[Spambayes-checkins] spambayes TestDriver.py,1.13,1.14

[Tim Peters]

Update of /cvsroot/spambayes/spambayes
In directory usw-pr-cvs1:/tmp/cvs-serv10786

Modified Files:
	TestDriver.py 
Log Message:
The numerically naive way of computing the sdev for the histogram
display finally went negative on me.  This isn't worth fixing right --
just call it 0 when this happens here.


Index: TestDriver.py
===================================================================
RCS file: /cvsroot/spambayes/spambayes/TestDriver.py,v
retrieving revision 1.13
retrieving revision 1.14
diff -C2 -d -r1.13 -r1.14
*** TestDriver.py	25 Sep 2002 18:39:17 -0000	1.13
--- TestDriver.py	26 Sep 2002 01:10:29 -0000	1.14
***************
*** 67,70 ****
--- 67,75 ----
              mean = self.sum / self.n
              var = self.sumsq / self.n - mean**2
+             # The vagaries of f.p. rounding can make var come out negative.
+             # There are ways to fix that, but they're too painful for this
+             # part of the code to endure.
+             if var < 0.0:
+                 var = 0.0
              print "%d items; mean %.2f; sdev %.2f" % (self.n, mean, sqrt(var))