Why does implicit conversion happen from 'char' to 'string' when concatenating?

2 views (last 30 days)
Concatenating char arrays results in a new char array, as expected:
>> ['a', 'b', 'c']
ans =
'abc'
However, if any element of this array is a string, there is an implicit conversion of all the char arrays to strings, and the behavior is quite different:
>> ['a', "b", 'c']
ans =
1×3 string array
"a" "b" "c"
What is the reason for this?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 1 Dec 2022
In concatenation operations, the dominant object determines the class of the resulting array, according to the following documentation:
 
https://www.mathworks.com/help/matlab/matlab_oop/implicit-class-conversion.html#bvo4poc
Therefore, when the array contains both 'char' and 'string', the concatenation results in a 'string' array.
The following documentation includes other related examples to demonstrate this idea:
 
https://www.mathworks.com/help/matlab/matlab_prog/concatenation-examples.html

More Answers (0)

Categories

Find more on Data Type Conversion in Help Center and File Exchange

Products


Release

R2022b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by