From 96e7efe4312240b6be73ddb20b89a2a560a1508d Mon Sep 17 00:00:00 2001
From: hugen79 <hugen@outlook.com>
Date: Wed, 8 Jan 2020 22:34:34 +0800
Subject: [PATCH] Fixed incorrect drawing after displaying absolute value in
 linear format.

---
 plot.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/plot.c b/plot.c
index 08af120..ab2670c 100644
--- a/plot.c
+++ b/plot.c
@@ -529,7 +529,7 @@ static uint32_t trace_into_index(
     v = refpos - group_delay(coeff, freq, point_count, i) * scale;
     break;
   case TRC_LINEAR:
-    v = refpos + linear(coeff[i]) * scale;
+    v = refpos - linear(coeff[i]) * scale;
     break;
   case TRC_SWR:
     v = refpos+ (1 - swr(coeff[i])) * scale;