--- a/extra/control-devel/INDEX	Wed Mar 07 12:34:04 2012 +0000
+++ b/extra/control-devel/INDEX	Wed Mar 07 12:45:17 2012 +0000
@@ -1,11 +1,16 @@
 control-devel >> Control Theory
 Examples
 Experimental Data Handling
+  iddata
+  @iddata/cat
+  @iddata/diff
   @iddata/get
-  iddata
+  @iddata/horzcat
+  @iddata/merge
   @iddata/plot
   @iddata/set
   @iddata/size
+  @iddata/vertcat
 System Identification
   fitfrd
   moesp

--- a/extra/control-devel/inst/@iddata/horzcat.m	Wed Mar 07 12:34:04 2012 +0000
+++ b/extra/control-devel/inst/@iddata/horzcat.m	Wed Mar 07 12:45:17 2012 +0000
@@ -16,7 +16,8 @@
 ## along with LTI Syncope.  If not, see <http://www.gnu.org/licenses/>.
 
 ## -*- texinfo -*-
-## @deftypefn {Function File} {@var{dat} =} horzcat (@var{dat1}, @var{dat2}, @dots{})
+## @deftypefn {Function File} {@var{dat} =} [@var{dat1}, @var{dat2}, @dots{}]
+## @deftypefnx {Function File} {@var{dat} =} horzcat (@var{dat1}, @var{dat2}, @dots{})
 ## Horizontal concatenation of iddata datasets.
 ## The outputs and inputs are concatenated in the following way:
 ## @code{dat.y@{e@} = [dat1.y@{e@}, dat2.y@{e@}, @dots{}]}

--- a/extra/control-devel/inst/@iddata/merge.m	Wed Mar 07 12:34:04 2012 +0000
+++ b/extra/control-devel/inst/@iddata/merge.m	Wed Mar 07 12:45:17 2012 +0000
@@ -16,7 +16,7 @@
 ## along with LTI Syncope.  If not, see <http://www.gnu.org/licenses/>.
 
 ## -*- texinfo -*-
-## @deftypefn {Function File} {@var{dat} =} vertcat (@var{dat1}, @var{dat2}, @dots{})
+## @deftypefn {Function File} {@var{dat} =} merge (@var{dat1}, @var{dat2}, @dots{})
 ## Concatenate experiments of iddata datasets.
 ## The experiments are concatenated in the following way:
 ## @code{dat.y = [dat1.y; dat2.y; @dots{}]}

--- a/extra/control-devel/inst/@iddata/vertcat.m	Wed Mar 07 12:34:04 2012 +0000
+++ b/extra/control-devel/inst/@iddata/vertcat.m	Wed Mar 07 12:45:17 2012 +0000
@@ -16,7 +16,8 @@
 ## along with LTI Syncope.  If not, see <http://www.gnu.org/licenses/>.
 
 ## -*- texinfo -*-
-## @deftypefn {Function File} {@var{dat} =} vertcat (@var{dat1}, @var{dat2}, @dots{})
+## @deftypefn {Function File} {@var{dat} =} [@var{dat1}; @var{dat2}; @dots{}]
+## @deftypefnx {Function File} {@var{dat} =} vertcat (@var{dat1}, @var{dat2}, @dots{})
 ## Vertical concatenation of iddata datasets.
 ## The samples are concatenated in the following way:
 ## @code{dat.y@{e@} = [dat1.y@{e@}; dat2.y@{e@}; @dots{}]}