From 898f9b87858bf54d49c0ef6db57341b9ae90bb28 Mon Sep 17 00:00:00 2001
From: Xiao Pan <xyz@flylightning.xyz>
Date: Tue, 12 Nov 2024 14:32:52 -0800
Subject: il option to input scale and better comment about usage

---
 sh/il | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'sh')

diff --git a/sh/il b/sh/il
index 7c75a71..7741695 100755
--- a/sh/il
+++ b/sh/il
@@ -1,6 +1,6 @@
 #!/bin/sh
 # InterpoLation
 
-# x=$1, xa=$2, xb=$3, ya=$4, yb=$5
+# y=?, x=$1, xa=$2, xb=$3, ya=$4, yb=$5, scale=$6
 # https://en.wikipedia.org/wiki/Interpolation#Linear_interpolation
-echo "scale=4;$4+($5-$4)*($1-$2)/($3-$2)" | bc
+echo "scale=${6:-4};$4+($5-$4)*($1-$2)/($3-$2)" | bc
-- 
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