diff --git a/matlab/PlotHDF5FieldData.m b/matlab/PlotHDF5FieldData.m
index b1b5134..ae0f633 100644
--- a/matlab/PlotHDF5FieldData.m
+++ b/matlab/PlotHDF5FieldData.m
@@ -1,4 +1,17 @@
 function PlotHDF5FieldData(file, PlotArgs)
+% function PlotHDF5FieldData(file, PlotArgs)
+%
+% e.g.
+% PlotArgs.slice = {0 [10 20] 0};
+% PlotArgs.pauseTime=0.01;
+% PlotArgs.component=2;
+% PlotArgs.Limit = 'auto';
+% 
+% PlotHDF5FieldData('tmp/Et.h5',PlotArgs)
+%
+% openEMS matlab interface
+% -----------------------
+% author: Thorsten Liebig
 
 component = PlotArgs.component;
 
@@ -50,14 +63,18 @@ for n=1:numel(Field)
     title(fields.names{n});
     %view(3)
     axis equal
-%     if (isfield(PlotArgs,'zlim'))
-%         if ~ischar(PlotArgs.zlim)
-%             zlim(PlotArgs.zlim);
-%         elseif strcmp(PlotArgs.zlim,'auto')
-%             zlim([-max_amp*(component>0) max_amp]);
-%         end
-%     end
-%       
+    if (isfield(PlotArgs,'Limit'))
+        if ~ischar(PlotArgs.Limit)
+            caxis(PlotArgs.Limit);
+        elseif strcmp(PlotArgs.Limit,'auto')    
+            if (component>0)
+                caxis([-max_amp,max_amp]);
+            else
+                caxis([0,max_amp]);
+            end
+        end
+    end
+    
     drawnow
     pause(pauseT)
 end
\ No newline at end of file
diff --git a/matlab/ReadHDF5FieldData.m b/matlab/ReadHDF5FieldData.m
index 0524a99..83471a6 100644
--- a/matlab/ReadHDF5FieldData.m
+++ b/matlab/ReadHDF5FieldData.m
@@ -1,4 +1,13 @@
 function hdf_fielddata = ReadHDF5FieldData(file)
+% function hdf_fielddata = ReadHDF5FieldData(file)
+%
+% returns:
+% hdf_fielddata.names
+% hdf_fielddata.values
+%
+% openEMS matlab interface
+% -----------------------
+% author: Thorsten Liebig
 
 info = hdf5info(file);
 
diff --git a/matlab/ReadHDF5Mesh.m b/matlab/ReadHDF5Mesh.m
index 5988e90..3aa4f35 100644
--- a/matlab/ReadHDF5Mesh.m
+++ b/matlab/ReadHDF5Mesh.m
@@ -1,4 +1,14 @@
 function hdf_mesh = ReadHDF5Mesh(file)
+% function hdf_mesh = ReadHDF5Mesh(file)
+%
+% returns:
+% hdf_mesh.type
+% hdf_mesh.names
+% hdf_mesh.lines
+%
+% openEMS matlab interface
+% -----------------------
+% author: Thorsten Liebig
 
 info = hdf5info(file);
 
diff --git a/matlab/ReadUI.m b/matlab/ReadUI.m
index ce940ee..19d5809 100644
--- a/matlab/ReadUI.m
+++ b/matlab/ReadUI.m
@@ -1,4 +1,16 @@
 function UI = ReadUI(files, path)
+% function UI = ReadUI(files, path)
+%
+% read current and voltages from multiple files found in path
+%
+% returns voltages/currents in time and frequency-domain
+%
+% e.g.
+% UI = ReadUI({'ut1_1','ut1_2','it1'},'tmp/');
+% 
+% openEMS matlab interface
+% -----------------------
+% author: Thorsten Liebig
 
 if (nargin<2)
     path ='';
diff --git a/matlab/SetBoundaryCond.m b/matlab/SetBoundaryCond.m
index ed5ba8c..f3b73e9 100644
--- a/matlab/SetBoundaryCond.m
+++ b/matlab/SetBoundaryCond.m
@@ -3,6 +3,10 @@ function FDTD = SetBoundaryCond(FDTD,BC)
 %
 % BC = [xmin xmax ymin ymax zmin zmax];
 % ?min/?max: 0=PEC 1=PMC
+% 
+% openEMS matlab interface
+% -----------------------
+% author: Thorsten Liebig
 
 FDTD.BoundaryCond.ATTRIBUTE.xmin=BC(1);
 FDTD.BoundaryCond.ATTRIBUTE.xmax=BC(2);
diff --git a/matlab/WriteOpenEMS.m b/matlab/WriteOpenEMS.m
index 68dbf3b..691a0a4 100644
--- a/matlab/WriteOpenEMS.m
+++ b/matlab/WriteOpenEMS.m
@@ -1,4 +1,9 @@
 function WriteOpenEMS(filename, FDTD, CSX)
+% function WriteOpenEMS(filename, FDTD, CSX)
+% 
+% openEMS matlab interface
+% -----------------------
+% author: Thorsten Liebig
 
 openEMS.FDTD = FDTD;
 openEMS.ContinuousStructure = CSX;