converting string code into numbers?

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Benjamin Trivers 2020-1-26

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https://ww2.mathworks.cn/matlabcentral/answers/502048-converting-string-code-into-numbers

关闭： MATLAB Answer Bot 2021-8-20

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Write a function m-file called stringcode that takes a string as input and produces an array containing a code for each letter in the string with A = 0, B = 1, ..., Z = 25 and all other characters getting the value 26

Hints

Convert the string to all upper case (using the command upper).
Convert the string to an array of ascii codes (use double).
Loop through the array and change the codes to the right values. Look up the codes for ’A’ and ’Z’.

here is my code

function    num = stringcode( word )
   asc = double(upper(word))
        if asc >= 33 & asc <=47 & asc < 0
            asc = 26
        else asc = double(upper(word))
        end      
 % simple arithmetic
    num = asc - double('A')
end