how to make a copy of rows base on condition

[Mike_Davis]

Hello everyone,

In a dataset, I want to copy some rows base on condition,

such as in SAShelp.class,i want make copy of rows whose age is 15,

that means in the following dataset,I want rows 8,14,17,19(Janet,Mary,Ronald,William) ocurr twice(and maybe three times). 

Thanks!

Mike

Original dataset:

Obs Name Sex Age Height Weight

1 Alfred M 14 69.0 112.5

2 Alice F 13 56.5 84.0

3 Barbara F 13 65.3 98.0

4 Carol F 14 62.8 102.5

5 Henry M 14 63.5 102.5

6 James M 12 57.3 83.0

7 Jane F 12 59.8 84.5

8 Janet F 15 62.5 112.5

9 Jeffrey M 13 62.5 84.0

10 John M 12 59.0 99.5

11 Joyce F 11 51.3 50.5

12 Judy F 14 64.3 90.0

13 Louise F 12 56.3 77.0

14 Mary F 15 66.5 112.0

15 Philip M 16 72.0 150.0

16 Robert M 12 64.8 128.0

17 Ronald M 15 67.0 133.0

18 Thomas M 11 57.5 85.0

19 William M 15 66.5 112.0

dataset needed:

Obs Name Sex Age Height Weight

Alfred M 14 69.0 112.5

Alice F 13 56.5 84.0

Barbara F 13 65.3 98.0

Carol F 14 62.8 102.5

Henry M 14 63.5 102.5

James M 12 57.3 83.0

Jane F 12 59.8 84.5

Janet F 15 62.5 112.5

Janet F 15 62.5 112.5

Jeffrey M 13 62.5 84.0

John M 12 59.0 99.5

Joyce F 11 51.3 50.5

Judy F 14 64.3 90.0

Louise F 12 56.3 77.0

Mary F 15 66.5 112.0

Mary F 15 66.5 112.0

Philip M 16 72.0 150.0

Robert M 12 64.8 128.0

Ronald M 15 67.0 133.0

Ronald M 15 67.0 133.0

Thomas M 11 57.5 85.0

William M 15 66.5 112.0

William M 15 66.5 112.0

[Linlin]

Is this what you want?

data class;
set sashelp.class(where=(age=15));
data want;
   set sashelp.class class;
   by name;
proc print;run;
                                            obs    Name       Sex    Age    Height    Weight

                                             1    Alfred      M      14     69.0      112.5
                                             2    Alice       F      13     56.5       84.0
                                             3    Barbara     F      13     65.3       98.0
                                             4    Carol       F      14     62.8      102.5
                                             5    Henry       M      14     63.5      102.5
                                             6    James       M      12     57.3       83.0
                                             7    Jane        F      12     59.8       84.5
                                             8    Janet       F      15     62.5      112.5
                                             9    Janet       F      15     62.5      112.5
                                            10    Jeffrey     M      13     62.5       84.0
                                            11    John        M      12     59.0       99.5
                                            12    Joyce       F      11     51.3       50.5
                                            13    Judy        F      14     64.3       90.0
                                            14    Louise      F      12     56.3       77.0
                                            15    Mary        F      15     66.5      112.0
                                            16    Mary        F      15     66.5      112.0
                                            17    Philip      M      16     72.0      150.0
                                            18    Robert      M      12     64.8      128.0
                                            19    Ronald      M      15     67.0      133.0
                                            20    Ronald      M      15     67.0      133.0
                                            21    Thomas      M      11     57.5       85.0
                                            22    William     M      15     66.5      112.0
                                            23    William     M      15     66.5      112.0

Linlin

[Astounding]

Whether the names are sorted or not, you can do it like this:

data want;

   set sashelp.class;

   output;

   if age=15 then output;  /* and repeat this line, if you want an additional copy */

run;

Good luck.

[Haikuo]

The base code was stolen from Astounding: using Macro to generalize your task:

%macro cpy (dname=,var=,i=);

data want;

   set &dname;

   output;

   if age=&var then 

     do _n_=1 by 1 to &i;

      output; 

     end;

run;

%mend;

%cpy (dname=sashelp.class,var=15,i=2)

Haikuo