From 6387ccbf40b3fead4543571f1c6f8b10c4c6714f Mon Sep 17 00:00:00 2001 From: jackfrued Date: Sun, 4 Oct 2020 08:58:07 +0800 Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=E4=BA=86=E9=83=A8=E5=88=86?= =?UTF-8?q?=E6=96=87=E6=A1=A3?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- ...246\344\271\240\346\246\202\350\277\260.md" | 9 ++++++++- ...221\351\202\273\345\210\206\347\261\273.md" | 17 +++++++++++++++++ Day71-80/res/scikit-learn-logo.png | Bin 0 -> 8053 bytes README.md | 2 +- 4 files changed, 26 insertions(+), 2 deletions(-) create mode 100644 Day71-80/res/scikit-learn-logo.png diff --git "a/Day71-80/71.\344\272\272\345\267\245\346\231\272\350\203\275\345\222\214\346\234\272\345\231\250\345\255\246\344\271\240\346\246\202\350\277\260.md" "b/Day71-80/71.\344\272\272\345\267\245\346\231\272\350\203\275\345\222\214\346\234\272\345\231\250\345\255\246\344\271\240\346\246\202\350\277\260.md" index 12ee4e5..3241f6f 100644 --- "a/Day71-80/71.\344\272\272\345\267\245\346\231\272\350\203\275\345\222\214\346\234\272\345\231\250\345\255\246\344\271\240\346\246\202\350\277\260.md" +++ "b/Day71-80/71.\344\272\272\345\267\245\346\231\272\350\203\275\345\222\214\346\234\272\345\231\250\345\255\246\344\271\240\346\246\202\350\277\260.md" @@ -119,5 +119,12 @@ $$ 5. 测试算法 6. 应用算法 -### +### Scikit-learn介绍 +![](res/scikit-learn-logo.png) + +Scikit-learn源于Google Summer of Code项目,由David Cournapeau在2007年发起,它提供了机器学习可能用到的工具,包括数据预处理、监督学习(分类、回归)、非监督学习(聚类)、模型选择、降维等。 + +官网地址: + +安装方法:`pip install scikit-learn` \ No newline at end of file diff --git "a/Day71-80/72.k\346\234\200\350\277\221\351\202\273\345\210\206\347\261\273.md" "b/Day71-80/72.k\346\234\200\350\277\221\351\202\273\345\210\206\347\261\273.md" index d880d22..b609070 100644 --- "a/Day71-80/72.k\346\234\200\350\277\221\351\202\273\345\210\206\347\261\273.md" +++ "b/Day71-80/72.k\346\234\200\350\277\221\351\202\273\345\210\206\347\261\273.md" @@ -20,3 +20,20 @@ k值的选择对于kNN算法的结果有非常显著的影响。下面用李航 实际应用中,$k$的取值通常都比较小,可以通过交叉检验的方式来选择较好的$k$值。 + + +### 算法优缺点 + +优点: + +1. 简单有效 +2. 重新训练代价低 +3. 适合类域交叉样本 +4. 适合大样本分类 + +缺点: + +1. 惰性学习 +2. 输出的可解释性不强 +3. 不擅长处理不均衡样本 +4. 计算量比较大 \ No newline at end of file diff --git a/Day71-80/res/scikit-learn-logo.png b/Day71-80/res/scikit-learn-logo.png new file mode 100644 index 0000000000000000000000000000000000000000..ce1e1056c66a60373cd5d9469def66e5b400690c GIT binary patch literal 8053 zcmWkz2Q(X88@8ztd#6gQh)qkh6lp1m5wT)6MvT(hO6^s%cGRXSG^o96gc@zE4*S#E zt7?{_*6+XP-0|M~-0?o|xjPP$~cgcewR}lqc|n zeVQSd)}8h~jT3nac}T>X2H(6x&|)4DsxOEO4jt2PBE}iUt zLfL_2(|a{&F-m(a3?e0i^15;QryfHnyI$E0GZdMCcbiTlF>8`6Q|zkK0;0F^Fr6Za zA~X?|_AVmobLYwK7|QN9P8aL?cV(U@JwClA;+YgDfKCjWV@)GP<86-?gEv!*pdpM7 z24V%_V`#x#M@k0=ujV+)XnDyDZQ|W5nj9MqwJiFNRHRZ0IdeFpgGKf-XiukVn9YkQ zr>!7Cu17Z70E}E?SU_dbvsWreP%)Ax*E70PzXpwC2y%5|nT!}=20_OK`d?;JoML8{ z;=dC`Ts1`6GNh`(?%&OnC0$4>)K|hkb~j@vKnf57EprRk;n1i86wyWcBX*Uf1`mZ1SW%A&nq 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