Differences between revisions 2 and 6 (spanning 4 versions)

Stata Duplicates

-duplicates- reports on and deletes duplicated cases.

Contents

Usage

duplicates drop KEYVARS, force

To drop true duplicated cases (i.e. all values match), try duplicates drop (no variable list).

duplicates report stores the number of unique observations in r(unique_value).

duplicates drop stores the number of rows dropped in r(N_drop)

-  ⇤ ← Revision 2 as of 2023-06-08 00:25:08 → 
  Size: 327
  Editor: DominicRicottone
  Comment:
+   ← Revision 6 as of 2025-10-24 17:10:46 → ⇥
  Size: 622
  Editor: DominicRicottone
  Comment: Rewrite
-Deletions are marked like this.
+Additions are marked like this.
 Line 3:
-The '''`duplicates`''' command reports on and deletes duplicated cases.
+'''`-duplicates-`''' reports on and deletes duplicated cases.
 Line 19:
+----



== Stored Results ==

`duplicates report` stores the number of unique observations in `r(unique_value)`.

`duplicates drop` stores the number of rows dropped in `r(N_drop)`

----



== See also ==

[[https://www.stata.com/manuals/dduplicates.pdf|Stata manual for -duplicates-]]