added diff2.awk to estimate numerical second diff;

removed commented out population covariance from cov.awk;
added decimal points to pi estimate in em.awk;

1 files changed, 0 insertions, 1 deletions

diff --git a/cov.awk b/cov.awk
index 92e92a8..e69ebf5 100644
--- a/cov.awk
+++ b/cov.awk
@@ -36,7 +36,6 @@ NF > 0 {
             meanx[x,y] += dx[x,y]/count[x,y]
             meany[x,y] += dy[x,y]/count[x,y]
             C[x,y] += dx[x,y]*dy[x,y]
-            # cov_pop[x,y] = C[x,y]/count[x,y]
             (count[x,y] > 1) ? cov_samp[x,y] = C[x,y]/(count[x,y] - 1) : cov_samp[x,y] = ""
         }
     }