From c46b3275a9db7fd8f00ab482fcd5376c36fb6db9 Mon Sep 17 00:00:00 2001
From: Jakob Ketterl <jakob.ketterl@gmx.de>
Date: Mon, 17 May 2021 15:08:44 +0200
Subject: [PATCH] allow negative frequencies in exponential display, closes
 #247

---
 htdocs/lib/settings/ExponentialInput.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/htdocs/lib/settings/ExponentialInput.js b/htdocs/lib/settings/ExponentialInput.js
index 603651d..5f7e99f 100644
--- a/htdocs/lib/settings/ExponentialInput.js
+++ b/htdocs/lib/settings/ExponentialInput.js
@@ -38,7 +38,7 @@ $.fn.exponentialInput = function() {
         // calculate initial exponent
         var value = parseFloat($input.val());
         if (!Number.isNaN(value)) {
-            $exponent.val(Math.floor(Math.log10(value) / 3) * 3);
+            $exponent.val(Math.floor(Math.log10(Math.abs(value)) / 3) * 3);
             setExponent();
         }
     })