From 0637c17d1b11ae82da736551791fd449157290e4 Mon Sep 17 00:00:00 2001
From: baiyi <421586319@qq.com>
Date: Mon, 4 Sep 2023 11:48:27 +0800
Subject: [PATCH] update readme

---
 README.md | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 7be6940..20a0d34 100644
--- a/README.md
+++ b/README.md
@@ -34,8 +34,7 @@ idx=(length(ck)-1)÷2+1
 W=MathieuWron(nu,ck,idx)
 ```
 In some cases, `W` could be negative. One can replace `nu` with `-nu` and reverse `ck`, i.e., `reverse!(ck)`, to get a positive `W`.
-If one prefers a positive `nu`, one can further shift `nu` with `nu+=2`. 
-In this case, `idx` should be `idx+=1`.
+If one prefers a positive `nu`, one can further shift `nu` with `nu+=2` and `idx` with `idx+=1`.
 Code example:
 ```julia
 nu=2-nu