Function for concatenating strings with delimiters?

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!

Answer 1

[Fangjun Jiang]

Something similar to this:

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

[sco1]

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

Answer 2

[Matthew Eicholtz]

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,'_');

[P Lepage]

Thanks !

Answer 3

[Rishikesh Agrawani]

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'

    >>