how to automatically get the smaple size n and compute 1/n *X

[desireatem]

Hi I have this data set

S

1

2

4

3

6

17

I what t0 compute  T=1/n * S,

For this it looks easy because  n=5 (since there are five observations). But I have many data with varying ‘n’, so I want SAS to count and get the n for each data then compute T=1/n *S;

[Ksharp · Accepted solution]

There are lots of way to get it. Here is one way.

%let dsid=%sysfunc(open(sashelp.class));

%let nobs=%sysfunc(attrn(&dsid,nlobs));

%let dsid=%sysfunc(close(&dsid));

%put &nobs ;

Ksharp