diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 514ce69..6602e3e 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -53,8 +53,8 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "04. Programming/Machine Learning.md",
-                "mode": "preview",
+                "file": "04. Programming/Python/matplotlib.md",
+                "mode": "source",
                 "source": true
               }
             }
@@ -126,7 +126,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "04. Programming/Machine Learning.md",
+                "file": "04. Programming/Python/matplotlib.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -151,7 +151,7 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "04. Programming/Machine Learning.md"
+                "file": "04. Programming/Python/matplotlib.md"
               }
             }
           },
@@ -204,8 +204,8 @@
   },
   "active": "1f1e98d771d9e088",
   "lastOpenFiles": [
-    "05. 資料收集/讀書筆記/20230206 - 卡片盒筆記.md",
     "04. Programming/Machine Learning.md",
+    "05. 資料收集/讀書筆記/20230206 - 卡片盒筆記.md",
     "05. 資料收集/核心肌群訓練.md",
     "05. 資料收集/Capture One.md",
     "05. 資料收集/AI.md",
diff --git a/04. Programming/Python/matplotlib.md b/04. Programming/Python/matplotlib.md
index 2f5b31e..a09ca41 100644
--- a/04. Programming/Python/matplotlib.md	
+++ b/04. Programming/Python/matplotlib.md	
@@ -22,6 +22,19 @@ plt.xlabel(
 plt.gca().axes.get_xaxis().set_visible(False)
 ```
 
+## 畫2張圖
+```python
+figure, axis = plt.subplots(2, 2)
+```
+用 `plt.subplots()` 來指定要畫幾張圖，第一個參數是x軸的數量，第二個參數是y軸的數量
+`axis` 會是一個 array，可以用類似座標的方式來控制你要的圖，例如：
+```python
+axis[0, 0].set_title("Sine Function")
+axis[0, 1].set_title("Cosine Function")
+```
+
+`figure` 則是指外圍的大圖。
+
 ## 畫2條線
 ```python
 plt.plot(x, y1, label='sine curve',color='b')