Compare 2 strings without using ismember or strcmp
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Hi, I've got a code that gives me different outputs and I want to compare the messages inside them and the ones that are not in one string(X) and are in the other(Y) write them into another output. Lets see:
K is the number of messages that has an string.
If K from X is not in Y = L
And I do not want to use ismember or srcmp because the proces would be very long.
I guess I have explained myself.
Thank youuu for the answer!!!
4 个评论
Stephen23
2021-9-27
@vicente Noguer: please give actual examples of X and Y that we can use, and the expected output.
It's not really clear what your variables are or how they are arranged. This is how I read the problem statement:
"[I have] [two?] outputs and I want to compare the messages inside them ... [and I want to extract the ones that are unique to Y]"
Are these actual string arrays, or are they cell arrays of character vectors? Are they something else? Are there actually only two?
What about them would make the built-in tools exceptionally slow?
In some certain restricted cases, there are some faster alternatives to ismember(), but I don't know if any of that even applies, because I don't know what your variables are.
flashpode
2021-9-27
编辑：Walter Roberson
2021-9-27
flashpode
2021-9-27
采纳的回答
Presuming that your examples with invalid syntax are actually supposed to be string arrays:
a = ["qwert34776";"dnfien/8863";"feihfidi234";"939405'cncieni";"300oppdf";"din2004ms"];
b = ["qpwn3feini";"300oppdf";"hfgt4568";"qwert34776";"dnfien/8863"];
c = setdiff(a,b)
Most likely using SETDIFF will be faster than writing your own function (including time to write, time to test, time to debug, time to maintain, and runtime).
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