Combining string and numerical values

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AJ Schmidt
AJ Schmidt 2020-4-21
评论： Stephen23 2020-4-21
Hi, I'm doing a review sheet (not for a grade), and I'm hitting a snag with combining string and character vectors. Here's my problem:
Write a function my_password that will receive a string or character vector with a message and create a password that alternates between the final letter of each word and length of each word.
I've tried the following two functions, the first one only works if your in phrase is one word, and the second returns only a character vector:
function password=my_password(inphrase)
password= inphrase(end);
passnum= strlength(inphrase);
newpass= strcat(password, int2str(passnum))
end
function password = mypassword(inphrase);
rest = strtrim(char(inphrase));
password = '';
while ~isempty(rest)
[word, rest] = strtok(rest);
password = strcat(password,int2str(word));
end
end
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AJ Schmidt
AJ Schmidt 2020-4-21
The rule is supposed to take the last letter of every word and then the number of characters in every word, so the password for your string is correct. I'm not sure how to combine the use of both characters and string values to get the password. The password can be returned as a string or character array as far as I know, so long as the correct password is found.
Stephen23
Stephen23 2020-4-21
>> str = 'I like MATLAB'
>> regexprep(str,'\s*(\w*)(\w)','$2${num2str(1+numel($1))}')
ans =
'I1e4B6'

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采纳的回答

Ameer Hamza
Ameer Hamza 2020-4-21
Try these two options
function newpass = my_password1(inphrase)
words = strsplit(inphrase, ' ');
last_char = cellfun(@(x) {x(end)}, words);
lens = cellfun(@(x) {num2str(numel(x))}, words);
X = cell(1,numel(words));
X(1:2:end) = last_char(1:2:end);
X(2:2:end) = lens(2:2:end);
newpass = strjoin(X, '');
end
function newpass = my_password2(inphrase)
words = strsplit(inphrase, ' ');
last_char = cellfun(@(x) {x(end)}, words);
lens = cellfun(@(x) {num2str(numel(x))}, words);
newpass = strjoin(strcat(last_char, lens), '');
end
Test:
my_password1('A quick brown fox')
ans =
'A5n3'
my_password2('A quick brown fox')
ans =
'A1k5n5x3'
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