diff --git a/ms-sbvar/mex/mex_write_to_matlab.c b/ms-sbvar/mex/mex_write_to_matlab.c
new file mode 100644
index 000000000..7f188786d
--- /dev/null
+++ b/ms-sbvar/mex/mex_write_to_matlab.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2011 Dynare Team
+ *
+ * This file is part of Dynare.
+ *
+ * Dynare is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Dynare is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "modify_for_mex.h"
+
+void
+mex_write_to_matlab_matfile(double *data, int rows, int cols, const char *varname, const char *filename)
+{
+  mxArray *toWrite;
+  toWrite = getMxArray(data, rows, cols);
+  MATFile *matfile = matOpen(filename, "w");
+  if (matfile == NULL)
+    mexErrMsgTxt("Error encountered in mex when opening a .mat file");
+
+  if (matPutVariable(matfile, varname, toWrite) != 0 ||
+      ferror(matGetFp(matfile)) > 0 ||
+      feof(matGetFp(matfile)) > 0)
+    mexErrMsgTxt("Error encountered in mex when writing a .mat file");
+
+  if (matClose(matfile) != 0)
+    mexErrMsgTxt("Error encountered in mex when closing a .mat file");
+}
+
+void
+mex_write_to_matlab_global_struct(double *data, int rows, int cols, const char *varname)
+{
+  mxArray *toWrite;
+  toWrite = getMxArray(data, rows, cols);
+
+  int fieldnumber = mxAddField(globalMatlabStruct, varname);
+  if (fieldnumber < 0)
+    mexErrMsgTxt("Error encountered in mex when assigining to global structure");
+  mxSetFieldByNumber(globalMatlabStruct, 0, fieldnumber, toWrite);
+}
+
+mxArray *
+getMxArray(double *data, int rows, int cols)
+{
+  mxArray *mat;
+  double *pind;
+  int i;
+
+  if (rows == 1 && cols == 1)
+    mat = mxCreateDoubleScalar(data[0]);
+  else
+    {
+      mat = mxCreateDoubleMatrix(rows, cols, mxREAL);
+      if (mat != NULL)
+        {
+          pind = mxGetPr(mat);
+          for (i = 0; i < rows*cols; i++)
+            pind[i] = data[i];
+        }
+    }
+  if (mat == NULL)
+    mexErrMsgTxt("Error encountered in mex: not enough heap space to allocate memory for mxArray");
+  return mat;
+}
diff --git a/ms-sbvar/mex/modify_for_mex.h b/ms-sbvar/mex/modify_for_mex.h
index f0fe5edf6..3c66102c8 100644
--- a/ms-sbvar/mex/modify_for_mex.h
+++ b/ms-sbvar/mex/modify_for_mex.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010 Dynare Team
+ * Copyright (C) 2010-2011 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -19,34 +19,43 @@
 
 #ifndef _MEXMOD
 #define _MEXMOD
+
 void swz_exit(int status);
 void swz_fprintf_err(const char * str, ...);
 extern int constant_seed;
-#endif
 
+#endif
 
 
 #if defined(MATLAB_MEX_FILE) || defined(OCTAVE_MEX_FILE)
 
-
 #include <dynmex.h>
 #include <dynblas.h>
 #include <dynlapack.h>
+#include <mat.h>
 
 #define swzMalloc mxMalloc
 #define swzCalloc mxCalloc
 #define swzRealloc mxRealloc
 #define swzFree mxFree
 
+mxArray *globalMatlabStruct;
+
+#ifndef _MEXWRITE
+#define _MEXWRITE
+
+void mex_write_to_matlab_matfile(double *, int, int, const char *, const char *);
+void mex_write_to_matlab_global_struct(double *, int, int, const char *);
+mxArray *getMxArray(double *, int, int);
+
+#endif
 
 #else
 
-
 #define swz_fprintf_stdout printf
 #define swzMalloc malloc
 #define swzCalloc calloc
 #define swzRealloc realloc
 #define swzFree free
 
-
 #endif