Is it possible to create a binary vector then write it to a file?

Hi Matlab Comminity,

I am new to Matlab. I am working on an excercise which requires some binary operations, then write binary result in a file. Each character in the file must be 1 bit.

I tried looking for "binary datatype in Matlab", but it seems does not exist. I am little bit disappointed.

Could you guys give me some suggestions? What would you do when you want to work with binary number in Matlab?

Thank you so much!

Answer 1

[Walter Roberson]

fwrite(fileID, B, 'ubit1')

Caution: bits are only packed for any one call to fwrite(). Each time the data for an fwrite is finished outputting, if the bit stream is not aligned with a byte boundary then extra bits are written out to get to the byte boundary, leaving it positioned at a byte boundary for the next I/O call.

Answer 2

[Azzi Abdelmalek]

you can work with logical data type

a=logical([1 0 0 1])

[Tai Doan]

Thank you, Azzi! Is there any way to write them into a file as binary character? This is what I tried:

 B = ones(1,1000);
 B = logical(B);
 fileID = fopen('binary', 'w');
 fwrite(fileID,B);
 fclose(fileID);

But the file's size is 1000 bytes, not 1000 bits. Any idea?