Use the SET and BY statements to interleave data sets.

Note:  Interleaving uses a SET statement and a BY statement to create a new, sorted data set from multiple data sets. The number of observations in the new data set is the sum of the number of observations in the original data sets. The observations in the new data set are arranged by the values of the BY variable(s) and, within each BY-Group, the order of the data sets in which they occur, including duplicates.

To interleave, data sets need to be in sorted order or indexed on the BY variables.

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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.

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data animal;                 
  input common $ animal $;
datalines;
a     Ant 
a     Ape           
b     Bird           
c     Cat            
d     Dog            
;

data plant;
  input common $ plant $;
datalines; 
a     Apple
b     Banana
c     Coconut
d     Dewberry
e     Eggplant
f     Fig
;


data interleaving;
  set animal plant;
  by common;
run;

proc print data=interleaving;
run;

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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.

Obs    common    animal    plant

  1      a        Ant
  2      a        Ape
  3      a                 Apple
  4      b        Bird
  5      b                 Banana
  6      c        Cat
  7      c                 Coconut
  8      d        Dog
  9      d                 Dewberry
 10      e                 Eggplant
 11      f                 Fig

Use the SET and BY statements to interleave data sets.

Type:	Sample
Topic:	SAS Reference ==> DATA Step SAS Reference ==> Statements ==> File-handling ==> SET Common Programming Tasks ==> Combining Data SAS Reference ==> Statements ==> File-handling ==> SET ==> with BY

Date Modified:	2008-01-28 11:27:01
Date Created:	2004-09-30 14:09:09

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