strcat including space (i.e, ' ')

The “ strcat ” function ignores trailing whitespace characters in character vectors. However, “strcat” preserves them in cell arrays of character vectors or string arrays.

a = {'word1'};
b = {'word2'};
c = strcat(a,{' '},b)

You also can use the “plus” operator to combine strings. Starting in R2017a, use double quotes to create strings. For more information on strings, see the “ string ” data type.

a = "word1";
b = "word2";
c = a + " " + b

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Captain Karnage 2022-8-26

编辑：Voss 2022-8-26

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FYI for anyone else reading, I had a cell array of strings and I wanted to concatenate the same string (with a space in it) to each of the strings in the cell array (no spaces in these strings). The square bracket (first) method of course doesn't work, neither does the "plus" operator (third/last) method for that. However, the "strcat" using a single cell array with a space (2nd/middle above) method does work.

To specifically show an example:

a = 'Addme';
b = { 'to', 'each', 'one', 'of', 'these', 'words', 'with', 'a', 'space'};
c = strcat(a,{' '},b)
c = 1×9 cell array
    {'Addme to'}    {'Addme each'}    {'Addme one'}    {'Addme of'}    {'Addme these'}    {'Addme words'}    {'Addme with'}    {'Addme a'}    {'Addme space'}

Walter Roberson 2022-8-26

编辑：Walter Roberson 2022-8-26

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a = 'Addme';
b = { 'to', 'each', 'one', 'of', 'these', 'words', 'with', 'a', 'space'};
strjoin([a, b])
ans = 'Addme to each one of these words with a space'
a + " " + b
ans = 1×9 string array
    "Addme to"    "Addme each"    "Addme one"    "Addme of"    "Addme these"    "Addme words"    "Addme with"    "Addme a"    "Addme space"

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Answer 2

Paulo Silva 2011-6-11

5
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/9285-strcat-including-space-i-e#answer_12787

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c=[a ' ' b]

strcat ignores trailing ASCII white space characters and omits all such characters from the output. White space characters in ASCII are space, newline, carriage return, tab, vertical tab, or form-feed characters, all of which return a true response from the MATLAB isspace function. Use the concatenation syntax [s1 s2 s3 ...] to preserve trailing spaces. strcat does not ignore inputs that are cell arrays of strings.

Reference

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Daniel Foose 2018-2-23

This is better than the accepted answer because it keeps the type the same. The accepted answer returns a cell with a string in it (which is different from a string). This answer returns a string.

Walter Roberson 2018-2-23

在 MATLAB Online 中打开

The accepted answer returns a cell with a character vector in it. Strings did not exist in R2011a. If strings were being used then you would use a different approach:

>> a = "word1"; b = "word2"; a + " "  + b
ans = 
    "word1 word2"

This requires R2017a or later. For R2016b,

>> a = string('word1'); b = string('word2'); a + ' ' + b

and before R2016b strings did not exist.

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Answer 3

Jy·Li 2023-5-25

2
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/9285-strcat-including-space-i-e#answer_1244409

c=strcat(a,32,b); % the unicode value of ' ' is 32

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Answer 4

Usman Nawaz 2020-9-6

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/9285-strcat-including-space-i-e#answer_490702

use double quotes instead of single quotes, worked for me.

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Walter Roberson 2020-9-6

That can be useful, but the output would be a string() object instead of a character vector. string() objects can be useful, but they need slightly different handling than character vectors.

string() objects became available in R2016b; using double-quotes to indicate string objects became available in R2017a.

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