From 757fd1df6bdd8287d2cfcec834c1de30713617d3 Mon Sep 17 00:00:00 2001
From: PhilippPlank <32519998+PhilippPlank@users.noreply.github.com>
Date: Tue, 16 May 2023 17:40:34 +0200
Subject: [PATCH] Update models.py

---
 src/lava/proc/sparse/models.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lava/proc/sparse/models.py b/src/lava/proc/sparse/models.py
index 9ae3b0050..75bd43206 100644
--- a/src/lava/proc/sparse/models.py
+++ b/src/lava/proc/sparse/models.py
@@ -245,6 +245,9 @@ def get_delay_wgts_mat(weights, delays) -> spmatrix:
         weights.
         """
         # Can only start at 1, as delays==0 raises inefficiency warning
+        if np.max(delays) == 0:
+            return weights
+
         weight_delay_from_1 = vstack([weights.multiply(delays == k)
                                       for k in range(1, np.max(delays) + 1)])
         # Create weight matrix at delays == 0