vault backup: 2023-10-15 16:08:26

.obsidian/app.json

@@ -1,7 +1,7 @@
 {
   "promptDelete": false,
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+  "attachmentFolderPath": "./assets/矩阵求导",
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   "useMarkdownLinks": true,

.obsidian/workspace.json

@@ -13,7 +13,7 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "Books/动手学深度学习/基础概念.md",
+                "file": "Study/DL/吴恩达深度学习课程/矩阵求导.md",
                 "mode": "source",
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@@ -94,7 +94,7 @@
             "state": {
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               "state": {
-                "file": "Books/动手学深度学习/基础概念.md",
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@@ -111,7 +111,7 @@
             "state": {
               "type": "outgoing-link",
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-                "file": "Books/动手学深度学习/基础概念.md",
+                "file": "Study/DL/吴恩达深度学习课程/矩阵求导.md",
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@@ -134,7 +134,7 @@
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-                "file": "Books/动手学深度学习/基础概念.md"
+                "file": "Study/DL/吴恩达深度学习课程/矩阵求导.md"
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@@ -167,8 +167,12 @@
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   "lastOpenFiles": [
-    "Books/动手学深度学习/引言.md",
     "Books/动手学深度学习/基础概念.md",
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+    "Study/DL",
+    "Study",
+    "Study/DL/吴恩达深度学习课程",
+    "Books/动手学深度学习/引言.md",
     "Books/Java Guide/基础语法.md",
     "Books/Java并发编程/Java并发编程.md",
     "Books/从零开始深入学习Spring/IoC.md",

Study/DL/吴恩达深度学习课程/矩阵求导.md

@@ -0,0 +1,16 @@
+## 概念
+标量函数：输出为标量的函数
+$$
+f(x) = x^2
+$$
+向量函数：输出为向量/矩阵/张量的函数
+$$
+f(x) = 
+\left[ \begin{matrix}
+x & x^2 \\
+x^3 & x^4
+\end{matrix} \right]
+$$
+$$
+$$
+## 本质