diff --git a/matlab/CreateNF2FFBox.m b/matlab/CreateNF2FFBox.m
index 192a408..2107662 100644
--- a/matlab/CreateNF2FFBox.m
+++ b/matlab/CreateNF2FFBox.m
@@ -1,5 +1,5 @@
-function [CSX nf2ff] = CreateNF2FFBox(CSX, name, start, stop, directions)
-% function [CSX nf2ff] = CreateNF2FFBox(CSX, name, start, stop, directions)
+function [CSX nf2ff] = CreateNF2FFBox(CSX, name, start, stop, varargin)
+% function [CSX nf2ff] = CreateNF2FFBox(CSX, name, start, stop, varargin)
 %
 % create the dump boxes needed for the near field to far field transformation
 % 
@@ -7,49 +7,64 @@ function [CSX nf2ff] = CreateNF2FFBox(CSX, name, start, stop, directions)
 %   name:       name of this nf2ff box
 %   start/stop: start/stop coordinates for the nf2ff box (this box has to
 %               enclose all radiating structures!)
+% optional inputs:
+%   'Directions': enable/disable specific directions, e.g.
+%                 'Directions',[1 1 0 0 1 1]
+%                   -> disable nf2ff in +/-y direction
 %
 % example:
-%   see examples/NF2FF/infDipol.m
+%   see Tutorials/Simple_Patch_Antenna.m
 % 
 % See also AnalyzeNF2FF
 %
 % (C) 2010 Sebastian Held <sebastian.held@gmx.de>
-% (C) 2010, 2011 Thorsten Liebig <thorsten.liebig@gmx.de>
+% (C) 2010-2012 Thorsten Liebig <thorsten.liebig@gmx.de>
 
 if (nargin<5)
     directions = ones(6,1);
 end
 
-nf2ff.filenames_E = {[name '_Et_xn'],[name '_Et_xp'],[name '_Et_yn'],[name '_Et_yp'],[name '_Et_zn'],[name '_Et_zp']};
-nf2ff.filenames_H = {[name '_Ht_xn'],[name '_Ht_xp'],[name '_Ht_yn'],[name '_Ht_yp'],[name '_Ht_zn'],[name '_Ht_zp']};
+directions = ones(6,1);
+add_args = {};
+dump_type = 0;
+
+for n=1:numel(varargin)/2
+    if strcmp(varargin{2*n-1},'Frequency')
+        add_args = {'Frequency', varargin{2*n}};
+        dump_type = 10;
+    end
+    if strcmp(varargin{2*n-1},'Directions')
+        directions=varargin{2*n};
+    end
+end
+
+nf2ff.name = name;
+nf2ff.filenames_E = {[name '_E_xn'],[name '_E_xp'],[name '_E_yn'],[name '_E_yp'],[name '_E_zn'],[name '_E_zp']};
+nf2ff.filenames_H = {[name '_H_xn'],[name '_H_xp'],[name '_H_yn'],[name '_H_yp'],[name '_H_zn'],[name '_H_zp']};
 nf2ff.directions = directions;
 
-if (directions(1))
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_E{1},'DumpType',0,'DumpMode',2,'FileType',1), nf2ff.filenames_E{1}, 0, start, [start(1) stop(2) stop(3)] );
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_H{1},'DumpType',1,'DumpMode',2,'FileType',1), nf2ff.filenames_H{1}, 0, start, [start(1) stop(2) stop(3)] );
+for nd = 1:3
+    pos = 2*nd-1;
+    if (directions(pos))
+        l_start = start;
+        l_stop = stop;
+        l_stop(nd) = start(nd);
+        CSX = AddBox( AddDump(CSX,nf2ff.filenames_E{pos},'DumpType',dump_type,'DumpMode',2,'FileType',1,add_args{:}), nf2ff.filenames_E{pos}, 0, l_start, l_stop );
+        CSX = AddBox( AddDump(CSX,nf2ff.filenames_H{pos},'DumpType',dump_type+1,'DumpMode',2,'FileType',1,add_args{:}), nf2ff.filenames_H{pos}, 0, l_start, l_stop );
+    else
+        nf2ff.filenames_E{pos}='';
+        nf2ff.filenames_H{pos}='';
+    end
+    pos = 2*nd;
+    if (directions(pos))
+        l_start = start;
+        l_stop = stop;
+        l_start(nd) = stop(nd);
+        CSX = AddBox( AddDump(CSX,nf2ff.filenames_E{pos},'DumpType',dump_type,'DumpMode',2,'FileType',1,add_args{:}), nf2ff.filenames_E{pos}, 0, l_start, l_stop );
+        CSX = AddBox( AddDump(CSX,nf2ff.filenames_H{pos},'DumpType',dump_type+1,'DumpMode',2,'FileType',1,add_args{:}), nf2ff.filenames_H{pos}, 0, l_start, l_stop );
+    else
+        nf2ff.filenames_E{pos}='';
+        nf2ff.filenames_H{pos}='';
+    end
 end
 
-if (directions(2))
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_E{2},'DumpType',0,'DumpMode',2,'FileType',1), nf2ff.filenames_E{2}, 0, [stop(1) start(2) start(3)], stop );
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_H{2},'DumpType',1,'DumpMode',2,'FileType',1), nf2ff.filenames_H{2}, 0, [stop(1) start(2) start(3)], stop );
-end
-
-if (directions(3))
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_E{3},'DumpType',0,'DumpMode',2,'FileType',1), nf2ff.filenames_E{3}, 0, start, [stop(1) start(2) stop(3)] );
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_H{3},'DumpType',1,'DumpMode',2,'FileType',1), nf2ff.filenames_H{3}, 0, start, [stop(1) start(2) stop(3)] );
-end
-
-if (directions(4))
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_E{4},'DumpType',0,'DumpMode',2,'FileType',1), nf2ff.filenames_E{4}, 0, [start(1) stop(2) start(3)], stop );
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_H{4},'DumpType',1,'DumpMode',2,'FileType',1), nf2ff.filenames_H{4}, 0, [start(1) stop(2) start(3)], stop );
-end
-
-if (directions(5))
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_E{5},'DumpType',0,'DumpMode',2,'FileType',1), nf2ff.filenames_E{5}, 0, start, [stop(1) stop(2) start(3)] );
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_H{5},'DumpType',1,'DumpMode',2,'FileType',1), nf2ff.filenames_H{5}, 0, start, [stop(1) stop(2) start(3)] );
-end
-
-if (directions(6))
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_E{6},'DumpType',0,'DumpMode',2,'FileType',1), nf2ff.filenames_E{6}, 0, [start(1) start(2) stop(3)], stop );
-    CSX = AddBox( AddDump(CSX,nf2ff.filenames_H{6},'DumpType',1,'DumpMode',2,'FileType',1), nf2ff.filenames_H{6}, 0, [start(1) start(2) stop(3)], stop );
-end