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Stata 15 help for dta states, "Stata itself can read older formats, Stata_dta is a download format for several data archives. FAOSTAT provides free access to food and agriculture data for over countries and Fertilizers archive (Discontinued archives and data series). Many user-written ado-files are submitted to the [ Statistical Software Components Archive] hosted by Boston College. StataCorp added an ssc command to allow.

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Keeping Stata 15 up to date

Update within Stata

If you are using Stata 15, Stata 15 free download Archives, and you have a direct Internet connection, type update query in Stata, and Stata will tell you if there are updates and what to do next. See [R] update in the Stata Base Reference Manual for more information.

If you do not have access to the Internet from within Stata, see below. If you are not using Stata 15, click on the appropriate version:

Update without Internet access within Stata

Type about in Stata and note the "Revision" date. If you see a date earlier than "03 Feb ", you need to update Stata. Also make note of your platform and whether it is bit or bit. Download the appropriate file for your operating system and follow the instructions below.


Extract the file you downloaded to a temporary location on your system.

After you have extracted it, you will have one of the following directories on your system with several files in it:

stata15update_win stata15update_linux64
stata15update_mac stata15update_linux32

Type db update in Stata and browse to the extracted update directory. Click OK and follow any instructions you are given.

After installing the updates, you can remove the downloaded update file and files you extracted from it.

Unofficial additions to Stata are also available:

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Stata

Statistical software package

Not to be confused with Stada or Ray Stata.

Stata (,[2]STAY-ta, alternativelyoccasionally stylized as STATA[3][4]) is a general-purpose statistical software package developed by StataCorp for data manipulation, visualization, statistics, and automated reporting. It is used by researchers in many fields, including economics, sociology, political science, biomedicine, and epidemiology.[5]

Stata was initially developed by Computing Resource Center in California and the first version was released in [6] Inthe company moved to College Station, TX and was renamed Stata Corporation, Stata 15 free download Archives, now known as StataCorp.[1] A major release in included a new graphics system and dialog boxes for all commands.[6] Since then, a new version has been released once every two years.[7] The current version is Stata 17, released in April [8]

Technical Stata 15 free download Archives and terminology[edit]

User interface[edit]

From its creation, Stata 15 free download Archives, Stata has always employed an integrated command-line interface. Starting with versionStata has included a graphical user interface based on Qt framework which uses menus and dialog boxes to give access to many built-in commands, Stata 15 free download Archives. The dataset can be viewed or edited in spreadsheet format. From version 11 on, other commands can be executed while the data browser or editor is opened.

Data structure and storage[edit]

Until the release of version 16,[9] Stata could only open a single dataset at any one time. Stata 15 free download Archives allows for flexibility with assigning data types to data. Its command automatically reassigns data to data types that take up less memory without loss of information. Stata utilizes integer storage types which occupy only one or two bytes rather than four, and single-precision (4 bytes) rather than double-precision (8 bytes) is the default for floating-point numbers.

Stata's data format is always tabular in format. Stata refers to the columns of tabular data as variables.

Data format compatibility[edit]

Stata can import data in a variety of formats. This includes ASCII data formats (such as CSV or databank formats) and spreadsheet formats (including various Excel formats).

Stata's proprietary file formats have changed over time, although not every Stata release includes a new dataset format. Every version of Stata can read all older dataset formats, and can write both the current and most recent previous dataset format, using the command.[10] Thus, the current Stata release can always open datasets that were created with older versions, but older versions cannot read newer format datasets.

Stata can read and write SAS XPORT format datasets natively, using the fdause and fdasave commands.

Some other econometric applications, including gretl, can directly import Stata file formats.

History[edit]

Origins[edit]

The development of Stata began ininitially by William (Bill) Gould and later by Sean Becketti. The software was originally intended to compete with statistical programs for personal computers such as SYSTAT and MicroTSP.[6] Stata was written, then as now, in the C programming language, initially for PCs running the DOS operating system. Stata 15 free download Archives first version was released in with 44 commands.[6]

append dir infile plot spool
beepdoinputquerysummarize
bydroplabelregresstabulate
captureeraselistrenametest
confirmexitmacroreplacetype
convertexpandmergerunuse
correlateformatmodifysave
countgeneratemoreset
describehelpoutfilesort

Development[edit]

There have been 17 major releases of Stata between andand additional code and documentation updates between major releases.[7] In its early years, extra sets Stata 15 free download Archives Stata programs were sometimes sold as "kits" or distributed as Support Disks. With the release of Stata 6 ins began to be delivered to users via the web.[6] The initial release of Stata was for the DOS operating system. Since then, versions of Stata have been released for systems running Unix variants like Linux distributions, Windows, and MacOS.[6] All Stata files are platform-independent.

Hundreds of commands have been added to Stata in its year history.[11][12] Certain developments have proved to be particularly important and continue to shape the user experience today, including extensibility, platform independence, and the Stata 15 free download Archives user community.[6]

Extensibility[edit]

The command was implemented in Statagiving users the ability to add their own commands.[6][13] ado-files followed in Stataallowing a user-written program to be automatically loaded into memory. Many user-written ado-files are submitted to the [ Statistical Software Components Archive] hosted by Boston College. StataCorp added an command to allow community-contributed programs to be added directly within Stata.[14] More recent editions of Stata allow users to call Python and R scripts using commands, as well as allowing Python IDEs like Jupyter Notebooks to import Stata commands.[15][16]

[edit]

A number of important developments were initiated by Stata's active user community.[6] The Stata Technical Bulletin, Stata 15 free download Archives, which often contains user-created commands, was introduced in and issued six times a year. It was relaunched in as the peer-reviewed Stata Journal, a quarterly publication containing descriptions of community-contributed commands and tips for the effective use of Stata. Ina listserv began as a hub for users to collaboratively solve coding and technical issues; init was converted into a web forum. InStatacorp began organizing user and developer conferences that meet annually. Only the annual Stata Conference held in the United States is hosted by StataCorp. Other user group meetings are held annually in the United States (the Stata Conference), the UK, Germany, and Italy, and less frequently in several other countries. Local Stata distributors host User Group meetings in their own countries.

Version Release date Select new or enhanced features
January
  • Initial release
  • Forty-four commands
February
May
  • New menu system
  • Better online help
August
August
  • New documentation
  • Formatted
February
June
  • New graphics
  • String variables
  • Survival analysis: Cox and Kaplan-Meier
  • Stepwise regression
September
  • Byte variables
  • Factor analysis
  • ado-files
March
  • ,
  • ,,
August
  • ,,
  • constrained linear regression
January NCH MixPad Masters Edition Crack Free Download
  • ,
  • ,
  • survey estimation commands
  • extended
January
  • web aware
  • new
  • time-series operators
  • ,
  • rewritten
December
  • cluster analysis
  • SMCL
January
  • graphics
  • extended GUI, dialog boxes available for all commands
  • more survey
  • more time series (VARs, SVARs)
  • more GLLAMM internalization
July
October
April
  • mata matrix programming language
  • survey features
  • linear mixed models
  • multinominal probit models
September
April
June
  • graph editor
  • logistic and Poisson models with complex, nested error components
August
July
  • factor variables
  • postestimation command
  • multiple imputation
June
March
July
  • automatic memory management
  • structural equation modeling
January
June
  • long strings
  • treatment effects
October
April
  • unicode support
  • bayesian statistical analysis
October
September
June
  • latent class analysis
  • PDF and Word documents
  • color transparency or opacity in graphs
November
June
  • frames (multiple datasets in memory)
  • lasso regression
  • automated reporting
  • updated choice models
February
April
  • updated command
  • bayesian econometrics

Software products[edit]

There are four builds of Stata: Stata/MP, Stata/SE, Stata/BE, and Numerics by Stata.[17] Whereas Stata/MP allows for built-in parallel processing of certain commands, Stata/SE and Stata/BE are bottlenecked and limit usage to only one single core.[18] Stata/MP runs certain commands about times faster, roughly 60% of theoretical maximum efficiency, Stata 15 free download Archives, when running parallel processes on four CPU cores compared to SE or BE versions.[18] Numerics by Stata allows for web integration of Stata commands.

SE and BE versions differ in the amount of memory datasets may utilize. Though Stata/MP can store 10 to 20 billion observations and up tovariables, Stata/SE and Stata/BE store up to billion observations and handle 32, variables and 2, variables respectively. The maximum number of independent variables in a model is 65, variables in Stata/MP, 10, variables in Stata/SE, and variables in Stata/BE.[17]

The pricing and licensing of Stata depends on its intended use: business, Stata 15 free download Archives, government/nonprofit, education, or student. Single user licenses are either renewable annually or perpetual. Other license types include a single license for use by concurrent users, a site license, volume single user for bulk pricing, or a student lab.[19]

Example code[edit]

The following set of commands revolve around simple data management.[20]

sysuse auto // Open the included auto datasetbrowse// Browse the dataset (opens the Data Editor window)describe// Describes the dataset and associated variablessummarize// Summary information about numerical variablescodebook make foreign // Summary information about the make (string) and foreign (numeric) variablesbrowse ifmissing(rep78) // Browse only observations with missing data for variable rep78list make ifmissing(rep78) // List makes of the cars with missing data for variable rep78

The next set of commands move onto descriptive statistics.

summarize price, detail // Detailed summary statistics for variable pricetabulate foreign // One-way frequency table for variable foreigntabulate rep78 foreign, row // Two-way frequency table for variables rep78 and foreignsummarize mpg if foreign ==1// Summary information about mpg if the car is foreign (the "==" sign tests for equality)by foreign, sort: summarize mpg // As above, but using the "by" applemacs.uste foreign, summarize(mpg) // As above, but using the tabulate command.

A simple hypothesis test:

ttest mpg, by(foreign) // T-test for difference in means for domestic vs. foreign cars

Graphing data:

twoway (scatter mpg weight) // Scatter plot showing relationship between mpg and weighttwoway (scatter mpg weight), by(foreign, total) // Three graphs for domestic, foreign, and all cars

Linear regression:

generate wtsq = weight^2// Create a new variable for weight squaredregress mpg weight wtsq foreign, vce(robust) // Linear regression of mpg on weight, wtsq, and foreignpredict mpghat // Create a new variable contained the predicted values of mpgtwoway (scatter mpg weight) (line mpghat weight, sort), by(foreign) // Graph data and fitted line
Stata 15 free download Archives src="applemacs.us" width="" height="">
Regression graphs from auto dataset in Stata 17

See also[edit]

References[edit]

  1. ^ abNewton, H. Joseph (). "A conversation with William Gould". The Stata Journal. 5 (1): 19– doi/X S2CID&#;
  2. ^Cox, Stata 15 free download Archives, Nicholas J. "Statalist FAQ". Statalist: The Stata Forum. Retrieved 24 April
  3. ^applemacs.us
  4. ^Suárez, Erick; Pérez, Cynthia; Nogueras, Graciela; Moreno-Gorrín, Camille (). biostatistics-in-public-health-using-stata.
  5. ^"Disciplines". Stata: Software for Statistics and Data Science. Retrieved
  6. ^ abcdefghiCox, Nicholas J. (). "A brief history of Stata on its 20th anniversary". The Stata Journal. 5 (1): 2– doi/X S2CID&#; Retrieved 22 April
  7. ^ abGould, William W.; Cox, Nicholas J. "When was Microsoft Flight Simulator pc Archives first released? When were later versions released?". Stata: Software for Statistics and Data Science. Retrieved 22 April
  8. ^"What's new in Stata?". Stata: Software for Statistics and Data Science. StataCorp. Retrieved 22 April
  9. ^"Data frames: multiple datasets in memory". applemacs.us. Retrieved
  10. ^"Stata 16 help for save". applemacs.us.
  11. ^Stata Glossary and Index: Release 17(PDF). College Station, TX: Stata Press. pp.&#;1– ISBN&#.
  12. ^"Stata features". Stata: Software for Statistics and Data Science. StataCorp, Stata 15 free download Archives. Retrieved 24 April
  13. ^"program - Define and manipulate programs"(PDF), Stata 15 free download Archives. Stata: Software for Statistics and Data Science. Stata Press. Retrieved 24 April
  14. ^"ssc - Install and uninstall packages from SSC"(PDF). Stata: Software for Statistics and Data Science. Stata Press. Retrieved 24 April
  15. ^applemacs.us
  16. ^applemacs.us
  17. ^ ab"Which Stata is right for me?". Stata: Software for Statistics and Data Science. Retrieved 23 April
  18. ^ ab"Parallel Stata". Harvard Business School.
  19. ^"Order Stata software". Stata: Software for Statistics and Data Science. StataCorp. Retrieved 25 April
  20. ^Getting Started with Stata for Windows(PDF) (Release 17&#;ed.). College Station, TX: Stata Press. pp.&#;1– ISBN&#. Retrieved 25 April

Further reading[edit]

External links[edit]

Источник: [applemacs.us]
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