1 files changed, 10 insertions, 4 deletions
diff --git a/det.awk b/det.awk
index b3e5c1f..e83a9ea 100644
--- a/det.awk
+++ b/det.awk
@@ -5,6 +5,7 @@
 # input: square array as delimited text
 # output: (scalar) determinant
 
+
 BEGIN {
     OFS = "\t"
     sign = "[+-]?"
@@ -14,17 +15,21 @@ 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
 }
 
+
+# read input data
 NF > 0 {
     (NF > nf_max) ? nf_max = NF : nf_max = nf_max
 
-    ### columns
+    # columns
     for (y=1; y<=nf_max; y++) {
-        ### rows
+        # rows
         if ($y !~ number) {
             continue
         }
@@ -36,12 +41,13 @@ NF > 0 {
     }
 }
 
+
 END {
     print length(row_sum), length(col_sum)
-    ### columns
+    # columns
     for (y=1; y<=nf_max; y++) {
         if (y in col_sum) {
-            ### rows
+            # rows
             for (x=1; x<=NR; x++) {
                 if (x in row_sum) {
                     printf("[" OFMT "," OFMT "]" OFS OFMT OFS OFMT,