properly catching the LinAlgError. also, prepping to change the run_baker method (more generic)

lib/baker/baker.py

@@ -27,7 +27,7 @@ def get_phis(X, R):
               ])
   try:
     phi = np.linalg.solve(A,b)
-  except LinAlgError as e:
+  except np.linalg.LinAlgError as e:
     print >> sys.stderr, "warning: get_phis: calculation of phis yielded a linearly dependant system", e
     raise smberror('get_phis')
     phi = np.dot(np.linalg.pinv(A), b)
@@ -65,7 +65,7 @@ def get_phis_3D(X, r):
               ])
   try:
     phi = np.linalg.solve(A,b)
-  except LinAlgError as e:
+  except np.linalg.LinAlgError as e:
     print >> sys.stderr, "warning: get_phis_3D: calculation of phis yielded a linearly dependant system", e
     phi = np.dot(np.linalg.pinv(A), b)
 
@@ -113,8 +113,14 @@ def run_baker(X, R, S):
 
   # calculate values only for the simplex triangle
   phi, qlin = qlinear(X, R)
+
   if [i for i in phi if i <= 0.0]:
-    print "failure"
+    s = "this is not a containing simplex:\n"
+    s += "  X: %s\n" % X
+    s += "  R: %s\n" % R
+    s += "  phi: %s, sum(%0.4e)\n" % (phi, sum(phi))
+    print >> sys.stderr, s
+    raise smberror("not containing simplex")
 
   if len(S.points) == 0:
     answer = {
@@ -152,7 +158,7 @@ def run_baker(X, R, S):
   # baker solve eq 10
   try:
     (a, b, c) = np.linalg.solve(A,b)
-  except LinAlgError as e:
+  except np.linalg.LinAlgError as e:
     print >> sys.stderr, "warning: run_baker: linear calculation went bad, resorting to np.linalg.pinv", e
     (a, b, c) = np.dot(np.linalg.pinv(A), b)
 
@@ -187,6 +193,14 @@ def run_baker_3D(X, R, S):
   # calculate values only for the triangle
   phi, qlin = qlinear_3D(X, R)
 
+  if [i for i in phi if i <= 0.0]:
+    s = "this is not a containing simplex:\n"
+    s += "  X: %s\n" % X
+    s += "  R: %s\n" % R
+    s += "  phi: %s, sum(%0.4e)\n" % (phi, sum(phi))
+    print >> sys.stderr, s
+    raise smberror("not containing simplex")
+
   if len(S.points) == 0:
     answer = {
                'a': None,