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How does on create a vector of class based on class name given as string?

5 vues (au cours des 30 derniers jours)
John
John le 25 Mai 2015
Modifié(e) : Stephen23 le 25 Mai 2015
Suppose I have a function that should create and return a vector of a certain class where the class name is passed in as a char array (i.e. string). Is it possible to do this in MATLAB? It's certainly possible if you hard-code in the class name. But I would like to be able to pass into the function the name of the class I want to create an array of. The function prototype look like this:
%vector_size is the number of elements in the vector
%element_type is the type of element the vector will initially contain (a class)
function vector = createVector(vector_size, element_type)
And suppose I have a hypothetical class called ElementA, I would create a vector of ElementA with 5 elements like this:
myvector = createVector(5, 'ElementA')
How could one go about doing this?

Réponses (2)

Stephen23
Stephen23 le 25 Mai 2015
Modifié(e) : Stephen23 le 25 Mai 2015
With the inbuilt data classes you can use cast:
>> A = [1,2,3]
A =
1 2 3
>> class(A)
ans =
double
>> B = cast(A,'uint64')
B =
1 2 3
>> class(B)
ans =
uint64
EDIT: use cast instead of typecast, as per Walter Roberson's suggestion.
  2 commentaires
Walter Roberson
Walter Roberson le 25 Mai 2015
You would probably want cast() rather than typecast()
Stephen23
Stephen23 le 25 Mai 2015
Yes, in this case cast is probably the best answer. I will edit and add this.

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Walter Roberson
Walter Roberson le 25 Mai 2015
You might be able to use
zeros(1, vector_size, element_type)

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