--- a
+++ b/functions/@memmapdata/subsasgn.m
@@ -0,0 +1,59 @@
+% SUBSASGN - define index assignment for eegdata objects
+%
+% Author: Arnaud Delorme, SCCN, INC, UCSD, Nov. 2008
+
+% Copyright (C) 2008 Arnaud Delorme, SCCN, INC, UCSD
+%
+% This file is part of EEGLAB, see http://www.eeglab.org
+% for the documentation and details.
+%
+% Redistribution and use in source and binary forms, with or without
+% modification, are permitted provided that the following conditions are met:
+%
+% 1. Redistributions of source code must retain the above copyright notice,
+% this list of conditions and the following disclaimer.
+%
+% 2. Redistributions in binary form must reproduce the above copyright notice,
+% this list of conditions and the following disclaimer in the documentation
+% and/or other materials provided with the distribution.
+%
+% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+% ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+% LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+% CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+% SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+% INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+% CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+% ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+% THE POSSIBILITY OF SUCH DAMAGE.
+
+function b = subsasgn(a,index,val)
+    
+    i.type = '()';
+    i.subs = { ':' ':' ':' };
+    b = subsref(a, i); % note that subsref cannot be called directly
+    c = subsref(val, i);
+    b = builtin('subsasgn', b, index, c);
+    return;
+    
+    
+switch index.type
+ case '()'
+  switch length(index.subs)
+   case 1, a.data(index.subs{1}) = val;
+   case 2, a.data(index.subs{1}, index.subs{2}) = val;
+   case 3, a.data(index.subs{1}, index.subs{2}, index.subs{3}) = val;
+   case 4, a.data(index.subs{1}, index.subs{2}, index.subs{3}, index.subs{4}) = val;
+  end
+ case '.'
+  switch index.subs
+   case 'srate'
+    a.srate = val;
+   case 'nbchan'
+    a.nbchan = val;
+   otherwise
+    error('Invalid field name')
+   end
+end