what is the meaning of these random numbers

• does anyone know the meaning of this ?
• >> r = (randi(0:1, 5, 16)+'0')
• tag_arr =
• 49 48 48 49 48 48 49 48 48 49 49 48 48 49 49 49
• 49 49 49 48 49 48 48 49 48 49 49 48 48 49 49 49
• 48 49 49 48 49 49 48 48 49 48 49 48 49 48 48 48
• 49 48 49 49 49 48 48 48 48 49 48 48 48 48 49 48
• 48 49 49 48 48 49 48 49 49 48 49 48 49 48 49 49
• I am trying to understant why is it giving me only 48 and 49 values?? what is the meaning of this output.?

Answer 1

[Star Strider]

it is giving you a (5 x 16) matrix of ASCII values for '0' and '1'.

Answer 2

[Walter Roberson]

The character code for the character '0' is 48. You are generating random numbers that are either 0 or 1, and you are adding 48, so you are getting 48 or 49. You could have done,

targ_arr = char(randi(0:1, 5, 16)+'0')

targ_arr = 5×16 char array
    '0111111100101111'
    '1001111011011101'
    '1111010110111000'
    '0100010110011011'
    '0000010011001101'

to see the character equivalents.

https://en.wikipedia.org/wiki/Basic_Latin_(Unicode_block) U+0030 is '0' . U+ numbers are in hex, so

hex2dec('0030')

ans = 48