subsref.m

matlab实用教程

function b = subsref(s,index)
% SUBSREF Define field name indexing for stock objects
fc = fieldcount(s.asset);
switch index.type
case '()'
   if (index.subs{:} <= fc)
      b = subsref(s.asset,index);
   else
      switch index.subs{:} - fc
      case 1
         b = s.numShares;
      case 2
         b = s.sharePrice;
      otherwise
         error(['Index must be in the range 1 to ', ...
            num2str(fc + 2)])
      end
   end
case '.'
   switch index.subs
   case 'numShares'
      b = s.numShares;
   case 'sharePrice'
      b = s.sharePrice;
   otherwise
      b = subsref(s.asset,index);
   end
end