I understand that you have a property of string type and wants to change the length of the property using object of the class. When you define a property as a string, MATLAB Coder treats it as a fixed-size string, which means it expects the string to always have the same length. When you try to assign a new value to the string property that has a different length than the original, MATLAB Coder throws an error because it cannot handle the change in size at runtime.
To work around this limitation, you can use “coder.varsize” to specify that the string property can vary in size.
Here's an example of how to define a class that uses “coder.varsize” to allow for a variable-size string property:
classdef MyClass
properties
% Pre-initialize the string with a fixed maximum length
tag;
end
methods
function obj = MyClass()
% Enable variable-sizing for the 'tag' property
coder.varsize('obj.tag', [1, 50]);
end
end
end
Now you can modify the tag variable as follows
obj = MyClass;
obj.tag = “xyzzy”
Please look at the below documentation that can be helpful for your implementation:
- coder.varsize: https://www.mathworks.com/help/coder/ref/coder.varsize.html
Hope this helps!
