STATAintro

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Transcript STATAintro 

DataServices
NYU

Overview of STATA

Interface

Getting Started

Managing Data

Descriptive Statistics

Basic Analysis

Additional Resources
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STATA is a statistical package that allows
advanced data analysis, management,
and graphics.
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You can choose a perpetual license or an
annual one.
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Available for Windows and Mac.
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Command window:
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Data window activated using br command
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Do File syntax equivalent in SPSS and R
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Commands should be written and saved in Do files rather
then entered directly into the command window
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Some advantages to using Do files:
o allows reusing commands (the same analysis can be quickly
repeated on different data sets as long as the variables name
match)
o allows to copy, past and edit commands
o easier to read complex expressions
o allows sharing commands / methods with other researchers
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Working Directories
o To CHECK the current directory:
pwd
o To CHANGE the directory:
cd
o To VIEW files in the directory:
dir
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Creating / Opening datasets:
 To create a new dataset:
clear
input var1 var2 var3
01 02 03 04
05 06 07 08
09 10 11 12
end
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 To read a Stata dataset:
use dataset name
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To read non-stata formats:
.csv: insheet using “datasetname.csv”
.dat .xls: infile using “datasetname.xls”
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To read a non-Stata format where first row is the
variables’ name:
import excel ”datasetname.xls", sheet(”sheet 1") firstrow
clear
 To save a Stata dataset:
save dataset name, replace
outsheet using dataname.csv, comma replace
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Creating and managing new variables
To create a new variable
egen variable name
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To delete one
drop variable name
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To recode a variable
recode
replace
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For a summary:
sum variable name
sum variable name, detail
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For a cross tabulation
tabulate var1 var2, chi2
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For frequencies
tabulate oneway variable name
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Histogram:
histogram
Scatter Plot
dotplot
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Box Plot
graph box
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Some examples:
pwcorr // pairwise correlation coefficients
ttest
// Mean Comparison Test
regress // OLS regression
anova // Analysis of Variance
logit
// Logistic Regression
ologit // Ordererd Logistic Regression
sem // Build a Structural Equation Model
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help
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http://nyu.libguides.com/content.php?pid=
38898&sid=1554472
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Please follow the link below:

This will only take a few minutes and help us
a great lot in improving the tutorial
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http://tinyurl.com/IntroToStata
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