error function: Fix various syntax bugs

One input argument is required

matlab/@dprior/admissible.m

@@ -133,7 +133,7 @@ try
     for i = 1:ndraws
         draw = o.draw();
         if ~o.admissible(draw)
-            error()
+            error('problem in admissible')
         end
     end
     t(1) = true;

matlab/distributions/mode_and_variance_to_mean.m

@@ -177,8 +177,7 @@ if (distribution==4)% Beta distribution
     if length(idx)>1
         error('Multiplicity of solutions for the beta distribution specification.')
     elseif isempty(idx)
-        disp('No solution for the beta distribution specification. You should reduce the variance.')
-        error();
+        error('No solution for the beta distribution specification. You should reduce the variance.')
     end
     alpha = real_roots(idx);
     beta = ((1-m)*alpha+2*m-1)/m;

matlab/estimation/dsge_simulated_theoretical_correlation.m

@@ -44,6 +44,5 @@ if strcmpi(type,'posterior')
 elseif strcmpi(type,'prior')
     CorrFileNumber = length(dir([M_.dname '/prior/moments/' M_.fname '_PriorCorrelations*']));
 else
-    disp('dsge_simulated_theoretical_correlation:: Unknown type!');
-    error()
+    error('dsge_simulated_theoretical_correlation:: Unknown type!');
 end

matlab/estimation/dsge_simulated_theoretical_covariance.m

@@ -44,8 +44,7 @@ elseif strcmpi(type,'prior')
     CheckPath('prior/moments',M_.dname);
     posterior = 0;
 else
-    disp('dsge_simulated_theoretical_covariance:: Unknown type!')
-    error();
+    error('dsge_simulated_theoretical_covariance:: Unknown type!')
 end
 
 %delete old stale files before creating new ones

matlab/estimation/dsge_simulated_theoretical_variance_decomposition.m

@@ -46,8 +46,7 @@ elseif strcmpi(type,'prior')
     CheckPath('prior/moments',M_.dname);
     posterior = 0;
 else
-    disp('dsge_simulated_theoretical_variance_decomposition:: Unknown type!')
-    error()
+    error('dsge_simulated_theoretical_variance_decomposition:: Unknown type!')
 end
 
 %delete old stale files before creating new ones

tests/write/example1.mod

@@ -84,6 +84,6 @@ end;
 
 verbatim;
   if ~isequal(M_.observed_exo_names, {'ey'; 'ex'})
-    error()
+    error('Arguments are not identical')
   end
 end;