Delete the line that are repeated

Question

flashpode 2021-7-19

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/881508-delete-the-line-that-are-repeated

回答： Matt J 2021-7-19

Hello, I made a code that compares two strings and what I want to do is to delete from the old strings the lines that are in the new one.

tf = strcmp(seq1,seq2);  
        disp('Comparing')
        disp(seq1);
        disp(seq2);
        disp(tf);
        if tf == 1
           disp('Ha entrado al if')
             M_conjunt = [M_conjunt,seq1];
            
        end

I want to delete the ones that are in M_conjunt from both seq1 and seq2. I do not know how to do it. Thank youu!!!!

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Jan 2021-7-19

It is not clear, what the inputs seq1 and seq2 are: CHAR vectors, Strings, cell strings, string arrays?

The useful functions are: ismember, setdiff, union, unique.

flashpode 2021-7-19

Are Strings. I use strcmp and I've used as you recomended ismember but the result is the same and I got the problem with the 0. because I want to do a matrix that contais only the messages that are just in AIS1 and not in common in AIS2 and I can't with those functions.

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Answer 1

Matt J 2021-7-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/881508-delete-the-line-that-are-repeated#answer_749683

在 MATLAB Online 中打开

what I want to do is to delete from the old strings the lines that are in the new one.

For example,

oldstring=["dog"; "fish"; "cat";"zebra"]
oldstring = 4×1 string array
    "dog"
    "fish"
    "cat"
    "zebra"
newstring=["fish"; "zebra"]
newstring = 2×1 string array
    "fish"
    "zebra"
difference=setdiff(oldstring,newstring)
difference = 2×1 string array
    "cat"
    "dog"