使用来自另一个数据集的信息在SAS中创建网格数据
我需要使用使用来自另一个数据集的信息在SAS中创建网格数据,sas,grid,dataset,datastep,Sas,Grid,Dataset,Datastep,我需要使用SASHELP.CARS中的信息获取一个统一网格20x20的数据集,以便获得x和y变量,如下所示: do y = min(weight) to max(weight) by (min(weight)+max(weight))/20; do x = min(horsepower) to max(horsepower) by (min(horsepower)+max(horsepower))/20; output; end; end; 重量和马力是
SASHELP.CARS
中的信息获取一个统一网格20x20的数据集,以便获得x
和y
变量,如下所示:
do y = min(weight) to max(weight) by (min(weight)+max(weight))/20;
do x = min(horsepower) to max(horsepower) by (min(horsepower)+max(horsepower))/20;
output;
end;
end;
重量
和马力
是SASHELP.CARS
的变量。此外,网格数据集还必须有两列enginesizemean lengthemean
,每行中的值相同,分别等于SASHELP.CARS中的mean(enginesize)
和mean(Length)
(需要所有这些来为回归模型构建依赖关系图).首先计算需要使用的统计数据
proc summary data=sashelp.cars ;
var weight horsepower enginesize length ;
output out=stats
min(weight horsepower)=
max(weight horsepower)=
mean(enginesize length)=
/ autoname
;
run;
然后使用这些值生成“网格”
data want;
set stats;
do y = 1 to 20 ;
weight= weight_min + (y-1)*(weight_min+weight_max)/20;
do x = 1 to 20 ;
horsepower = horsepower_min + (x-1)*(horsepower_min+horsepower_max)/20;
output;
end;
end;
run;