Question

我的数据集（名为A）有列：A B C.我想在其末尾添加新的观察结果（新行），其值为：1 2 3.必须有一种简单的方法可以做到这一点？

Answer 1

只需使用proc sql和insert语句即可。

proc sql;
    insert into table_name (A,B,C) values (1,2,3);
quit;

Answer 2

以下是另外5种方法：

/*Some dummy data*/

data have;
input A B C;
cards;
4 5 6
;
run;

data new_rows;
input A B C;
cards;
1 2 3
6 7 8
;
run;

/* Modifying in place - more efficient, increased risk of data loss */

proc sql;
    insert into have
    select * from new_rows;
quit;

proc append base = have data = new_rows;
run;

data have;
    modify have;
    set new_rows;
    output;
run;

/* Overwriting - less efficient, no harm if interrupted. */

data have;
    set have new_rows;
run;


data have;
    update have new_rows;
    /*N.B. assumes that A B C form a set of unique keys and that the datasets are sorted*/
    by A B C;
run;

最后将观察添加到现有SAS数据集

2 个答案: