subsref.m

来自「一个关于adaboost算法的matlab程序,对开始接触adaboost研究的」· M 代码 · 共 43 行

function b = subsref(a,s)
%    B = SUBSREF(A,S) is called for the syntax A(I), A{I}, or A.I
%    when A is an object.  S is a structure array with the fields:
%        type -- string containing '()', '{}', or '.' specifying the
%                subscript type.
%        subs -- Cell array or string containing the actual subscripts.
%

% File:        @data/subsref.m
%
% Author:      Gunnar R"atsch, Alex Smola
% Created:     02/11/98
% Updated:     02/21/98
% 
% Copyright (c) 1998  GMD Berlin - All rights reserved
% THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE of GMD Berlin
% The copyright notice above does not evidence any
% actual or intended publication of this work.

Q = 'a';

for i=1:length(s)
  if equal(s(i).type, '.')
    Q=[Q, '.', s(i).subs];
  elseif equal(s(i).type, '()')
    tmp = length(s(i).subs);
    Q=[Q, '('];
    for j=1:(tmp-1)
      Q=[Q, 's(', num2str(i), ').subs{', num2str(j), '}, '];
    end;
    Q=[Q, 's(', num2str(i), ').subs{', num2str(tmp), '})'];
  elseif equal(s(i).type, '{}')
    tmp = length(s(i).subs);
    Q=[Q, '{'];
    for j=1:(tmp-1)
      Q=[Q, 's(', num2str(i), ').subs{', num2str(j), '}, '];
    end;
    Q=[Q, 's(', num2str(i), ').subs{', num2str(tmp), '}}'];
  end ;
end;

b=eval(Q) ;