diff --git a/README.md b/README.md
index 17a5fee..938e416 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,12 @@
   <img src="https://github.com/MachineLearning100/100-Days-Of-ML-Code/blob/master/Info-graphs/Day%203.png">
 </p>
 
+## 逻辑回归 | 第4天
+
+<p align="center">
+  <img src="https://github.com/MachineLearning100/100-Days-Of-ML-Code/blob/master/Info-graphs/Day%204.jpg">
+</p>
+
 
 ## 支持向量机(SVM) | 第12天