Different outputs when using { : }
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Hi,
I am new to MATLAB and have a very basic question.
Say I have a 2x2 string:
>> str = ["Jan" "Feb"; "Mar" "Apr"]
str =
2×2 string array
"Jan" "Feb"
"Mar" "Apr"
Why are the following two different?
str{:};
A = str{:};
Thanks in advance
1 个评论
"Why are the following two different?"
Because in one case you allocate to a variable, and in other you don't.
As an aside, using curly-braces on a string array creates a comma-separated list:
Note that the comma-separated list constitutes the content of the container array, i.e. character vectors and not string scalars.
采纳的回答
Kevin Holly
2022-1-7
编辑：Kevin Holly
2022-1-7
0 个投票
When you used the braces the way you did, it turned the string array into a character array.
I would look at the following:
3 个评论
Example:
String Array
str = "test"
Check size
size(str)
Look at first element, it is still a string array
str(1)
Check size
size(str(1))
Now add braces, it is now a character array
str{1}
Check size
size(str{1})
Create Cell Array
{str}
Let's create a character array
str = 'test'
Check size
size(str)
@Kevin Holly: so string arrays are really just cell arrays of character vectors?
Kevin Holly
2022-1-7
@Stephen Cell arrays can also include numeric values and other arrays. When I first mentioned Daniya's use of braces caused the string array to become a character array, I didn't want Daniya to get confused and think the use of braces will always make a character array. For instance if you place braces around the variable, it creates a cell array. Also, it is good to know the differences. Then I decided to make the above comment to make things clear.
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