1 files changed, 2 insertions, 2 deletions
diff --git a/kalman.awk b/kalman.awk
index 9eb6f79..18279b1 100644
--- a/kalman.awk
+++ b/kalman.awk
@@ -15,7 +15,7 @@ NR == 1 {
         if ($n !~ number)
             header[n] = $n
         else
-            header[n] = n
+            header[n] = "col_" n
     }
 }
 
@@ -25,7 +25,7 @@ NF != 0 {
         max_nf = NF
 
     ### iterate over columns
-    for (y=1; y<= NF; y++) {
+    for (y=1; y<=max_nf; y++) {
         if ($y ~ number) {
 
             ### mean