如果字符型变量中包含非数值字符,并且这些字符是有意义的(例如,表示不同的类别),则不应该将其转换为数值型变量。在这种情况下,可以考虑使用因子变量(factor variables)或虚拟变量(dummy variables)来处理这些类别。 引用: Stata: Convert string variable to numeric ...
字符型转换成数值型的STATA方法 字符型转换成数值型的STATA⽅法 1、encode varname, gen (newvarname)，重新⽣成⼀个新的变量，内容与字符型的相同。2、 Convert string variables to numeric variables：destring [varlist] , {generate(newvarlist)|replace} [destring_options]字符转数值 Convert numeric ...
destring String,gen(Str2Num)tostring Number,gen(Num2Str) 初学者总是容易将destring和encode混淆,其实两者的用途是有区别的: destring: Convert string variables to numeric variables and vice versa. encode: Encode string into numeric and vice versa. encode主要用于将数据进行编码、分组,将连续性变量转换成分组...
append : combine datasets by stacking merge : merge datasets (one-to-one or match merge) encode : generate numeric variable from categorical variable recode : recode categorical variable destring : convert string variables to numeric foreach : loop over elements of a list, performing a block of ...
How can I quickly convert many string variables to numeric variables? How can I turn a string variable containing dates into a date variable Stata can recognize? How can I extract a portion of a string variable using regular expressions? Error messages How can I handle the matsize too small...
使用Stata 进行数据处理十分便捷,其中的reshape命令就是用于实现数据形态之转换的,即 Convert data fromwidetolongform and vice versa。不论哪种数据形态,数据集中均包含两种形态下的全部信息,区别在于数据呈现的方式。 本文是对reshape命令的介绍,力图通过10个示例全面介绍该命令的使用方式以及需要注意的问题。
Stata日期和时间处理指南说明书 in Stata Gabriela Ortiz Applied Econometrician StataCorp LLC 1
force参数的作用是“convert nonnumeric strings to missing values” === destring var2,force replace 这个命令不就行了 ? 要是直接用这个,对于是负数的内容会直接missing === // 如何将stata中的字符型数据转为数值型 * Example generated by -dataex-. To install: ssc install dataex clear input str5 ...
This is easy to fix. If you have a string variable and want to convert it to a numeric variable, you can use the encode command. If you have a string variable that has only numbers in it, then you can alternatively use the real() function. ...
(~3.5GB), this choice can make a substantial difference in performance. Using the Stata timer command, we performed standardized benchmarks of common programming tasks, such as searching the NIS for a list of ICD-9 codes, converting string data to numeric and putting numeric variables in ...