Data types

Data output format: eg: % 9.0 g, % 9.2 f, % 10.7 e

Byte, int and long generally represent integer values,

double and float are generally the format of decimal values

g: General format; F: fixed format; E: scientific counting method

Data Import

Type use + path/filename

例如：use "C:/Users/YourName/Documents/mydata.dta"

describe 介绍了数据集的基本信息
summarize 提供了变量的描述性统计
tabulate 用于生成频率表，比如如果我想知道黑人在数据集中的比例，就可以使用 tabulate black 如果我想知道“What proportion is black, under 40?”，那么我可以使用 tabulate black if age < 40
twoway 用于绘制散点图、折线图等二维图形，比如 twoway (scatter yvar xvar) 会绘制 yvar 对 xvar 的散点图

Always remember: All stata regression commands work the same way:

Command DependentVariable IndependentVariables, Options