by — Repeat Stata command on subsets of the data

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Stata commands that work with the by prefix indicate this immediately following their syntax diagram by reporting, for example, “by is allowed; see[D] by” or “bootstrap, by, etc,, are allowed; see [U] 11,1,10 Prefix commands”, by and bysort are really the same command; bysort is just by with the sort option, The varlist 1 varlist 2 syntax is of special use to programmers, It

Title stata,com by — Repeat Stata command on subsets of

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by repeats the stata cmd for each group defined by varlist, If stata cmd stores results, only the results from the last group on which stata cmd executes will be stored, by— Repeat Stata command on subsets of the data 3 References Cox, N, J, 2002,Speaking Stata: How to move step by: step, Stata Journal 2: 86–102, Mitchell, M, N, 2010, Data Management Using Stata: A Practical Handbook

Stata Guide: Keyword “by”

by country: some Stata commmand s whatever is achieved by “some Stata command s” is accomplished separately for all groups defined by variable “country”, Note, however, that this presupposes that the data are sorted by “country”, If this is not the case, you may use the sort command prior to executing the command beginning with by,

by, _n, _N

Stata has two system variables that always exist as long as data is loaded, _n and _N, _n basically indexes observations rows: _n = 1 is the first row, _n = 2 is the second, and so on, _N denotes the total number of rows, To illustrate, let’s use stocks,dta, This portfolio contains 32 observations,

Using Stata’s bysort command for panel data in time series

Stata orders the data according to varlist1 and varlist2, but the stata_cmd only acts upon the values in varlist1, This is a handy way to make sure that your ordering involves multiple variables, but Stata will only perform the command on the first set of variables, REMOVE REPEATED DEATHS FROM PATIENT 8 , First, we want to make sure we eliminate the repeated deaths from Patient 8, We can do

Getting Started in Data Analysis using Stata

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Stata screen and general description First steps: Setting the working directory pwd and cd …, Log file log using … Memory allocation set mem … Do-files doedit Opening/saving a Stata datafile Quick way of finding variables Subsetting using conditional “if” Stata color coding system

Introduction au logiciel STATA

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Stata est rapide puisqu’il utilise les donn¶ees directement en m¶emoire, 3, Fen^etre de variables En bas µa gauche la fen^etre de variables liste les variables avec les “labels” de celles-ci quand elles existent, Il su–t de cliquer sur l’une d’elles pour qu’elle soit saisie par la fen^etre commande, Fen^etre de commandes pass¶ees En haut µa gauche la fen^etre des commandes pass

A Practical Introduction to Stata

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A Practical Introduction to Stata Mark E, McGovern Harvard Center for Population and Development Studies Geary Institute and School of Economics, University College Dublin August 2012 Abstract This document provides an introduction to the use of Stata, It is designed to be an overview rather than a comprehensive guide, aimed at covering the basic tools necessary for econometric analysis

Using IF with Stata commands

Stata treats a missing value as positive infinity, the highest number possible, So, when we said list if rep78 >= 4, Stata included the observations where rep78 was ‘ , ‘ as well, If we wanted to include just the valid non-missing observations that are greater than or equal to 4, we can do the following to tell Stata we want only observations where rep78 >= 4 and rep78 is not missing ,

Count observations by group

Moreover, as bug fixes and new features are issued frequently by StataCorp, make sure that you update your Stata before posting a query, as your problem may already have been solved, Specifically, I was wondering whether count wouldn’t take string variables in earlier versions, but I think that it did in 13,1,

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Graphics:Overview of Twoway Plots

Graphics:Overview of Twoway Plots , Stata Learning Modules, This module shows examples of the different kinds of graphs that can be created with the graph twoway command, This is illustrated by showing the command and the resulting graph, For more information, see the Stata Graphics Manual available over the web and from within Stata by typing

StataTutorial

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Stata is available for Windows, Unix, and Mac computers, This tutorial was created This tutorial was created using the Windows version, but most of the contents applies to the other platforms as

Stata — Wikipédia

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81 Introduction to Basic Data Analysis Using STATA

My more than 34-year academic experience reveals that many younger colleagues and almost all research students both at undergraduate and post-graduate levels