From c808c6d4e4667a1fe79b72d4452270b7fb8e3372 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20K=C3=A4berich?= <j.kaeberich@gmx.de>
Date: Sun, 18 May 2025 12:54:50 +0200
Subject: [PATCH] allow variable x when checking if from math formula is valid

---
 Software/PC_Application/LibreVNA-GUI/Traces/trace.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Software/PC_Application/LibreVNA-GUI/Traces/trace.cpp b/Software/PC_Application/LibreVNA-GUI/Traces/trace.cpp
index 40b1761..74c4235 100644
--- a/Software/PC_Application/LibreVNA-GUI/Traces/trace.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/Traces/trace.cpp
@@ -427,6 +427,9 @@ QString Trace::getMathFormulaError() const
                     break;
                 }
             }
+            if(varName == "x") {
+                found = true;
+            }
             if(!found) {
                 return "Unknown variable: "+varName;
             }