mr_gstep, mr_hessian: fix Octave compatibility issue

These functions were saving the whole workspace (with a "save" command). This
workspace includes a function handle which Octave does not know how to save.
The quick fix was to remove these "save", since they also harm performance and
are only useful for debugging purposes.

matlab/mr_gstep.m

@@ -62,10 +62,7 @@ while i<n
         end
         xh1=x;
     end
-    save gstep.mat
 end
 
-save gstep.mat
-
 
 

matlab/mr_hessian.m

@@ -6,7 +6,7 @@ function [hessian_mat, gg, htol1, ihh, hh_mat0, hh1] = mr_hessian(init,x,func,hf
 %
 % adapted from Michel Juillard original rutine hessian.m
 %
-%  func =  name of the function: func must give two outputs:
+%  func =  function handle. The function must give two outputs:
 %    - the log-likelihood AND the single contributions at times t=1,...,T
 %    of the log-likelihood to compute outer product gradient
 %  x = parameter values
@@ -144,7 +144,6 @@ while i<n
         h1(i)=h10;
         i=0;
     end
-    save hess.mat
 end
 
 h_1=h1;
@@ -176,7 +175,6 @@ if hflag==2
             xh_1(i)=x(i);
             xh_1(j)=x(j);
             j=j+1;
-            save hess.mat
         end
         i=i+1;
     end
@@ -235,4 +233,3 @@ if any(isnan(hessian_mat))
 end
 hh1=h1;
 htol1=htol;
-save hess.mat