MATLAB Programming

9 Classes and Objects
A(1,2).name(3:4)
calls subsref(A,S), where S is a 3-by-1 structure array with the values:
S(1).type = '()' S(2).type = '.' S(3).type = '()'
S(1).subs = {1,2} S(2).subs = 'name' S(3).subs = {3:4}
How to Write subsref
The subsref method must interpret the subscripting expressions passed in by
MATLAB. A typical approach is to use the switch statement to determine the
type of indexing used and to obtain the actual indices. The following three
code fragments illustrate how to interpret the input arguments. In each case,
the function must return the value B.
For an array index:
switch S.type
case '()'
B = A(S.subs{:});
end
For a cell array:
switch S.type
case '{}'
B = A(S.subs{:});
end
% A is a cell array
For a structure array:
switch S.type
case '.'
switch S.subs
case 'field1'
B = A.field1;
case 'field2'
B = A.field2;
end
end
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