);
fileID = fopen("newencryptedmsg.bin");
A = fread(fileID,"uint8")' % just remove [1,2]
fclose(fileID);
3 Comments
Atsushi Ueno
on 9 Aug 2022
Thank you. Now I understand what you mean. I will revise my answer.
fileID = fopen('newencryptedmsg.bin','w');
fwrite(fileID,'Z'); % the contents is 0x5A (01011010b)
fclose(fileID);
fileID = fopen("newencryptedmsg.bin");
A = fread(fileID,2,'ubit1=>uint8');
disp(A)
fclose(fileID);
0 Comments
See Also
Categories
Find more on Characters and Strings in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!