Accessing Object Data
Listing Public Properties
Note
You should always treat property names as being case sensitive. |
You can see the names of all public object properties using
the properties function with
the object's class name or with an actual object. For example:
>> properties('MException')
Properties for class MException:
identifier
message
cause
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Getting Property Values
After creating an object, you can access the values of its properties:
try
a = rand(4);
a(17) = 7;
catch me % catch creates an MException object named me
disp(['Current error identifier: ' me.identifier])
end
Current error identifier: MATLAB:indexed_matrix_cannot_be_resized
Access the data in properties using dot notation:
object.PropertyName
For example, you can access the message property
of the MException object, me,
with this syntax:
>> me.message
ans =
In an assignment A(I) = B, a matrix A cannot be resized.
See Capturing Information
About the Error for more information
on using MException objects.
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Setting Property Values
Objects often restrict what values you can assign to them. For
example, the following timeseries object has 10
data values, each corresponding to a sample time:
tsobj = timeseries(rand(10,1),1:10,'Name','Random Sample');
Now suppose you attempt to set the Data property
to a three-element vector:
>> tsobj.Data = [1 2 3];
??? Error using ==> timeseries.timeseries>timeseries.set.Data at 171
Size of the data array is incompatible with the time vector.
The timeseries class design ensures that
the number of data samples matches the number of time samples. This
illustrates one of the advantages a specialized object has over a
general purpose-data structure like a MATLAB struct.
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 | Creating Objects | | Calling Object Methods |  |
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