Keeping Previous Iteration changes
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I am trying to change the user inputted text with the apropriate index of cipher vector. However, i cant seem to be able to keep the changes from the previous iterations of the for loop. How can i keep the changes with each iteration?
cipherVector = ['D','R','I','U','S','Y','A','Q','B','W','T','E','Z','N','L','P','M','O','C','V','H','G','F','J','X','K'];
letterVector = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
userEncrypt = input('Enter sentence','s')
for i= 1: strlength(userEncrypt)
if ismember(lower(userEncrypt(i)), letterVector)
x = strrep(userEncrypt, userEncrypt(i), cipherVector(strfind(letterVector,lower(userEncrypt(i)))))
end
end
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Réponses (1)
Fabio Freschi
le 27 Oct 2019
I see two problems in your code
1) the changes are only temporarily saved in x and x is never used
2) onec you change a letter, all the characters with that letter are changed, than the cypherLetter is changed again. For example if your sentence is 'aaa', after the first iteration you get 'DDD' and the second D is then processed at the second iteration.
I changed your code like this
cipherVector = ['D','R','I','U','S','Y','A','Q','B','W','T','E','Z','N','L','P','M','O','C','V','H','G','F','J','X','K'];
letterVector = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'];
userEncrypt = input('Enter sentence: ','s');
for i= 1: strlength(userEncrypt)
% find position
iPos = find(letterVector==lower(userEncrypt(i)));
if ~isempty(iPos)
userEncrypt(i) = cipherVector(iPos);
end
end
disp(userEncrypt)
I hope this meets your initial request
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