From bb6cca900485dd65e7228efe11af3c4e890fd6f5 Mon Sep 17 00:00:00 2001
From: Magnus Ulimoen <flymagnus@gmail.com>
Date: Fri, 8 Nov 2019 20:03:44 +0100
Subject: [PATCH] fix assignment

---
 src/operators/upwind4.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/operators/upwind4.rs b/src/operators/upwind4.rs
index d4a4a22..2dfc9b8 100644
--- a/src/operators/upwind4.rs
+++ b/src/operators/upwind4.rs
@@ -66,7 +66,7 @@ impl Upwind4 {
         let first_elems = prev.slice(s!(..7));
         for (bl, f) in block.outer_iter().zip(&mut fut) {
             let diff = first_elems.dot(&bl);
-            *f = diff * idx;
+            *f += diff * idx;
         }
 
         for (window, f) in prev