Want to get only characters after using bin2dec.

I'm first trying to change characters to binary using dec2bin. Have reshaped it to form a single row array and performed some actions which resulted in the shuffling of bits. Then I'm getting a data set in binary which after reshaping and using char(bin2dec) gives character array.

Problem : The obtained array consists of many blank spaces, which when copied to word sometimes shows special symbols. Is it possible to get a resultant array of only characters?

[Muhammad Usman Saleem]

share some code or error plz

[Amrita K]

AB=011111100110000001010111010010000111000000

m=numel(AB)

T=reshape(AB, (m/7),7)

CT=char(bin2dec(T))

After using the above code I'm getting CT=L@jnZ

But when m trying to reverse the whole step to get back AB, it's giving wrong results.

dec2bin('L@jnZ');

Reshape(ans, 1,35)

= 11111001100000110111100100011100000

Answer 1

[Walter Roberson]

Forward. You need the quotation marks.

AB='011111100110000001010111010010000111000000';
m=numel(AB);
T=reshape(AB, (m/7),7);
CT=char(bin2dec(T)).';

Now if you check more closely you will find that CT(1) is a blank. When you are testing your reverse you do not account for that.

AB_reconstructed = reshape(dec2bin(' L@jnZ'), 1, [])
isequal(AB, AB_reconstructed)

[Amrita K]

Thank you Sir... It's working now. But I have noticed that it's not working if I copy the CT to word and then use it in the reconstruction code. Please let me know what I'm doing wrong.

[Walter Roberson]

It works for me

AB_reconstructed = reshape(dec2bin(CT), 1, [])

[Amrita K]

Sir it working if we directly copy CT, but it's not working if m storing CT to word document, then copying it from there.

I mean.. I'm trying to execute the codes separately at different locations.

[Walter Roberson]

How are you storing it to a word document and how are you retrieving it?

[Amrita K]

I'm jus simply doing copy paste.

[Amrita K]

Thank you Sir... It's perfectly working, it was jus compatibility issue. It's a great help.

Answer 2

[James Tursa]

If you are shuffling the bits around, then you are likely getting resulting characters that are in the "non-printable" set ... i.e. those "special symbols" and other characters that don't even print. These are characters, they just aren't the usual text characters you see printed to the screen. They are a direct result of the algorithm you used to mix up the bits. So, no you can't get rid of them if you continue to use that algorithm. If you want normal text characters mapping into other normal text characters then you will need to use a different algorithm.

[Amrita K]

Sir, but while trying to decrypt the obtained array it's giving wrong results.

The text when copied and used with bin2dec it's not showing the proper binary value as expected. Can you please help?

[Image Analyst]

Since you're not sharing your code, all we can suggest for help is this link or this one.

[Amrita K]

I have now given the code above.