From 64d8f54c34b8cdacd32274ca74aca7bfb639e0f6 Mon Sep 17 00:00:00 2001
From: yunhui <38786521+CloudyDory@users.noreply.github.com>
Date: Thu, 22 Feb 2024 22:56:23 +0800
Subject: [PATCH] Fix delayvar not correct in concat mode (#632)

---
 brainpy/_src/math/delayvars.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/brainpy/_src/math/delayvars.py b/brainpy/_src/math/delayvars.py
index 390e04dd..676e4286 100644
--- a/brainpy/_src/math/delayvars.py
+++ b/brainpy/_src/math/delayvars.py
@@ -473,7 +473,7 @@ def update(self, value: Union[numbers.Number, Array, jax.Array] = None):
 
     elif self.update_method == CONCAT_UPDATE:
       if self.num_delay_step >= 2:
-        self.data.value = concatenate([expand_dims(value, 0), self.data[1:]], axis=0)
+        self.data.value = concatenate([expand_dims(value, 0), self.data[:-1]], axis=0)
       else:
         self.data[:] = value