From 723b3864183efa8031eb7bccde910fc3fd689f44 Mon Sep 17 00:00:00 2001
From: shataowei <taowei.sha@ymm56.com>
Date: Mon, 18 Nov 2019 19:04:41 +0800
Subject: [PATCH] =?UTF-8?q?=E9=9A=8F=E6=9C=BA=E6=A3=AE=E6=9E=97=E7=AF=87?=
 =?UTF-8?q?=E5=B9=85?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .idea/workspace.xml                           | 80 +++++++++++++++----
 README.md                                     |  8 ++
 .../\350\264\235\345\217\266\346\226\257.md"  |  4 +-
 ...17\346\234\272\346\243\256\346\236\227.md" | 17 ++++
 4 files changed, 91 insertions(+), 18 deletions(-)
 create mode 100644 "\346\234\272\345\231\250\345\255\246\344\271\240/\351\232\217\346\234\272\346\243\256\346\236\227/\351\232\217\346\234\272\346\243\256\346\236\227.md"

diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 610a90e..cad5f5c 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,9 +2,10 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="be5bf74e-ad1c-4197-8a1f-ac93566d8aa7" name="Default" comment="init">
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/机器学习/贝叶斯/贝叶斯.md" />
+      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/机器学习/随机森林/随机森林.md" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/README.md" afterPath="$PROJECT_DIR$/README.md" />
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/机器学习/贝叶斯/贝叶斯.md" afterPath="$PROJECT_DIR$/机器学习/贝叶斯/贝叶斯.md" />
     </list>
     <ignored path="Reflection_Summary.iws" />
     <ignored path=".idea/workspace.xml" />
@@ -38,8 +39,8 @@
           </provider>
           <provider selected="true" editor-type-id="split-provider[text-editor;MarkdownPreviewEditor]">
             <state split_layout="SPLIT">
-              <first_editor relative-caret-position="415">
-                <caret line="188" column="5" selection-start-line="188" selection-start-column="2" selection-end-line="188" selection-end-column="5" />
+              <first_editor relative-caret-position="250">
+                <caret line="196" column="4" selection-start-line="196" selection-start-column="4" selection-end-line="196" selection-end-column="39" />
                 <folding />
               </first_editor>
               <second_editor>
@@ -49,12 +50,36 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="贝叶斯.md" pinned="false" current-in-tab="true">
+      <file leaf-file-name="随机森林.md" pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/机器学习/随机森林/随机森林.md">
+          <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
+            <state split_layout="SPLIT">
+              <first_editor relative-caret-position="195">
+                <caret line="13" column="0" selection-start-line="13" selection-start-column="0" selection-end-line="13" selection-end-column="0" />
+                <folding />
+              </first_editor>
+              <second_editor />
+            </state>
+          </provider>
+          <provider editor-type-id="split-provider[text-editor;MarkdownPreviewEditor]">
+            <state split_layout="SPLIT">
+              <first_editor relative-caret-position="0">
+                <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+                <folding />
+              </first_editor>
+              <second_editor>
+                <js_state />
+              </second_editor>
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="贝叶斯.md" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/机器学习/贝叶斯/贝叶斯.md">
           <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
             <state split_layout="SPLIT">
-              <first_editor relative-caret-position="435">
-                <caret line="29" column="0" selection-start-line="29" selection-start-column="0" selection-end-line="29" selection-end-column="0" />
+              <first_editor relative-caret-position="375">
+                <caret line="25" column="14" selection-start-line="25" selection-start-column="2" selection-end-line="25" selection-end-column="14" />
                 <folding />
               </first_editor>
               <second_editor />
@@ -111,8 +136,9 @@
         <option value="$PROJECT_DIR$/数学/概率论/概率论.md" />
         <option value="$PROJECT_DIR$/基础概念/频率概率/频率概率.md" />
         <option value="$PROJECT_DIR$/机器学习/决策树/决策树.md" />
-        <option value="$PROJECT_DIR$/README.md" />
         <option value="$PROJECT_DIR$/机器学习/贝叶斯/贝叶斯.md" />
+        <option value="$PROJECT_DIR$/机器学习/随机森林/随机森林.md" />
+        <option value="$PROJECT_DIR$/README.md" />
       </list>
     </option>
   </component>
@@ -222,6 +248,10 @@
               <option name="myItemId" value="机器学习" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="随机森林" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
           </PATH>
           <PATH>
             <PATH_ELEMENT>
@@ -236,10 +266,6 @@
               <option name="myItemId" value="机器学习" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="贝叶斯" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
           </PATH>
         </subPane>
       </pane>
@@ -1292,6 +1318,28 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/机器学习/贝叶斯/贝叶斯.md">
+      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
+        <state split_layout="SPLIT">
+          <first_editor relative-caret-position="375">
+            <caret line="25" column="14" selection-start-line="25" selection-start-column="2" selection-end-line="25" selection-end-column="14" />
+            <folding />
+          </first_editor>
+          <second_editor />
+        </state>
+      </provider>
+      <provider editor-type-id="split-provider[text-editor;MarkdownPreviewEditor]">
+        <state split_layout="SPLIT">
+          <first_editor relative-caret-position="0">
+            <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
+            <folding />
+          </first_editor>
+          <second_editor>
+            <js_state />
+          </second_editor>
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/README.md">
       <provider editor-type-id="split-provider[text-editor;markdown-preview-editor]">
         <state split_layout="SPLIT">
@@ -1304,8 +1352,8 @@
       </provider>
       <provider selected="true" editor-type-id="split-provider[text-editor;MarkdownPreviewEditor]">
         <state split_layout="SPLIT">
-          <first_editor relative-caret-position="415">
-            <caret line="188" column="5" selection-start-line="188" selection-start-column="2" selection-end-line="188" selection-end-column="5" />
+          <first_editor relative-caret-position="250">
+            <caret line="196" column="4" selection-start-line="196" selection-start-column="4" selection-end-line="196" selection-end-column="39" />
             <folding />
           </first_editor>
           <second_editor>
@@ -1314,11 +1362,11 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/机器学习/贝叶斯/贝叶斯.md">
+    <entry file="file://$PROJECT_DIR$/机器学习/随机森林/随机森林.md">
       <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
         <state split_layout="SPLIT">
-          <first_editor relative-caret-position="435">
-            <caret line="29" column="0" selection-start-line="29" selection-start-column="0" selection-end-line="29" selection-end-column="0" />
+          <first_editor relative-caret-position="195">
+            <caret line="13" column="0" selection-start-line="13" selection-start-column="0" selection-end-line="13" selection-end-column="0" />
             <folding />
           </first_editor>
           <second_editor />
diff --git a/README.md b/README.md
index 151e903..14480c4 100644
--- a/README.md
+++ b/README.md
@@ -187,6 +187,14 @@
     - [树形结构为何不需要归一化](机器学习/决策树/决策树.md#L164)
     - [决策树的优缺点](机器学习/决策树/决策树.md#L164)
 - 贝叶斯
+    - [解释一下朴素贝叶斯中考虑到的条件独立假设](机器学习/贝叶斯/贝叶斯.md#L164)
+    - [讲一讲你眼中的贝叶斯公式和朴素贝叶斯分类差别](机器学习/贝叶斯/贝叶斯.md#L164)
+    - [朴素贝叶斯中出现的常见模型有哪些](机器学习/贝叶斯/贝叶斯.md#L164)
+    - [出现估计概率值为 0 怎么处理](机器学习/贝叶斯/贝叶斯.md#L164)
+    - [朴素贝叶斯的优缺点](机器学习/贝叶斯/贝叶斯.md#L164)
+    - [朴素贝叶斯与 LR 区别](机器学习/贝叶斯/贝叶斯.md#L164)
+- 随机森林
+    - [解释下随机森林](机器学习/随机森林/随机森林.md#L164)
 - GBDT
 - FM/FFM
 - SVM
diff --git "a/\346\234\272\345\231\250\345\255\246\344\271\240/\350\264\235\345\217\266\346\226\257/\350\264\235\345\217\266\346\226\257.md" "b/\346\234\272\345\231\250\345\255\246\344\271\240/\350\264\235\345\217\266\346\226\257/\350\264\235\345\217\266\346\226\257.md"
index aca9639..f938085 100644
--- "a/\346\234\272\345\231\250\345\255\246\344\271\240/\350\264\235\345\217\266\346\226\257/\350\264\235\345\217\266\346\226\257.md"
+++ "b/\346\234\272\345\231\250\345\255\246\344\271\240/\350\264\235\345\217\266\346\226\257/\350\264\235\345\217\266\346\226\257.md"
@@ -1,12 +1,12 @@
 # 解释一下朴素贝叶斯中考虑到的条件独立假设
 ![](https://tva1.sinaimg.cn/large/006y8mN6gy1g92b15s6daj308x00rq2s.jpg)
 
-# 讲一讲你眼中的贝叶斯公式和朴素贝叶斯分类
+# 讲一讲你眼中的贝叶斯公式和朴素贝叶斯分类差别
 贝叶斯公式是完整的数学公式P(A/B) = P(A)P(B/A)/P(B)
 
 朴素贝叶斯 = 贝叶斯公式 + 条件独立假设，在实际使用过程中，朴素贝叶斯完全只需要关注P(A,B)=P(A)P(B/A)即可
 
-# 朴素贝叶斯中出现的常见模型
+# 朴素贝叶斯中出现的常见模型有哪些
 - 多项式：多项式模型适用于离散特征情况，在文本领域应用广泛， 其基本思想是：我们将重复的词语视为其出现多次
     - 因为统计次数，所以会出现0次可能，所以实际中进行了平滑操作
         - 先验平滑：![](https://tva1.sinaimg.cn/large/006y8mN6gy1g92bmactdlj303o0133yb.jpg)
diff --git "a/\346\234\272\345\231\250\345\255\246\344\271\240/\351\232\217\346\234\272\346\243\256\346\236\227/\351\232\217\346\234\272\346\243\256\346\236\227.md" "b/\346\234\272\345\231\250\345\255\246\344\271\240/\351\232\217\346\234\272\346\243\256\346\236\227/\351\232\217\346\234\272\346\243\256\346\236\227.md"
new file mode 100644
index 0000000..96f3cc3
--- /dev/null
+++ "b/\346\234\272\345\231\250\345\255\246\344\271\240/\351\232\217\346\234\272\346\243\256\346\236\227/\351\232\217\346\234\272\346\243\256\346\236\227.md"
@@ -0,0 +1,17 @@
+# 解释下随机森林?
+- 随机森林=bagging+决策树
+- 随机：特征选择随机+数据采样随机
+    - 特征随机是在决策树每个结点上选择的时候随机，并不是在每棵树创建的时候随机
+    - 每个结点上对特征选择都是从全量特征中进行采样对，不会剔除已利用对
+    - 数据采样，是有放回的采样
+        - 1个样本**未被选到**的概率为p = (1 - 1/N)^N = 1/e，即为OOB
+- 森林：多决策树组合
+    - 可分类可回归，回归是对输出值进行简单平均，分类是对输出值进行简单投票
+
+# 解释下随机森林节点的分裂策略？
+
+# 随机森林的损失函数是什么？
+
+# 为了防止随机森林过拟合可以怎么做?
+
+# 是否用过随机森林，怎么用的?