diff --git a/README.rst b/README.rst
index b0534be3..69c203f1 100644
--- a/README.rst
+++ b/README.rst
@@ -33,7 +33,6 @@ October 23, 2014
 
     ==   ========   ======    ===========    =======
          name       octave    speedboots     speedup
-                                                     
     ==   ========   ======    ===========    =======
     1    rand       2.58      0.36           0.14
     2    randn      2.26      1.04           0.46
diff --git a/smop/Makefile b/smop/Makefile
index eacc1ec6..90d8502b 100644
--- a/smop/Makefile
+++ b/smop/Makefile
@@ -1,5 +1,6 @@
 # for py3: make PYTHON=python3 CYTHON="cython -3" V=3.4
 
+VPATH = $(SCRIPTS)/general:$(SCRIPTS)/specfun
 OCTAVE = /home/lei/octave-3.8.2
 SCRIPTS = $(OCTAVE)/scripts
 
@@ -7,15 +8,18 @@ CYTHON = cython
 PYTHON = python
 #FLAGS = -S stft.m,datenum.m -X orderfields.m,legend.m,pack.m,unpack.m,__unimplemented__.m,assert.m,optimset.m
 #FLAGS = -X interp1.m,interpn.m,nargchk.m,nargoutchk.m,profexplore.m,profshow.m,quadgk.m,quadl.m
-FLAGS = -Xquadgk.m,quadl.m,lcm.m,adaptlobstp.m,spline.m,ppval.m
+FLAGS = -Xquadgk,quadl,lcm,adaptlobstp,spline,ppval,ellipke
 V = 2.7
 ALL = \*.m
 
 all: mybench.py 
 	$(PYTHON) -c "import mybench ; mybench.mybench()"
 
-octave.py:
-	find $(SCRIPTS)/general $(SCRIPTS)/specfun -name \*.m | xargs smop -v -o $@ -r core $(FLAGS)
+octave.py: randi.m primes.m
+	$(PYTHON) main.py $^ -r core -o $@
+
+#octave.py:
+#	find $(SCRIPTS)/general $(SCRIPTS)/specfun -name \*.m | xargs smop -v -o $@ -r core $(FLAGS)
 
 go_so: solver.so
 	$(PYTHON) go.py	
@@ -43,7 +47,7 @@ check:
 test:
 	find $(SCRIPTS) -name $(ALL) | xargs python main.py $(FLAGS)
 
-%.c: %.pyx
+%.c: %.py
 	$(CYTHON) $^
 
 %.so: %.c
diff --git a/smop/backend.py b/smop/backend.py
index d0de0ac6..f88ef035 100644
--- a/smop/backend.py
+++ b/smop/backend.py
@@ -45,7 +45,7 @@ def _backend(self,level=0):
         return " + ".join(a._backend() for a in self.args)
     else:
         #import pdb; pdb.set_trace()
-        return "np.r_[%s]" % self.args[0]._backend()
+        return "cat(%s)" % self.args[0]._backend()
 
 @extend(node.cellarrayref)
 def _backend(self,level=0):
diff --git a/smop/core.py b/smop/core.py
index c73a634a..12dbb57a 100644
--- a/smop/core.py
+++ b/smop/core.py
@@ -6,7 +6,7 @@
 import __builtin__
 
 import numpy
-from numpy import abs,ceil,floor,sqrt
+from numpy import sqrt
 from numpy.fft import fft2
 from numpy.linalg import inv
 from numpy.linalg import qr  as _qr 
@@ -336,6 +336,9 @@ def __init__(self,*args):
         for i in range(0,len(args),2):
             setattr(self,str(args[i]),args[i+1])
 
+def abs(a):
+    return numpy.abs(a)
+
 def arange(start,stop,step=1,**kwargs):
     """
     >>> a=arange(1,10) # 1:10
@@ -346,6 +349,11 @@ def arange(start,stop,step=1,**kwargs):
                                  stop+1,
                                  step,
                                  **kwargs).reshape(1,-1),**kwargs)
+def cat(*args):
+    return np.concatenate([matlabarray(a) for a in args],axis=1)
+
+def ceil(a):
+    return numpy.ceil(a)
 
 def cell(*args):
     if len(args) == 1:
@@ -401,6 +409,9 @@ def find(a,n=None,d=None,nargout=1):
                 matlabarray((j+1).reshape(-1,1)))
     raise NotImplementedError
 
+def floor(a):
+    return numpy.floor(a)
+
 def fopen(*args):
     try:
         fp = open(*args)
diff --git a/smop/main.py b/smop/main.py
index eb7fce1e..b8a4b953 100644
--- a/smop/main.py
+++ b/smop/main.py
@@ -82,7 +82,7 @@ def main():
         elif o in ("-d", "--dot"):
             dot = re.compile(a)
         elif o in ("-X", "--exclude"):
-            exclude_list += a.split(",")
+            exclude_list += [ "%s.m" % b for b in a.split(",")]
         elif o in ("-v", "--verbose"):
             options.verbose += 1
         elif o in ("-V", "--version"):