create a string like "AA";"BB";"CC";"DD", and so on

Hi! I would like to create a string like "AA";"BB";"CC";"DD",and so on.

The idea is similar to this:

letters_str = string(mat2cell('A':'Z',1,ones(1,26)))';

I would simply like to double the letters in 'letters_str'.

Answer 1

[Dyuman Joshi]

str = string(char('AA' + repmat((0:25)',1,2)))

str = 26×1 string array
    "AA"
    "BB"
    "CC"
    "DD"
    "EE"
    "FF"
    "GG"
    "HH"
    "II"
    "JJ"
    "KK"
    "LL"
    "MM"
    "NN"
    "OO"
    "PP"
    "QQ"
    "RR"
    "SS"
    "TT"
    "UU"
    "VV"
    "WW"
    "XX"
    "YY"
    "ZZ"

[Dyuman Joshi]

Another idea -

str = string(('A':'Z')');
str = join([str str],'')

str = 26×1 string array
    "AA"
    "BB"
    "CC"
    "DD"
    "EE"
    "FF"
    "GG"
    "HH"
    "II"
    "JJ"
    "KK"
    "LL"
    "MM"
    "NN"
    "OO"
    "PP"
    "QQ"
    "RR"
    "SS"
    "TT"
    "UU"
    "VV"
    "WW"
    "XX"
    "YY"
    "ZZ"