add

_data/navigation.yml

@@ -9,17 +9,33 @@
 #   - title: "Sitemap"
 #     url: /sitemap/
 categories_:
-  - title: Title1
+  - title: Machine Learning
     children:
-      - title: "Categories1"
-        url: /categories/categories1
+      - title: "RL"
+        url: /categories/ROS
+      - title: "Classification"
+        url: /categories/Classification
 
-  - title: Title2
+  - title: Robotics
     children:
-      - title: "Categories2"
-        url: /categories/categories2/
+      - title: "ROS"
+        url: /categories/ROS
+      - title: "EV3"
+        url: /categories/EV3
+      - title: "Deepracer"
+        url: /categories/Deepracer
+
 
-  - title: Title3
+  - title: Electronic Engineering
     children:
-      - title: "Categories3"
-        url: /categories/categories3/
+      - title: "전자기학"
+        url: /categories/categories1
+      - title: "전자회로"
+        url: /categories/categories2
+      - title: "회로이론"
+        url: /categories/categories3
+      - title: "논리회로"
+        url: /categories/categories4
+      - title: "신호와시스템"
+        url: /categories/categories5
+      - title: "C언어"

_includes/sidebar.html

@@ -14,10 +14,6 @@
     {% if page.sidebar.nav %}
       {% include nav_list nav=page.sidebar.nav %}
     {% endif %}
-
-    {% if page.sidebar_main %}
-      {% include nav_list_main %}
-    {% endif %}
   {% endif %}
   </div>
 {% endif %}

_posts/2023-08-14-first.md

@@ -2,8 +2,6 @@
 title:  "첫 포스팅입니다"
 published: true
 author_profile: true
-sidebar:
-  nav: "main"
 categories:
   - categories1
 ---

index.html

@@ -1,6 +1,7 @@
 ---
 layout: home
 author_profile: true
-
+sidebar:
+  nav: "categories_"
 ---