Concatenate variable value and variable name into new variable name.
显示 更早的评论
I would like to have the name of a variable into another variable name.
So if for example I define
animal = 'cat' and make some calculation: eg. mean. I would like a variable name which concatenates these two: 'cat_mean'.
So if swap to animal = 'dog' there will be created another variable named 'dog_mean'
Best regards Jesper
采纳的回答
Why would you want to do this though? A variable name is just a handle used in code. Suppose you create these dynamic variable names. Now everywhere afterwards in the code you have to keep working with these and using ugly code constructs to do so because you can't just refer to a variable properly by its name in the code.
Just use a struct if you want to do something like this e.g.
cat.mean = ...
dog.mean = ...
or if you only want one variable rather than separate ones for cat, dog, etc
animal.type = cat;
animal.mean = ...
animal(2).type = 'dog'
animal(2).mean = ...
3 个评论
Jesper Steen Andersen
2016-4-6
Adam
2016-4-6
Well, basically using structs as above
doc struct
will help give you the equivalent flexibility in naming whilst still allowing you to access these variables easily.
For example, you can do with struct fields what you cannot easily do with variable names - i.e. use a dynamic string to access into them e.g.
feature = 'someFeature';
myStruct.( feature ) = featureVal;
This will create a field on your structure as
myStruct.someFeature
in the same way as if you had just hard-coded that, but allowing you to have read that string dynamically from, for example, a filename.
Jesper Steen Andersen
2016-4-6
更多回答（2 个）
Orion
2016-4-5
Hi,
something like :
animal = 'cat';
operation = 'mean';
result = horzcat(animal,'_',operation)
Azzi Abdelmalek
2016-4-5
编辑：Azzi Abdelmalek
2016-4-5
animal = 'cat'
out=sprintf('%s_mean',animal)
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