stata manual

 stata manual Essay

Introduction to Stata

Christopher F Baum

Faculty Micro Reference Center

Boston College

August 2011

Captain christopher F Azyklischer, zusammenhangender graph (Boston University FMRC)

Introduction to Stata

September 2011

one particular / 157

Strengths of Stata

What is Stata?

Summary of the Stata environment

Stata is a full-featured statistical coding language intended for Windows, Mac pc OS Back button, Unix and Linux. It is usually considered a " stat package, ” like SAS, SPSS, RODENTS, or eViews.

Stata can be found in several editions: Stata/IC (the standard version), Stata/SE (an extended version) and Stata/MP (for multiprocessing). The major difference between the versions is the quantity of variables allowed in recollection, which is restricted to 2, 047 in regular Stata/IC, but can be much bigger in Stata/SE or Stata/MP. The number of

observations in any version is limited only by memory space.

Christopher N Baum (Boston College FMRC)

Introduction to Stata

August 2011

2 as well as 157

Strong points of Stata

What is Stata?

Stata/SE relaxes the Stata/IC constraint for the number of variables, while Stata/MP is the multiprocessor version, capable of utilizing 2, four, 8... processors available on a single computer. Stata/IC will fulfill most users' needs; if you have access to Stata/SE or Stata/MP, you can use that program to make a subset of a giant survey dataset with fewer than 2, 047 variables. Stata runs on all 64-bit operating systems, and may access larger datasets over a 64-bit OPERATING SYSTEM, which can treat a larger storage.

All editions of Stata provide the complete set of features and directions: there are simply no special add ons or ‘toolboxes'. Each copy of Stata includes a total set of guides (over 6, 000 pages) in PDF FILE format, hyperlinked to the across the internet help.

Christopher F Azyklischer, zusammenhangender graph (Boston University FMRC)

Introduction to Stata

August 2011

a few / 157

Strengths of Stata

What is Stata?

A Stata permit may be used in any equipment which supports Stata (Mac OS Back button, Windows, Linux): there are zero machine-specific permit for Stata versions 11 or doze. You may mount Stata on a home and office equipment, as long as they are not employed concurrently. Permits can be possibly annual or perpetual.

Stata works totally different to what would be the norm some other packages in requiring that the whole dataset to be analyzed need to reside in recollection. This brings a considerable rate advantage, yet implies that you might need more RAM (memory) on your computer. There are 32-bit and 64-bit versions of Stata, with all the major difference being how much memory which the operating system can easily allocate to Stata (or any other application).

Christopher N Baum (Boston College FMRC)

Introduction to Stata

August 2011

4 as well as 157

Strengths of Stata

What is Stata?

In some cases, the memory need may be of little concern. Stata has the ability to of keeping data extremely efficiently, as well as a quite sizable dataset (e. g., more than one , 000, 000 observations about 20–30 variables) may only need 500 Megabytes or so. You must take advantage of the shrink command, that can check to see if each changing may be held in fewer bytes than their current allocation. For instance, indicator (dummy) factors and categorical variables with fewer than 75 levels could be held in a one byte, and integers less than 32, 1000 can be saved in two bytes: see support datatypes intended for details. Automatically, floating-point numbers are saved in four bytes, providing about seven numbers of accuracy and reliability. Some other statistical programs often use ten bytes to store all number variables.

Christopher F Azyklischer, zusammenhangender graph (Boston College FMRC)

Introduction to Stata

Aug 2011

five / 157

Strengths of Stata

Precisely what is Stata?

The memory offered to Stata might be considerably below the amount of MEMORY installed on your computer. If you have a 32-bit main system, it does not matter that you have 4 gig or more of RAM installed; Stata will simply be able to access about 1 Gb, depending on additional processes' needs.

To make most reliable use of Stata with significant...