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标题:
求助如何构造有缺失数据的数据集
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作者:
shiyiming
时间:
2008-11-13 11:17
标题:
求助如何构造有缺失数据的数据集
我现在有一个完整的数据集,想通过编程,实现对该完整数据集构造具有不同缺失率(比如10%、20%)的随机缺失数据集,请问如何编程实现呢?
作者:
shiyiming
时间:
2012-8-2 17:42
标题:
Re: 求助如何构造有缺失数据的数据集
[code:3oie9llr]
data ads;
do i=1 to 100;
j=2*i;
output;
end;
run;
proc surveyselect data=ads
method =srs
rep=1
sampsize=10
seed=12345
out=bds;
id i;
run;
proc sql noprint;
create table cds as
select *
from ads
where i not in
(select i from bds);
quit;
data bds;
set bds;
j=.;
run;
data dds;
set cds bds;
run;
data eds;
set dds;
drop i;
run;
[/code:3oie9llr]
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