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upper case need help

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Maria
Maria 2020-5-26
评论： Image Analyst 2020-5-26
function unscramble=latinCipher(scramble)
[str,shift]=strtok(scramble,' ');
shift=str2num(shift);
str=char(mod(double(str)-97+shift,26)+97);
unscramble=upper(str);
end
for my this code, if I put lowercase 'sknz 4' it will output as 'WORD'. How could be fixed by puting uppercase 'SKNZ 4' would output as 'WORD". Because for now if I input 'SKNZ 4' it showed an unexpected value.

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Walter Roberson
Walter Roberson 2020-5-26
str=char(mod(double(lower(str))-97+shift,26)+97);
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Walter Roberson
Walter Roberson 2020-5-26
Your input might be either upper case or lower case, and you want the two to be treated the same way, and the rest of your code assumes it was lower case. That makes the easiest approach to just use lower() to convert uppercase to lowercase (leaving lowercase alone.)
Image Analyst
Image Analyst 2020-5-26
Please "Accept this answer" to give Walter reputation points to thank him.

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