added shebang, replaced if-elses with shortcut notation, ported online mean and variance calc to mean.awk

1 files changed, 5 insertions, 4 deletions

diff --git a/sum4.awk b/sum4.awk
index c592409..518f6e5 100644
--- a/sum4.awk
+++ b/sum4.awk
@@ -1,3 +1,5 @@
+#!/usr/bin/awk -f
+
 ### sum4.awk, print sums of numeric columns
 # input:    rows of integers and strings
 # output:   sums of numeric columns
@@ -12,7 +14,7 @@ function isnum(n) {
 }
 
 NR==1 {
-    nfldz = NF
+    nf_max = NF
     for (i=1; i<=NF; i++) {
         if (!isnum($i))
             header[i] = $i
@@ -27,11 +29,10 @@ NR==1 {
 }
 
 END {
-    for (i=1; i<=nfldz; i++) {
+    for (i=1; i<=nf_max; i++) {
         if (header[i])
             printf("%s: \t", header[i])
-        #if (numcol[i])
         printf("%g\n", sum[i])
-        printf(i < nfldz ? "" : "\n")
+        printf(i < nf_max ? "" : "\n")
     }
 }