Create byte variables from a concatenate string variable

[Armand Mboutchouang]

I have a string variable which is from concatenation of responses to 11 questions (A,B,C,D,...,K). Please, how I can proceed to "deconcatenate" this string (str11) variable to 11 binary (byte) variables ? Thanks.

[Nick Cox]

Already answered at https://www.statalist.org/forums/for...g-and-a-number

[Armand Mboutchouang]

Thank you.

[Armand Mboutchouang]

Sorry to come back. The string (variable Q21) consists of alphabetical characters, that is "A,B,C,D,E,F,G,K". Based on what your suggestion,I tried instead the following without success
forval j = A/K {
gen byte Q21`j'= real(substr(Q21, `j', 1))
}

[Armand Mboutchouang]

edit Q21
Q21
ABC EFG I
A CD GH
ABC EFG
A C E G
A C G
A C G
ABCD H
A CD G
A CD G
ABCDE GH
A CD GH
A C GH
ABCD GH
ABCD G
ABCD GH
A C
A
ABC GH
ABC H
ABCDEF H

Here is the data example.

I was able to try this syntax. But it requires for all string value.
gen Q21A = 0
replace Q21A = 1 if strpos(Q21,"A") >= 1
edit Q21A Q21 if Q21A == 0 *** Checking