what is the meaning of these random numbers

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  • 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.?

Answers (2)

Star Strider
Star Strider on 11 Mar 2019
it is giving you a (5 x 16) matrix of ASCII values for '0' and '1'.

Walter Roberson
Walter Roberson on 15 Aug 2021
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

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