# HG changeset patch
# User jwe
# Date 1194539144 0
# Node ID 1d0d7be2d0f882a2c57f57646b8a140c7aab4cd4
# Parent  b01db194c5267faed650f25125f62f28aa74c7b4
[project @ 2007-11-08 16:25:44 by jwe]

diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/ChangeLog
--- a/scripts/ChangeLog	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/ChangeLog	Thu Nov 08 16:25:44 2007 +0000
@@ -1,5 +1,14 @@
 2007-11-08  John W. Eaton  <jwe@octave.org>
 
+	* control/base/dcgain.m, control/base/dre.m,
+	control/base/impulse.m, control/base/step.m,
+	control/system/dmr2d.m, control/system/ord2.m,
+	control/system/sys2ss.m, control/system/sysdimensions.m,
+	control/system/sysgetsignals.m, control/system/sysout.m,
+	control/system/tfout.m, control/system/ugain.m,
+	control/system/zpout.m, control/util/strappend.m:
+	Don't fail with usage message if nargout is too large.
+
 	* control/hinf/h2syn.m, control/hinf/hinf_ctr.m,
 	control/hinf/hinfnorm.m, control/hinf/hinfsyn.m,
 	control/hinf/hinfsyn_chk.m, control/hinf/is_dgkf.m,
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/base/dcgain.m
--- a/scripts/control/base/dcgain.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/base/dcgain.m	Thu Nov 08 16:25:44 2007 +0000
@@ -30,7 +30,7 @@
 
 function gm = dcgain (sys, tol)
 
-  if (nargin < 1 || nargin > 2 || nargout > 1)
+  if (nargin < 1 || nargin > 2)
     print_usage ();
   endif
   if (! isstruct (sys))
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/base/dre.m
--- a/scripts/control/base/dre.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/base/dre.m	Thu Nov 08 16:25:44 2007 +0000
@@ -97,7 +97,7 @@
 
 function [tvals, Plist] = dre (sys, Q, R, Qf, t0, tf, Ptol, maxits)
 
-  if (nargin < 6 || nargin > 8 || nargout != 2)
+  if (nargin < 6 || nargin > 8)
     print_usage ();
   elseif (! isstruct (sys))
     error ("sys must be a system data structure")
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/base/impulse.m
--- a/scripts/control/base/impulse.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/base/impulse.m	Thu Nov 08 16:25:44 2007 +0000
@@ -56,7 +56,7 @@
 
 function [y, t] = impulse (sys, inp, tstop, n)
 
-  if (nargin < 1 || nargin > 4 || nargout > 2)
+  if (nargin < 1 || nargin > 4)
     print_usage ();
   endif
 
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/base/step.m
--- a/scripts/control/base/step.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/base/step.m	Thu Nov 08 16:25:44 2007 +0000
@@ -57,7 +57,7 @@
 
 function [y, t] = step (sys, inp, tstop, n)
 
-  if (nargin < 1 || nargin > 4 || nargout > 2)
+  if (nargin < 1 || nargin > 4)
     print_usage ();
   endif
 
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/system/dmr2d.m
--- a/scripts/control/system/dmr2d.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/system/dmr2d.m	Thu Nov 08 16:25:44 2007 +0000
@@ -76,7 +76,7 @@
 function [dsys, fidx] = dmr2d (sys, idx, sprefix, Ts2, cuflg)
 
   ## parse input arguments
-  if(nargin != 4 | nargout > 2)
+  if (nargin != 4)
     print_usage ();
 
   elseif (!isstruct(sys))
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/system/ord2.m
--- a/scripts/control/system/ord2.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/system/ord2.m	Thu Nov 08 16:25:44 2007 +0000
@@ -65,16 +65,14 @@
 
   ## Updates
 
-  if(nargin != 2 & nargin != 3)
-    print_usage ();
-  endif
-  if (nargout > 1)
+  if (nargin == 2 || nargin == 3)
+    if (nargin == 2)
+      gain = 1.0;
+    endif
+    w = 2.0 * pi * nfreq;
+    outsys = ss ([-2.0*w*damp, -w; w, 0], [w; 0], [0, gain]);
+  else
     print_usage ();
   endif
-  if (nargin == 2)
-    gain = 1.0;
-  endif
 
-  w = 2.0 * pi * nfreq;
-  outsys = ss ([-2.0*w*damp, -w; w, 0], [w; 0], [0, gain]);
 endfunction
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/system/sys2ss.m
--- a/scripts/control/system/sys2ss.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/system/sys2ss.m	Thu Nov 08 16:25:44 2007 +0000
@@ -78,12 +78,7 @@
 
 function [a, b, c, d, tsam, n, nz, stname, inname, outname, yd] = sys2ss (sys)
 
-  if(nargin != 1)
-    print_usage ();
-  endif
-
-  if (nargout > 11)
-    warning(["sys2ss: ",num2str(nargout)," out arguments exceeds max=11"])
+  if (nargin != 1)
     print_usage ();
   endif
 
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/system/sysdimensions.m
--- a/scripts/control/system/sysdimensions.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/system/sysdimensions.m	Thu Nov 08 16:25:44 2007 +0000
@@ -68,11 +68,11 @@
 
 function [n, nz, m, p, yd] = sysdimensions (sys, opt)
 
-  if(nargout > 5 | nargin < 1 | nargin > 2)
+  if (nargin < 1 || nargin > 2)
     print_usage ();
-  elseif(!isstruct(sys))
-    print_usage ();
-  elseif(nargin == 1)
+  elseif (! isstruct (sys))
+    error ("sysdimensions: expecting system structure as first argument");
+  elseif (nargin == 1)
     opt = "all";
   endif
 
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/system/sysgetsignals.m
--- a/scripts/control/system/sysgetsignals.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/system/sysgetsignals.m	Thu Nov 08 16:25:44 2007 +0000
@@ -146,9 +146,7 @@
 
   ## Adapted from ss
 
-  if(nargin < 1 | nargin > 4 | nargout > 4)
-    print_usage ();
-  elseif(nargin > 1 & nargout > 1)
+  if (nargin < 1 || nargin > 4)
     print_usage ();
   elseif( ! isstruct(sys) )
     error("input argument must be a system data structure");
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/system/sysout.m
--- a/scripts/control/system/sysout.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/system/sysout.m	Thu Nov 08 16:25:44 2007 +0000
@@ -143,7 +143,7 @@
     if(dmat)       disp(dd);         endif
   endif
 
-  if(nargout >= 1)
+  if (nargout >= 1)
     retsys = sys;
   endif
 
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/system/tfout.m
--- a/scripts/control/system/tfout.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/system/tfout.m	Thu Nov 08 16:25:44 2007 +0000
@@ -30,7 +30,7 @@
 
 function tfout (num, denom, x)
 
-  if (nargin < 2 ) | (nargin > 3) | (nargout != 0 )
+  if (nargin < 2 || nargin > 3)
     print_usage ();
   endif
 
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/system/ugain.m
--- a/scripts/control/system/ugain.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/system/ugain.m	Thu Nov 08 16:25:44 2007 +0000
@@ -31,7 +31,7 @@
 
 function outsys = ugain (n)
 
-  if (nargin != 1 || nargout > 1)
+  if (nargin != 1)
     print_usage ();
   endif
   outsys = ss ([], [], [], eye (n));
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/system/zpout.m
--- a/scripts/control/system/zpout.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/system/zpout.m	Thu Nov 08 16:25:44 2007 +0000
@@ -30,7 +30,7 @@
 
 function zpout (zer, pol, k, x)
 
-  if (nargin < 3 ) | (nargin > 4) | (nargout != 0 )
+  if (nargin < 3 || nargin > 4)
     print_usage ();
   endif
 
diff -r b01db194c526 -r 1d0d7be2d0f8 scripts/control/util/strappend.m
--- a/scripts/control/util/strappend.m	Thu Nov 08 16:17:34 2007 +0000
+++ b/scripts/control/util/strappend.m	Thu Nov 08 16:25:44 2007 +0000
@@ -24,7 +24,7 @@
 
 function retval = strappend (strlist, suffix);
 
-  if (nargin != 2 || nargout > 1)
+  if (nargin != 2)
     print_usage ();
   elseif (! is_signal_list (strlist))
     error ("strlist must be a list of strings (see is_signal_list)");