From 0c1d68ee8cc2a631d6029285e771ebbfe119995d Mon Sep 17 00:00:00 2001
From: wukong <wukong@longaeva>
Date: Sat, 7 Dec 2019 15:02:59 -0800
Subject: code formatting changes to lin_reg scripts; added range to output of
 mean scripts;

---
 mean.awk | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

(limited to 'mean.awk')

diff --git a/mean.awk b/mean.awk
index 754acfe..069db4c 100644
--- a/mean.awk
+++ b/mean.awk
@@ -5,20 +5,21 @@
 
 BEGIN {
     OFS = FS
-    sign = "[+-]?"
-    decimal = "[0-9]+[.]?[0-9]*"
-    fraction = "[.][0-9]+"
-    exponent = "([Ee]" sign "[0-9]+)?"
-    number = "^" sign "(" decimal "|" fraction ")" exponent "$"
+    #sign = "[+-]?"
+    #decimal = "[0-9]+[.]?[0-9]*"
+    #fraction = "[.][0-9]*"
+    #exponent = "([Ee]" "[+-]?" "[0-9]+)?"
+    number = "^[+-]?([0-9]+[.]?[0-9]*|[.][0-9]*)([Ee][+-]?[0-9]+)?$"
 }
 
 # Welford's 'online' algorithm for variance
-NF > 0 {
+NF {
     for (n=1; n<=NF; n++) {
         if ($n ~ number) {
             count += 1
             (count == 1 || $n < min) ? min = $n : min = min
             (count == 1 || $n > max) ? max = $n : max = max
+            range = max - min
             delta0 = $n - mean
             mean += delta0/count
             delta1 = $n - mean
@@ -29,7 +30,7 @@ NF > 0 {
 }
 
 END {
-    print "mean", "std_err", "std_dev", "min", "max", "total", "count"
-    print mean, sqrt(var/count), sqrt(var), min, max, (mean*count), count
+    print "mean", "std_err", "std_dev", "range", "min", "max", "total", "count"
+    print mean, sqrt(var/count), sqrt(var), range, min, max, (mean*count), count
 }
 
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