1 files changed, 2 insertions, 0 deletions
diff --git a/diff1.awk b/diff1.awk
index 1032659..e5e8fea 100644
--- a/diff1.awk
+++ b/diff1.awk
@@ -27,10 +27,12 @@ NF != 0 {
     ### iterate over columns
     for (y=1; y<=max_nf; y++) {
         if ($y ~ number) {
+
             data[y] = $y
             diff[y] = data[y] - data_prev[y]
             printf("%g,", diff[y])
             data_prev[y] = data[y]
+
         }
     }
     printf("\n")