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The option replace overwrites an existing dataset with the same name. If no filename is specified, the name under which the data was last known is used. These dataset can directly be opened by, for example, webuse lifeexp, clear An open datafile is saved by, for example, save mynewdata, replace in the file mynewdata.dta.
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Stata provides a long series of example datasets at com/data/r12/. For example, net search unitroot lists implementations of unit roots tests described in the Stata Journal (SJ), the old Stata Technical Bulletin (STB) or submitted by users.Ĥ A Short Guide to Stata Opening and Saving Data Open an existing Stata datafile, for example mydata.dta, by use mydata, clear where the option clear removes a previously opened dataset from the Stata memory. You can search these resources from within Stata. If you don t know the exact expression for the command, you can search the Stata documentation by, for example, search covariance 4 Additions to Stata Many researchers provide their own Stata programs on Stata s webpage.
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However, there is as link indicated by in the top section which opens the pdf version of the corresponding Reference manual. The online does not itself explain the statistical methods. For example, help correlate describes the use of the command to calculate the correlation between two or more variables. You can start the online with the help command. The online help in Stata describes all Stata commands with their options. It is also often an excellent treatise of the implemented statistical methods.
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The printed Stata Base Reference Manual provides systematic information about all Stata commands. This makes commands you are using for the first time easier to learn as the proper syntax for the operation is displayed in the Review window.ģ 3 Short Guides to Microeconometrics 3 Where to get help The printed Stata User s Guide is an introduction into the capabilities and basic concepts of Stata. The active datafile can be browsed (read-only) in the Browser window, which is activated from the menu Data/Data browser or by the command browse The Editor window allows to edit data either by directly typing into the editor window or by copying and pasting from spreadsheet software: edit Since version 8, Stata has implemented every command (except the programming commands) as a dialog that can be accessed from the menus.
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2 The Stata Environment When you start Stata, you will see the following windows: the Command window where you type in your Stata commands, the Results window where Stata results are displayed, the Review window where past Stata commands are displayed and the Variables window which list all the variables in the active datafile. are set in italics while built-in Stata functions and operators are upright. Stata commands are set in Courier example specific datafiles, variables, etc. All commands are shown using specific examples. More commands are described in the respective handouts. Kurt Schmidheiny Universität Basel A Short Guide to Stata 13 1 Introduction 2 2 The Stata Environment 2 3 Where to get help 3 4 Additions to Stata 3 5 Opening and Saving Data 4 6 Importing Data from Excel 5 7 Data Manipulation 6 8 Descriptive Statistics 9 9 Graphs OLS Regression Log Files Do-Files Important Functions and Operators 15 Version:, 12:00Ģ A Short Guide to Stata Introduction This guide introduces the basic commands of Stata. 1 Short Guides to Microeconometrics Fall 2015 Prof.