Function for concatenating strings with delimiters?

Question

sco1 2011-11-1

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https://ww2.mathworks.cn/matlabcentral/answers/20043-function-for-concatenating-strings-with-delimiters

评论： P Lepage 2020-11-11

As the title says, I'm looking to concatenate character strings with a delimiter. For example, take 'sample','abc','1234','12' and combine them into 'sample_abc_1234_12'

I've written my own simple function for this, but I was just curious if there's a built-in function (similar to strcat) that accomplishes the same task.

Thanks!

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Answer 1

Fangjun Jiang 2011-11-1

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Something similar to this:

s={'sample','abc','1234','12'};
b=[sprintf('%s_',s{1:end-1}),s{end}]

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sco1 2011-11-1

Ah, I knew I was forgetting something, I'm used to using fprintf and forgot about sprintf. Thanks!

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Answer 2

Matthew Eicholtz 2015-9-6

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In case someone else stumbles upon this question like me, there is now a built-in function to accomplish this task:

s = {'sample','abc','1234','12'};
b = strjoin(s,'_');

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P Lepage 2020-11-11

Thanks !

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Answer 3

Rishikesh Agrawani 2018-5-10

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strjoin() can be used to concatenate elements of cell array of character vectors.

    >> cellArr = {'sample', 'abc', '1234', '12'};
    >> 
    >> strjoin(cellArr, '_')
    ans =
        'sample_abc_1234_12'
    >>

MATLAB - Use of datetime(), datestr(), strsplit(), strjoin()

    >> now = datetime('now')
    now = 
      datetime
       10-May-2018 13:21:46
    >> nowStr = datestr(datetime('now'))
    nowStr =
        '10-May-2018 13:22:33'
    >> cellArr = nowStr.strsplit()
    Struct contents reference from a non-struct array object.
    >> cellArr = strsplit(nowStr) % split by ' '
    cellArr =
      1×2 cell array
        '10-May-2018'    '13:22:33'
    >> % Concatenate all elements of cellArr
    >> [cellArr{:}]
    ans =
        '10-May-201813:22:33'
    >> % Join contents of cell array of character vectors by delimeter
    >> strjoin(cellarr, '-')
    Undefined function or variable 'cellarr'.
    Did you mean:
    >> strjoin(cellArr, '-')
    ans =
        '10-May-2018-13:22:33'
    >> strjoin(cellArr, '_')
    ans =
        '10-May-2018_13:22:33'
    >> strjoin(cellArr, '::')
    ans =
        '10-May-2018::13:22:33'
    >> cellArr2 = {'This', 'is', 'a', 'great', 'opportunity', 'to', 'learn'} 
    cellArr2 =
      1×7 cell array
        'This'    'is'    'a'    'great'    'opportunity'    'to'    'learn'
    >> strjoin(cellArr2, '-')
    ans =
        'This-is-a-great-opportunity-to-learn'
    >>