Generating Random text file of size x bits

I would like to create a txt of strings/numbers that is of size x bits given the value of x

say if x = 245760 bits

This is to embed an image with x bits message.

Answer 1

[Ayush]

Hi,

To generate a random text file of a specified size in bits, you first need to convert the size from bits to bytes, as file sizes are typically measured in bytes. Since 1 byte equals 8 bits, a file size of 245,760 bits translates to 30,720 bytes (245,760 bits / 8 bits per byte). You can generate random alphanumeric characters, with each character typically occupying 1 byte. By writing these characters to a text file, you can achieve the desired file size.

Refer to the example code below:

% Desired file size in bits
x_bits = 245760;

% Convert bits to bytes
x_bytes = x_bits / 8;

% Generate random alphanumeric characters
% Use ASCII range for alphanumeric characters: 48-57 (0-9), 65-90 (A-Z), 97-122 (a-z)
characters = ['0':'9' 'A':'Z' 'a':'z'];
num_chars = length(characters);

% Generate a random string of the required length
random_string = characters(randi(num_chars, 1, x_bytes));

% Write to a text file
fileID = fopen('random_text.txt', 'w');
fwrite(fileID, random_string);
fclose(fileID);