give labels according to string

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Elysi Cochin 2019-11-20

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/492118-give-labels-according-to-string

评论： Star Strider 2019-11-20

采纳的回答： Star Strider

在 MATLAB Online 中打开

I have a cell array of strings with the following pattern

    String	        Label
'Abc\a1\L\XYZ1R08'	1
'Abc\a1\R\XYZ1R09'	1
'Abc\a1\R\XYZ1R10'	1
'Abc\b2\L\XYZ2L01'	2
'Abc\b2\R\XYZ2L02'	2
'Abc\b2\R\XYZ2L03'	2
'Abc\c3\L\XYZ2L04'	3
'Abc\c3\R\XYZ2L05'	3
'Abc\d4\L\XYZ2L06'	4
'Abc\d4\R\XYZ2L07'	4

i wanted to give a new variable, "Label', values according to a1,b2,c3,d4, etc

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Rik 2019-11-20

Is that label guaranteed to be between the first two slashes?

Elysi Cochin 2019-11-20

编辑：Elysi Cochin 2019-11-20

在 MATLAB Online 中打开

yes sir, based on the first two slashes

find the different elements, and give same value for same elements

(a1, b2, c3, d4 - the names can change. This is just an example)

in my example i have 4 different values a1, b2, c3, d4 (it can be greater than 4 also)

So where all i have a1, i want to give 1 , for next value (b2) next value 2 and so on

% its a cell array
my_string = {
'Abc\a1\L\XYZ1R08';
'Abc\a1\R\XYZ1R09';
'Abc\a1\R\XYZ1R10';
'Abc\b2\L\XYZ2L01';
'Abc\b2\R\XYZ2L02';
'Abc\b2\R\XYZ2L03';
'Abc\c3\L\XYZ2L04';
'Abc\c3\R\XYZ2L05';
'Abc\d4\L\XYZ2L06';
'Abc\d4\R\XYZ2L07'};

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采纳的回答

Star Strider 2019-11-20

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/492118-give-labels-according-to-string#answer_402462

在 MATLAB Online 中打开

Try this:

String = {'Abc\a1\L\XYZ1R08'
'Abc\a1\R\XYZ1R09'	
'Abc\a1\R\XYZ1R10'	
'Abc\b2\L\XYZ2L01'	
'Abc\b2\R\XYZ2L02'	
'Abc\b2\R\XYZ2L03'	
'Abc\c3\L\XYZ2L04'	
'Abc\c3\R\XYZ2L05'	
'Abc\d4\L\XYZ2L06'	
'Abc\d4\R\XYZ2L07'};
grpstr = regexp(String, '(?<=\\)\w{2}', 'once','match');    % Get Two Letters After First ‘\’
Group = findgroups(grpstr);
Result = {String, Group}                                    % Cell Array
T1 = table(string(String), Group)                           % Table

producing:

T1 =
  10×2 table
           Var1           Group
    __________________    _____
    "Abc\a1\L\XYZ1R08"      1  
    "Abc\a1\R\XYZ1R09"      1  
    "Abc\a1\R\XYZ1R10"      1  
    "Abc\b2\L\XYZ2L01"      2  
    "Abc\b2\R\XYZ2L02"      2  
    "Abc\b2\R\XYZ2L03"      2  
    "Abc\c3\L\XYZ2L04"      3  
    "Abc\c3\R\XYZ2L05"      3  
    "Abc\d4\L\XYZ2L06"      4  
    "Abc\d4\R\XYZ2L07"      4  