From 2140aa909280dfa8506466aa20b2c2b8cbb377fe Mon Sep 17 00:00:00 2001
From: wukong <wukong@longaeva>
Date: Sat, 9 May 2026 14:14:18 -0700
Subject: 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;

---
 em.awk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'em.awk')

diff --git a/em.awk b/em.awk
index 2cc6a74..be84054 100644
--- a/em.awk
+++ b/em.awk
@@ -8,7 +8,7 @@ BEGIN {
     ARGV[1] ? OFMT = "%." ARGV[1] "g" : OFMT = "%.12g"
 
     # constants
-    pi = 4.0*atan2(1,1)         # rad
+    pi = 4.0*atan2(1.0,1.0)     # rad
     c0 = 299792458E0            # m/s, exact
     mu0 = (4.0E-7)*pi           # H/m = (T*m)/A = N/(A^2) = (kg*m)/(A*s)
     epsilon0 = (mu0*c0^2)^-1    # F/m = C/(V*m) = (A^2*s^4)/(kg*m^3)
-- 
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