SAS Procedures for Handling Missing DataBarcikowski, Robert
title "Missing value check for the patients data set";/*输出结果增加标题*/ proc means data=class n nmiss;/*也可增加var语句选择感兴趣的变量*/ run; proc format; value $misscnt ' ' = 'Missing' other = 'Nonmissing'; run; proc freq data=class; tables _character_ / nocum missing;/*ta...
Missing data for a single variable is classifed into one of three categories: missing completely at random (MCAR), missing at random (MAR), and misiing not at random (MNAR) (一)缺失机制 缺失机制包括三种: 完全随机缺失(Missing completely at random,MCAR):个体值的发生缺失的概率是完全随机的,既...
今天分享一份由 Yonghua Zhuang 上传到Github 的人口学表格sas code示例,供参考学习。options ps=77 ls=100 center formchar="|___|||___+=|_/\<>*" missing='.' nobyline nodate pagno=1…
data home; infile cards; input name $1-7 works $9-33 cost; if cost = '.' then costgroup = 'missing 1.3K50 SAS-函数(二),几个很好用的函数~ 在SAS编程中,经常遇需要判断一条观测下,缺失值的情况的,比如:“是否有不良事件选择否,但不良事件记录不全为空”。那么就来看看几个函数,如何来实现...
This paper presents an overview of considerations that need to be made when confrontedwith missing data. We describe how to efficiently check for missing values, as well as investigate how SAS handlesmissing values and what can be done to correct for these missing values in your analysis.Theresa...
Datalines can be very wide, so to avoid the need to increasemaxLineLengthfor the entire project, it is possible to raise the line length limit for the data records only. On a related note, as a developer, you should also be aware that code submitted in batch may have a default line le...
这是我的代码: data test2; input x w t; cards; 10 2 1 20 0 1 30 5 1 40 0 1 50 0 1 10 2 2 20 0 2 50 0 2 40 0 2 30 5 2 ; run; proc stdize data=test2 out=outdata2 outstat=teststat2 vardef=wgt missing=0; var x; weight w; by t; run; 这是sas9.4生成的teststa...
纵向合并后,new_dataset 的行数等于每个数据集行数的加总。If one of the data sets has a variable not contained in the other data sets, then the observations from the other data sets will have missing values for that variable. 横向合并中的 by variable list 是所有数据集共同的变量。
filename extfiles 'C:\sas\data';data saslib.inventory_missing; infile extfiles(inventory_missing) dlm=','; input Product_ID $ Instock $ Price;run;proc print data=saslib.inventory_missing noobs;run; 使用INFILE语句选项DSD 指定DSD后,如果数据值由引号引起来,可以将数据值中的分隔符当作数据值的...