From 4c4eb1bd8f003b3b57707badd2dd089ed193a896 Mon Sep 17 00:00:00 2001
From: wukong <wukong@longaeva>
Date: Fri, 10 Apr 2026 23:46:12 -0700
Subject: renamed fir window generators; minor edits to whitespace and comments
 for more consistent style;

---
 lpf.awk | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

(limited to 'lpf.awk')

diff --git a/lpf.awk b/lpf.awk
index aba92e1..638af3c 100644
--- a/lpf.awk
+++ b/lpf.awk
@@ -1,7 +1,8 @@
 #!/usr/bin/awk -f
 
 ### lpf.awk
-# Low Pass Filter with Hardcoded FIR Window
+# low pass filter with hardcoded FIR window
+
 
 BEGIN {
     OFS = FS
@@ -20,19 +21,22 @@ BEGIN {
     window_size = split(H, H_arr, "[ ]*")
 }
 
+
+# column headers
 NR == 1 {
     for (y=1; y<=NF; y++)
         ($y ~ number) ? header[y] = "col" y : header[y] = $y
 }
 
+
+# read input data
 NF > 0 {
-    if (NF > nf_max)
-        nf_max = NF
+    (NF > nf_max) ? nf_max = NF : nf_max = nf_max
 
     input_size = window_size
     output_size = (input_size + window_size - 1)
 
-    ### columns
+    # columns
     for (y=1; y<=nf_max; y++) {
         if ($y == header[y])
             printf(header[y] OFS header[y] "_lpf")
@@ -75,15 +79,13 @@ NF > 0 {
             printf(ORS)
 
     }
-
-
-
 }
 
+
 END {
-    ### rows
+    # rows
     for (x=1; x<=window_size; x++) {
-        ### columns
+        # columns
         for (y=1; y<=nf_max; y++) {
             # rotate input buffer
             for (n=1; n<=input_size; n++) {
@@ -93,7 +95,7 @@ END {
             #delete X_arr[y,input_size]
             #input_size = length(X_arr)
             #print length(X_arr)
-            
+
             Y[y] = 0
             for (n=1; n<=window_size; n++) {
                 for (m=1; m<=input_size; m++) {
@@ -120,7 +122,7 @@ END {
                 printf(OFS)
             else
                 printf(ORS)
-            X_arr[input_size] = 0 
+            X_arr[input_size] = 0
         }
     }
 }
-- 
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