用到的stata命令: help datatype;help format 一、数据类型及其区别 1、数值型:黑色 type:byte/ int/long(整数型,数值长度逐渐增加) type:float/double(浮点型,含有小数点的浮动变量,数值长度逐渐增加) 数值型变量区别 数值型转为字符型命令: tostring var,replace //替换掉原有变量 2、字符型:红色 type:str#...
1、数值型:黑色 type:byte/ int/long(整数型,数值长度逐渐增加) type:float/double(浮点型,含有小数点的浮动变量,数值长度逐渐增加) 数值型变量区别 数值型转为字符型命令: tostring var,replace //替换掉原有变量 2、字符型:红色 type:str# (#为字符型变量长度)strL(任意长度的字符串) 例如,female长度为6,...
1、数值型:黑色 type:byte/ int/long(整数型,数值长度逐渐增加); float/double(浮点型,含有小数点的浮动变量,数值长度逐渐增加) 数值型变量区别 数值型转为字符型命令: tosting var,replace //替换掉原有变量 2、字符型:红色 type:str# (#为字符型变量长度)strL(任意长度的字符串) 例如,female长度为6,st...
20000708 57,233.44 7233.44 86% 86.d注意到price2和percent2均变为数扌居值型变量double和byte*3.3.2数值型转化为字符型:tostring.webuse tosthng clear/*该数据中年月 日的数据类型不一样,不能直接相加生成一个反映日期的新变量*/.des/注意到month为字符型,而年和日为数值型.list.gen datel=month+*7 31...
Numeric storage types Byte Integer (int) Long Float Double String (including Unicode, very long strings and BLOBs) Dates and times Business calendars Watch Create a date variable from a date stored as a string.Long string support Up to 2 billion character long strings Coalescing of ...
byte %8.0g Common Stock Float Shares - Canada CSHTRM double %10.0g Trading Volume - Monthly CURCDM str3 %9s ISO Currency Code - Monthly NAVM float %9.0g Net Asset Value - Monthly PRCCM float %9.0g Price - Close - Monthly PRCHM float %9.0g Price - High - Monthly PRCLM float %...
byte %10.0g 是否剔除北交所上市公司 ST byte %10.0g 是否剔除ST或*ST股 IsNewOrSuspend byte %10.0g 是否剔除当年新上市,已经退市或被暂停上市的公 > 司 ShortName str18 %18s 证券简称 BeginningStoc~e double %10.0g 期初股票价格 EPS double %10.0g 每股收益 ReturnA double %10.0g 股票回报率 Beta1...
9、值型Storage typeBytesMinMaxbyte1-127+100int2-32,767+32,740long4-2,147,483,6472,147,483,620float4-1.70141173319*1038 1.70141173319*1036 double8-8.9884656743*103078.9884656743*103082、字符型Storage typeBytesMax length (characters)str111str222 str8080803、新建变量的过程中定义数据类型l gen str3 ge...
.replace age=r(mean)variable age was byte now float (48 real changes made) .predict double xb, xb.gen double hcmean = (1-(1-hc0)^exp(xb))(17 missing values generated) .drop if hc0==.(17 observations deleted) .sort _t.by _t: keep if _n==1(10 observations deleted) .summ ...
generate double admit_time=clock(admit_t,"YMDhms")//将 datetime 从字符型转换为 Stata Datesformat admit_time%tc//呈现格式设定list admit_time admit_t generate dateoftime=dofc(admit_time)//将 datetime 直接转换为 date,亦可理解为一种特殊的提取format dateoftime%td ...