SASテクニック SQL 要約統計量を列に追加
SASというよりかはSQLのtips
meansプロシジャなどで要約統計量を求めることができるが、
元データの横にそのまま持たせたいときがある
(合計値を横に持たせて割合出したりなど)
SQLプロシジャを用いて横に持たせる例
proc Sql;
create table work.CLASS as
select
* ,
( select max( AGE ) from sashelp.CLASS ) as MAX_AGE ,
( select mean( HEIGHT ) from sashelp.CLASS where SEX = "男子" ) as MEAN_HEIGHT_M ,
( select mean( HEIGHT ) from sashelp.CLASS where SEX = "女子" ) as MEAN_HEIGHT_F ,
( select count( * ) from sashelp.CLASS ) as OBS ,
( select mean( WEIGHT ) from sashelp.CLASSFIT ) as MEAN_PREDWEIGHT ,
1 + 1 as TEST
from sashelp.CLASS;
quit;
proc Sql;
create table work.CLASS as
select
* ,
( select max( AGE ) from sashelp.CLASS ) as MAX_AGE ,
( select mean( HEIGHT ) from sashelp.CLASS where SEX = "男子" ) as MEAN_HEIGHT_M ,
( select mean( HEIGHT ) from sashelp.CLASS where SEX = "女子" ) as MEAN_HEIGHT_F ,
( select count( * ) from sashelp.CLASS ) as OBS ,
( select mean( WEIGHT ) from sashelp.CLASSFIT ) as MEAN_PREDWEIGHT ,
1 + 1 as TEST
from sashelp.CLASS;
quit;
↑のように列に計算結果をどんどん追加できる
再マージされる機能を利用して以下のような書き方もできる
年齢ごとの要約統計量を列に追加
proc Sql;
create table work.CLASS2 as
select
*,
count( * ) as N ,
sum( HEIGHT ) as SUM ,
avg( HEIGHT ) as MEAN ,
mean( HEIGHT ) as MEAN2
from sashelp.class
group by AGE;
quit;
meansプロシジャとdataステップでも一応可能
meansで要約統計量を求め
data xxx;
set yyy;
if _N_ = 1 then meansの出力データ;
...
run;
など
Author And Source
この問題について(SASテクニック SQL 要約統計量を列に追加), 我々は、より多くの情報をここで見つけました https://qiita.com/saspy/items/636f7aaebb7946eb298f著者帰属：元の著者の情報は、元のURLに含まれています。著作権は原作者に属する。
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