Sample 24671: Dynamically determine the number of observations and variables in a SAS® data set
You can use the SAS data set functions OPEN, ATTRN, and CLOSE to retrieve the number of observations and variables in a data set.
Click the Full Code tab to see sample code that illustrates this. Note that this is accomplished using macro code, not in a DATA step.
These sample files and code examples are provided by SAS Institute
Inc. "as is" without warranty of any kind, either express or implied, including
but not limited to the implied warranties of merchantability and fitness for a
particular purpose. Recipients acknowledge and agree that SAS Institute shall
not be liable for any damages whatsoever arising out of their use of this material.
In addition, SAS Institute will provide no support for the materials contained herein.
The sample code below uses the data set functions OPEN, ATTRN, and CLOSE to retrieve the number of observations and variables in a data set.
/* Create a test data set */
data test;
input a b c $ d $;
datalines;
1 2 A B
3 4 C D
;
run;
%macro obsnvars(ds);
%global dset nvars nobs;
%let dset=&ds;
/* Open data set passed as the macro parameter */
%let dsid = %sysfunc(open(&dset));
/* If the data set exists, get the number of observations */
/* and variables and then close the data set */
%if &dsid %then
%do;
%let nobs =%sysfunc(attrn(&dsid,nobs));
%let nvars=%sysfunc(attrn(&dsid,nvars));
%let rc = %sysfunc(close(&dsid));
%end;
/* Otherwise, write a message that the data set could not be opened */
%else %put open for data set &dset failed - %sysfunc(sysmsg());
%mend obsnvars;
/* Execute the macro, passing TEST as the data set parameter */
%obsnvars(test)
%put &dset has &nvars variable(s) and &nobs observation(s).;
These sample files and code examples are provided by SAS Institute
Inc. "as is" without warranty of any kind, either express or implied, including
but not limited to the implied warranties of merchantability and fitness for a
particular purpose. Recipients acknowledge and agree that SAS Institute shall
not be liable for any damages whatsoever arising out of their use of this material.
In addition, SAS Institute will provide no support for the materials contained herein.
Output to SAS log:
test has 4 variable(s) and 2 observation(s).
You can use the SAS data set functions OPEN, ATTRN, and CLOSE to retrieve the number of observations and variables in a data set. Note that this is done in macro code, not a DATA step.
| Type: | Sample |
| Topic: | SAS Reference ==> DATA Step
Common Programming Tasks ==> Utilities
SAS Reference ==> Macro
|
| Date Modified: | 2007-05-04 03:03:05 |
| Date Created: | 2004-09-30 14:09:02 |
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