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RSS订阅原创 pandas
pandas操作：1 透视表2 pivot_table == gropby3 透视：由表及里4 要对数据进行透视分组计算values 透视的属性，列索引index 透视表的行索引columns 透视表的列索引aggfunc 透视就是计算（执行什么样的计算）Python库出现问题，需要彻底卸载安装：1、pip uninstall xxx2、检查一下Python安装目录D:...
2020-03-05 20:28:22
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原创 pandas重塑
{ "cells": [ { "cell_type": "code", "execution_count": 1, "metadata": {}, "outputs": [], "source": [ "import numpy as np\n", "\n", "import pandas as pd" ] }, { ...
2020-02-28 08:33:27
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原创 pandas基础分组
{ "cells": [ { "cell_type": "code", "execution_count": 1, "metadata": {}, "outputs": [], "source": [ "import numpy as np\n", "import pandas as pd" ] }, { "cell_type...
2020-02-28 08:31:36
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原创 pandas基础运算和合并示例
{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "### Python数据分析的三剑客" ] }, { "cell_type": "code", "execution_count": 1, "metadata": {}, "outputs":...
2020-02-28 08:27:43
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原创 pandas-helloworld-创建查找选择空值
{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "### Python数据分析的三剑客" ] }, { "cell_type": "code", "execution_count": 1, "metadata": {}, "outputs":...
2020-02-28 08:24:30
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原创 openCV视频识别人脸戴面具源代码
{ "cells": [ { "cell_type": "code", "execution_count": 2, "metadata": {}, "outputs": [], "source": [ "import numpy as np\n", "import cv2" ] }, { "cell_type": "code"...
2020-02-28 08:22:09
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原创 pandas
pandaspython data analysis lib ----->pandaspython数据分析库pip install pandas -i https://pypi.tuna.tsinghua.edu.cn/simple（指定源）Pandas是一个强大的分析<font color = red>结构化数据的工具集；它的使用基础是Numpy（提供高性能的矩阵运算...
2020-02-28 08:17:12
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原创 openCV人脸检测-替换 源代码：
{ "cells": [ { "cell_type": "code", "execution_count": 1, "metadata": {}, "outputs": [], "source": [ "import numpy as np\n", "import cv2" ] }, { "cell_type": "code"...
2020-02-27 09:01:31
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原创 openCV摄像头人脸检测源代码：
{ "cells": [ { "cell_type": "code", "execution_count": 2, "metadata": {}, "outputs": [], "source": [ "import numpy as np\n", "import cv2\n", "face_detector = cv2.CascadeC...
2020-02-27 08:59:59
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原创 Python视频中人脸识别openCV源代码
{ "cells": [ { "cell_type": "code", "execution_count": 1, "metadata": {}, "outputs": [], "source": [ "import numpy as np\n", "import cv2" ] }, { "cell_type": "code"...
2020-02-27 08:58:30
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原创 numpy使用及opencv识别人脸基础
numpy使用numpy是什么：功能强大的N维数组对象。精密广播功能函数。集成 C/C+和Fortran 代码的工具。强大的线性代数、傅立叶变换和随机数功能numpy利器之一：Ndarraynumpy利器之二：索引和切片numpy和matlab进行对比matlab非常强大的数据分析软件和工具，语言自成一体matlab进行数值和科学计算matlab收费，收...
2020-02-25 17:41:11
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原创 数据分析：Day01软件安装及基础
python + jupyter进行开发安装jupyterpip install jupyter国内源（清华源）：pip install -i https://pypi.tuna.tsinghua.edu.cn/simple jupyter环境变量的配置Python最好安装的非系统盘环境变量配置，就是为了全局的使用安装numpypip install num...
2020-02-24 17:12:17
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