初学者 - SAS中的出生日期

Question

在此处输入图像描述我是初级班的 SAS 编码新手，我正在努力与基础知识。我试图首先创建一个 date_of_birth 变量，但我不断发现month_of_birth、day_of_birth 和year_of_birth 未初始化。我已将代码放在下面，任何帮助将不胜感激！

code:



data dob;
set Assign6_sp2022;
date_of_birth = MDY (Month_of_Birth, Day_of_Birth, Year_of_Birth);
run;

log:
48   data dob;
49   set Assign6_sp2022;
50   date_of_birth = MDY (Month_of_Birth, Day_of_Birth, Year_of_Birth);
51   run;

NOTE: Variable Month_of_Birth is uninitialized.
NOTE: Variable Day_of_Birth is uninitialized.
NOTE: Variable Year_of_Birth is uninitialized.
NOTE: Missing values were generated as a result of performing an operation on missing values.
      Each place is given by: (Number of times) at (Line):(Column).
      1 at 50:17
NOTE: There were 1 observations read from the data set WORK.ASSIGN6_SP2022.
NOTE: The data set WORK.DOB has 1 observations and 5 variables.
NOTE: DATA statement used (Total process time):
      real time           0.01 seconds
      cpu time            0.01 seconds

Answer 1

您的表似乎位于 Assn6 库中。
确保在 set 语句中使用它：set Assn6.Assign6_sp2022。

另外，您的变量名称中似乎有空格。
如果是这种情况，您需要使用带引号的字符串，后跟字母 N。
请改用“出生月份”n、“出生日期”n 和 “出生年份”n。

data dob;
set Assn6.Assign6_sp2022;
date_of_birth = mdy("Month of Birth"n, "Day of Birth"n, "Year of Birth"n);
run;