How to sum element from n and below

[desireatem]

data CP;

input t ;

cards;

2

2 

3

2

4

I want  to create variable sum where sum add the number from n and below like this:

2  Sum=2+2+3+2+4

2  Sum=  2+3+2+4

3 Sum=  3+2+4

2  Sum=  2+4

4  Sum=4

2) And how Do I do this. I want to add 2, 2(2) t the terms in t as I go dowm. Creating variable m.

data AA;

input t;

cards ;

1

1

1

1

to

data AA;

input t m;

cards ;

1  1+2

1   1+2(2)

1  1+3(2)

1  1+4(2)

Thanks

[art297]

data CP;

  input t;

  recnum=_n_;

cards;

2

2

3

2

4

;

proc sort data=cp out=aa;

   by descending recnum;

run;

data aa;

  set aa;

  sum+t;

run;

proc sort data=aa (drop=recnum);

  by descending sum;

run;

data bb;

  input t;

  m=t+_n_*2;

  cards ;

1

1

1

1

;

[desireatem]

Thanks thanks a lot can I do I preserve the order?

[art297 · Accepted solution]

I'm confused!  I thought the code I suggested DID preserve the order in both cases.

[desireatem]

The second code is good, this is the output of the first

The SAS System

      

1	4	5	4
2	2	4	6
3	3	3	9
4	2	2	11
5	2	1	13

[desireatem]

you are correct. Thanks