diff --git a/Makefile b/Makefile
index 7bdc4a4672c81648abeb04a7709273a332431c4f..413a4a3261d85000891590bdf86ca962a5177052 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ USRLDFLAGS = -L${LIB_NEWMAT} -L${LIB_PROB} -L${LIB_ZLIB}
 OBJS = miscmaths.o optimise.o miscprob.o kernel.o histogram.o base2z.o t2z.o f2z.o volume.o volumeseries.o minimize.o cspline.o sparse_matrix.o sparsefn.o rungekutta.o
 #OBJS = miscmaths.o optimise.o miscprob.o kernel.o histogram.o base2z.o t2z.o f2z.o volume.o volumeseries.o minimize.o cspline.o
 
-LIBS = -lutils -lnewmat -lprob -lm
+LIBS = -lutils -lfslio -lniftiio -lznz -lz -lnewmat -lprob -lm
 
 # The target "all" should ALWAYS be provided
 #   typically it will just be another target name
diff --git a/quick.cc b/quick.cc
index 940cde65b417be629697dd897f3761eca161e1f8..9eacfca663072d75b446f92f675a579e247ff314 100644
--- a/quick.cc
+++ b/quick.cc
@@ -14,37 +14,22 @@
 #define WANT_MATH
 
 #include "miscmaths.h"
-#include "sparse_matrix.h"
-#include "libprob.h"
+#include "t2z.h"
+//#include "libprob.h"
 
 using namespace MISCMATHS;
 
 int main(int argc, char *argv[])
 {
   try{
-    
-    SparseMatrix x(3,4);
-    SparseMatrix y(3,4);
-    x.insert(1,1,1);
-    y.insert(1,1,2);
-    y.insert(1,2,3);
+   
+    float tmp = atof(argv[1]);
+    int tmp2 = atoi(argv[2]);
 
-    x.insert(2,3,1.5);
+    OUT(tmp);
+    OUT(tmp2);
 
-    y.insert(2,4,3);
-    x.insert(2,4,-1);
-
-    y.insert(3,4,6);
-
-    SparseMatrix ret;
-
-
-    OUT(x.AsMatrix());
-    OUT(y.AsMatrix());
-
-    add(x,y,ret);
-    
-    OUT(ret.AsMatrix());
+    OUT(Z2t::getInstance().convert(tmp,tmp2));
 
   }
   catch(Exception p_excp) 
diff --git a/t2z.cc b/t2z.cc
index 43827449a0a72803c1bb687d9954e3a1249adad8..4df56bf7b33d309a8c04c7e15799f37c4e4da1f6 100644
--- a/t2z.cc
+++ b/t2z.cc
@@ -18,7 +18,22 @@ using namespace Utilities;
 namespace MISCMATHS {
 
   T2z* T2z::t2z = NULL;
+  Z2t* Z2t::z2t = NULL;
  
+  float Z2t::convert(float z, int dof) 
+    {
+      float t = 0.0;
+
+      if(z>8)
+	throw Exception("z is too large to convert to t");
+
+      double p = MISCMATHS::ndtr(z);
+      cerr << "p = " << p << endl;
+      t = MISCMATHS::stdtri(dof,p);
+
+      return t;
+    }
+
   float T2z::larget2logp(float t, int dof)
   {
     //    static float logbeta[] = {   1.144729885849, 0.693147180560,
diff --git a/t2z.h b/t2z.h
index dbcd9852728a2f4ccce6bf5cf2e422f0b7e1fa95..df1ca1063501824aaaeeac3290b856ec4de14797 100644
--- a/t2z.h
+++ b/t2z.h
@@ -54,6 +54,34 @@ namespace MISCMATHS {
     return *t2z;
   }
 
+
+
+  class Z2t
+    {
+    public:
+      static Z2t& getInstance();
+      ~Z2t() { delete z2t; }
+      
+      float convert(float t, int dof);
+
+    private:
+      Z2t()
+	{}
+      
+      const Z2t& operator=(Z2t&);
+      Z2t(Z2t&);
+
+      static Z2t* z2t;
+
+    };
+
+  inline Z2t& Z2t::getInstance(){
+    if(z2t == NULL)
+      z2t = new Z2t();
+  
+    return *z2t;
+  }
+
 }
 
 #endif