From eee28caa3516eaa9b8deed982e18d189a8640c0b Mon Sep 17 00:00:00 2001
From: Stella <30465823+stellaprins@users.noreply.github.com>
Date: Fri, 18 Jul 2025 15:52:38 +0100
Subject: [PATCH] fix alpha_power input checking bug

`medium.alpha_coeff` was incorrectly checked instead of `medium.alpha_power`.

Thanks to @cldonovan for spotting the issue and suggesting the correct fix!
---
 k-Wave/private/kspaceFirstOrder_inputChecking.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/k-Wave/private/kspaceFirstOrder_inputChecking.m b/k-Wave/private/kspaceFirstOrder_inputChecking.m
index 20ebb6d..bc63619 100644
--- a/k-Wave/private/kspaceFirstOrder_inputChecking.m
+++ b/k-Wave/private/kspaceFirstOrder_inputChecking.m
@@ -213,7 +213,7 @@
         end
 
         % check y is real and within 0 to 3
-        if ~isreal(medium.alpha_coeff) || (medium.alpha_power >= 3 || medium.alpha_power < 0)
+        if ~isreal(medium.alpha_power) || (medium.alpha_power >= 3 || medium.alpha_power < 0)
             error('medium.alpha_power must be a real number between 0 and 3.');
         end