python-data-英语单词
In this video we'll be talking about data analysis and the scenario in which we'll be playing the data analyst or data scientist.
在这个视频里，我们将讨论数据分析和用脚本语言分析数据或成为数据科学家
Data analysis and, in essence, data science, helps us unlock the information and insights from raw data to answer our questions.数据分心，数据科学，本质上帮助我们从原始数据里分析出来信息和见解来解决问题
比如说卖车，如何定一个合理的价格
dataset数据集
A Python library is a collection of functions and
methods that allow you to perform lots of actions without writing any code.
python库是一个函数和方法的集，允许你大量的操作但不用写大量代码
Each row is one datapoint.每一行都是一个数据点
the properties are separated from each other by commas,属性彼此间以逗号分离
The first method called simple feature scaling just divides each value by the maximum value for that feature.第一种方法简单缩放
The second method called min-max takes each value X_old subtract it from the minimum value of that feature,then divides by the range of that feature.
The third method is called z-score or standard score.
categorical variables in your dataset.数据集中的分类变量
关联
