MATLAB Programming

Designing User Classes in MATLAB
The end method has the calling sequence
end(a,k,n)
where a is the user object, k is the index in the expression where the end
syntax is used, and n is the total number of indices in the expression.
Forexample,considertheexpression
A(end-1,:)
MATLAB calls the end method defined for the object A using the arguments
end(A,1,2)
That is, the end statement occurs in the first index element and there are two
index elements. The class method for end must then return the index value for
the last element of the first dimension. When you implement the end method
for your class, you must ensure it returns avalueappropriate for the object.
Indexing an Object with Another Object
When MATLAB encounters an object as an index, it calls the subsindex
method defined for the object. For example, suppose you have an object a and
you want to use this object to index into another object b.
c = b(a);
A subsindex method might do something as simple as convert the object to
double format to be used as an index, as shown in this sample code.
function d = subsindex(a)
%SUBSINDEX
% convert the object a to double format to be used
% as an index in an indexing expression
d = double(a);
subsindex values are 0-based, not 1-based.
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