How to insert space between strings while doing strcat ?
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for eg:
a='hello'; b='world'; strcat(a,b);
strcat(a,b) gives 'helloworld' But I need it as 'hello world' How can I do that ?
采纳的回答
Star Strider
2015-10-31
Use the square bracket [] concatenation operator, and including a space variable is the easiest way:
a='hello';
b='world';
s = ' ';
Result = [a,s,b]
Result =
hello world
4 个评论
Susan G
2019-7-3
Thank you Star Strider for giving an explanation that not only can be understood by the beginner user of MATLAB, but also one that is easily implemented across a variety of coding needs. I was having trouble creating a function handle when receiving a user entered equation in GUI (received through the get command) and then using that function handle to find a definite integral and other calculated values (i.e. Riemann sums). I used your answer to create an anonymous function and then used str2func to get a function handle that I could use.
Brilliant answer! Thank you!!!
Star Strider
2019-7-3
As always, my pleasure!
I very much appreciate your compliment!
Giuseppe Degan Di Dieco
2021-4-26
Thank you Star, you know, the most simple things are always underestimated, but actually the most difficult to found.
Best!
Star Strider
2021-4-26
@Giuseppe Degan Di Dieco — My pleasure!
更多回答（4 个）
Hugh
2017-11-21
15 个投票
I like to use the ASCII space character for this situation, code "32". for the OP: strcat(a,32,b) Extension: I would be inclined to also include a comma, code "44": strcat(a,44,32,b)
1 个评论
a='hello';
b='world';
strcat(a,44,32,b)
Walter Roberson
2018-5-5
There is a trick to strcat. Notice from the documentation,
"For character array inputs, strcat removes trailing ASCII white-space characters: space, tab, vertical tab, newline, carriage return, and form feed. For cell and string array inputs, strcat does not remove trailing white space."
This means that if you have
strcat(a, ' ', b)
then the "trailing" space of the ' ' input will be removed, which will have the effect of running the entries together. The trick is to use
strcat(a, {' '}, b)
4 个评论
Renwick Beattie
2019-2-6
A note to say that if you are using strcat on multiple line cell arrays then the {' '} needs replicated to the same size of cell array (not character array) - e.g. cellstr(repmat({' '},size(a))) if a is the cell array.
Walter Roberson
2019-2-6
a = {'hello';'bye'};
b = {'dolly';'louis'};
>> strcat(a, {' '}, b)
ans =
2×1 cell array
{'hello dolly'}
{'bye louis' }
No need to replicate the {' '}
Giuseppe Degan Di Dieco
2021-4-26
Hello everybody,
all your solutions are brilliant, and lead to the same result.
Thanks for your help and time!
Paul Safier
2025-1-30
@Walter Roberson this is a nice way to do it.
The most efficient approach is to use sprintf:
>> a = 'hello';
>> b = 'world!';
>> sprintf('%s %s',a,b)
hello world!
Larissa Bene
2018-5-5
0 个投票
strcat(string1, " "); strcat(string1, string2);
2 个评论
Renwick Beattie
2019-2-6
I get the following error on the " character
Error: The input character is not valid in MATLAB
statements or expressions.
Walter Roberson
2019-2-6
" is only valid in MATLAB from R2017a onwards. string() objects started existing in R2016b, but the input syntax of " was not enabled until R2017a.
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