fec: remove unused mathutil.linear_fit_slope

darcs-hash:c66276a71abd205c6f93173f659fcb9523c2513b

diff --git a/zfec/zfec/util/mathutil.py b/zfec/zfec/util/mathutil.py
index 609f0dffb8f9e852ac31def926be1c786524dea8..203e95a7fc23ff3064f097268c81535297dcb81e 100644 (file)
--- a/zfec/zfec/util/mathutil.py
+++ b/zfec/zfec/util/mathutil.py
@@ -51,18 +51,6 @@ def log_ceil(n, b):
         k += 1
     return k
 
-def linear_fit_slope(ps):
-    """
-    @param ps a sequence of tuples of (x, y)
-    """
-    avex = ave([x for (x, y) in ps])
-    avey = ave([y for (x, y) in ps])
-    sxy = sum([ (x - avex) * (y - avey) for (x, y) in ps ])
-    sxx = sum([ (x - avex) ** 2 for (x, y) in ps ])
-    if sxx == 0:
-        return None
-    return sxy / sxx
-
 def permute(l):
     """
     Return all possible permutations of l.