Compare two string vectors with same input arguments but different length

Question

Nils Pelzer 2021-11-18

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1589779-compare-two-string-vectors-with-same-input-arguments-but-different-length

评论： Nils Pelzer 2021-11-18

Hi Guys,

I have two string arrays i want to compare. They both contain the same arguments, but in one of them some arguments are there twice or more times. My problem is, that i want to like give every argument an index number, so that in both string arrays the same argument has the same index.

For example: {a,b,c,d,e,f,g,h} and {a,a,b,c,d,d,d,e,e,f,g,h} are my strings. And i want to have two double arrays: (1,2,3,4,5,6,7,8) and (1,1,2,3,4,4,4,5,5,6,7,8).

Is it possible to make this work? Cause my string arrays, are about 25000 and 35000 rows long, and i need to put them in the "same" format, so i can procede with my script.

I would be grateful for every help i can get.

Greetings

Nils

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Answer 1

Paul 2021-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/1589779-compare-two-string-vectors-with-same-input-arguments-but-different-length#answer_834699

在 MATLAB Online 中打开

If stored in a cell arrary:

c1 =  {'a','b','c','d','e','f','g','h'};
c2 = {'a','a','b','c','d','d','d','e','e','f','g','h'};
[~,ind] = ismember(c2,c1)
ind = 1×12
     1     1     2     3     4     4     4     5     5     6     7     8

If actually stored as strings

s1 = string(c1)
s1 = 1×8 string array
    "a"    "b"    "c"    "d"    "e"    "f"    "g"    "h"
s2 = string(c2)
s2 = 1×12 string array
    "a"    "a"    "b"    "c"    "d"    "d"    "d"    "e"    "e"    "f"    "g"    "h"
[~,ind] = ismember(c2,c1)
ind = 1×12
     1     1     2     3     4     4     4     5     5     6     7     8