字符串变量中跨子组的数字变量的均值
Mean for numeric variable Across sub-groups within a string variable
我有以下格式的两个变量：
desc waiting_days
storage display value
variable name type format label variable label
--------------------------------------------------------------------------------------------------------------------------------------
waiting_days float %9.0g
和
desc category
storage display value
variable name type format label variable label
--------------------------------------------------------------------------------------------------------------------------------------
category~y str11 %11s Categories
waiting_days 是数字，而类别变量是包含 11 个唯一子组的字符串，其值来自类别 1、类别 2 等。
我正在尝试为类别字符串变量下的每个类别创建 average_waiting_days。
waiting_days category average_waiting_days
319 category 2 100 days
8763 category 6 85 days
7455 category 3 300 days
464 category 6 85 days
900 category 3 300 days
500 category 3 300 days
这里有一些按类别计算均值的选项。
// Create a new variable with means by category
egen avg_waiting_days = mean(waiting_days), by(category)
// Create a table of means
table category, c(mean waiting_days)
// Calculate means with standard errors
encode category, gen(category_num)
mean waiting_days, over(category_num)
我有以下格式的两个变量：
desc waiting_days
storage display value
variable name type format label variable label
--------------------------------------------------------------------------------------------------------------------------------------
waiting_days float %9.0g
和
desc category
storage display value
variable name type format label variable label
--------------------------------------------------------------------------------------------------------------------------------------
category~y str11 %11s Categories
waiting_days 是数字，而类别变量是包含 11 个唯一子组的字符串，其值来自类别 1、类别 2 等。
我正在尝试为类别字符串变量下的每个类别创建 average_waiting_days。
waiting_days category average_waiting_days
319 category 2 100 days
8763 category 6 85 days
7455 category 3 300 days
464 category 6 85 days
900 category 3 300 days
500 category 3 300 days
这里有一些按类别计算均值的选项。
// Create a new variable with means by category
egen avg_waiting_days = mean(waiting_days), by(category)
// Create a table of means
table category, c(mean waiting_days)
// Calculate means with standard errors
encode category, gen(category_num)
mean waiting_days, over(category_num)