gen: Create a new variable within the data frame

In myominnoo/stats2: Tools of statistical analysis and data management

Description

gen easily create a new variable within the data frame

Usage

gen(data, var, expr = NULL)

Arguments

data	data frame
var	name of a new variable
expr	value or Expression: See examples below.

Details

The value of the variable are specified by expr argument. If expr is not specified, gen generates NA by default.

Author(s)

Myo Minn Oo (Email: [e-mail] | Website: https://myominnoo.github.io/)

See Also

egen

Examples

str(infert)

# convert age into months
df1 <- gen(infert, age.month, age * 12)
head(df1)

# age category
df2 <- gen(infert, age.cat, ifelse(age < 25, 1, ifelse(age >= 25 & age < 35, 2, 3)))
head(df2)

# age category
summary(infert$age)
df3 <- gen(infert, age.cat, cut(age, c(21, 35, 44)))
head(df3)

# create new variable with mean value
df4 <- gen(infert, age.mean, mean(age))
head(df4)

# new NA variable
df5 <- gen(infert, age.cat)
head(df5)

myominnoo/stats2 documentation built on Nov. 4, 2019, 8:33 p.m.