sysuse nlsw88, clear

graph bar (mean) wage, over(smsa) over(married) over(collgrad)

title("Average Hourly Wage, 1988, Women Aged 34-46")

subtitle("by College Graduation, Marital Status,

and SMSA residence")

note("Source: 1988 data from NLS, U.S. Dept. of Labor,

Bureau of Labor Statistics")

结果为：

累加柱体或者横向条形图

简单的操作命令为

sysuse educ99gdp, clear

graph hbar (mean) public private, over(country)

graph hbar (mean) public private, over(country) stack

完整的案例代码如下：

. sysuse educ99gdp, clear

generate total = private + public

graph hbar (asis) public private,over(country, sort(total) descending) stack

title( "Spending on tertiary education as % of GDP,1999", span pos(11) )

subtitle(" ")

note("Source: OECD, Education at a Glance 2002", span)

结果为：

二维柱状图

二维柱状图的代码帮助为

help twoway bar

菜单式操作为

Graphics > Twoway graph (scatter, line, etc.)

经典介绍案例：

sysuse sp500

list date close change in 1/5

twoway bar change date in 1/57

twoway bar change date in 1/57, barw(.6)

advanced use

The useful thing about twoway bar is that it can be combined with other twoway plottypes:

twoway line close date || bar change date || in 1/52

sysuse pop2000, clear

list agegrp maletotal femtotal

replace maletotal = -maletotal/1e+6

replace femtotal = femtotal/1e+6

twoway bar maletotal agegrp, horizontal xvarlab(Males) ||

bar femtotal agegrp, horizontal xvarlab(Females) ||

ylabel(1(1)17, angle(horizontal) valuelabel labsize(*.8))

xtitle("Population in millions") ytitle("")

xlabel(-10 "10" -7.5 "7.5" -5 "5" -2.5 "2.5" 2.5 5 7.5 10)

legend(label(1 Males) label(2 Females))

title("US Male and Female Population by Age")

subtitle("Year 2000")

note("Source: U.S. Census Bureau, Census 2000, Tables 1, 2 and 3", span)

更多高级绘图及计量经济学和stata应用，尽在2017年8月4-7日stata课程。关于图形这部分章节内容，中心将从图形介绍以及图形的使用功能简介意义方面着手介绍，让大家知道什么情况下应该用什么图。

另外学会各种图形的帮助文件能够画出更多精美实用的图形。

参考资料：stata帮助文件

（课程将会把讲义，包括各模型附带的stata实现过程（do文档）全部开放给大家）

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