1 files changed, 14 insertions, 9 deletions

diff --git a/cov.awk b/cov.awk
index c06a447..92e92a8 100644
--- a/cov.awk
+++ b/cov.awk
@@ -3,6 +3,7 @@
 ### cov.awk
 # online covariance algorithm
 
+
 BEGIN {
     OFS = FS
     sign = "[+-]?"
@@ -12,18 +13,20 @@ BEGIN {
     number = "^" sign "(" decimal "|" fraction ")" exponent "$"
 }
 
+
+# column headers
 NR == 1 {
-    for (y=1; y<=NF; y++)
-        ($y ~ number) ? header[y] = "col" y : header[y] = $y
+    for (n=1; n<=NF; n++)
+        ($n ~ number) ? header[n] = "col" n : header[n] = $n
 }
 
+
 NF > 0 {
-    if (NF > nf_max)
-        nf_max = NF
+    (NF > nf_max) ? nf_max = NF : nf_max = nf_max
 
-    ### columns
+    # columns
     for (y=1; y<=nf_max; y++) {
-        ### rows
+        # rows
         for (x=1; x<=nf_max; x++) {
             if ($x !~ number || $x == header[x])
                 continue
@@ -39,18 +42,19 @@ NF > 0 {
     }
 }
 
+
 END {
-    ### column headers
+    # column headers
     printf("cov")
     for (y=1; y<=nf_max; y++) {
         printf(OFS header[y])
     }
     printf(ORS)
 
-    ### columns
+    # columns
     for (y=1; y<=nf_max; y++) {
         printf(header[y] OFS)
-        ### rows
+        # rows
         for (x=1; x<=nf_max; x++) {
             printf(OFMT, cov_samp[x,y])
             if (x < nf_max)
@@ -59,3 +63,4 @@ END {
         printf(ORS)
     }
 }
+