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Keeping Previous Iteration changes

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Nelson Gonzalez
Nelson Gonzalez 2019 年 10 月 26 日
Commented: Adam Danz 2019 年 12 月 12 日
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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Adam Danz
Adam Danz 2019 年 10 月 31 日
@Nelson Gonzalez, please revert your question. It's disrespectful to remove your question and make it useless after volunteers gave up their time to help you.
@Fabio Freschi, if you approximately remember the question I'd be glad to edit the question and replace the text if you don't have those privileges yet.
Rena Berman
Rena Berman 2019 年 12 月 12 日
(Answers Dev) Restored edit
Adam Danz
Adam Danz 2019 年 12 月 12 日
Thank you Rena Berman

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Fabio Freschi
Fabio Freschi 2019 年 10 月 27 日
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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