Data/hora: 08/06/2024 18:56:28

Provedor de dados: | 31
País: | United States
Título: | Speaking Stata: Rowwise
Autores: | Cox,   Nicholas J.
Data: | 2012-04-16
Ano: | 2009
Palavras-chave: | Rowsort; Rowranks; Rows; Functions; Loops; Egen; Mata; Minimum; Maximum; Median; Any; All; Distinct values; Sorting; Ranking; Research Methods/ Statistical Methods.
Resumo: | Stata’s main data model treats observations in rows and variables in columns quite differently, but rowwise problems also arise that require working against the grain. This column shows how to exploit existing functions and egen functions when they exist and apply to such problems. It offers advice on how to build your own loops, egen functions, or programs when needed. Mata provides especially convenient tools for constructing many such functions and programs, centered on putting selected data into matrices and then processing each observation as a separate vector. Two programs, rowsort and rowranks, are formally published with this column.
Tipo: | Article
Idioma: | Inglês

Identificador:

pr0046

http://purl.umn.edu/122706

Relação: | Stata Journal&gt;Volume 09, Number 1, 1st Quarter 2009
Formato: | 21