[讨论][推荐][分享][下载]SAS: Resource For SAS User

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<H2>
<CENTER><br>
<CENTER>SAS Frequently-Asked Questions</CENTER>
<CENTER><a href="http://www.usc.edu/isd/doc/statistics/sas/faq/" target="_blank" >http://www.usc.edu/isd/doc/statistics/sas/faq/</A></CENTER></CENTER></H2>

[此贴子已经被作者于2006-5-5 12:12:17编辑过]

<H1>A SAS User's Guide to Stata</H1><BR>This guide is intended to introduce a SAS user to Stata and to be a cheat sheet when writing Stata code.  There is a <a href="http://www.cpc.unc.edu/services/computer/presentations/statatutorial" target="_blank" >Stata tutorial</A> to help any new user learn Stata.  It is referred to on occasion throughout these pages. <BR>
<UL>
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/basic.html" target="_blank" >Basic Conceptual Differences Between SAS and Stata</A>.
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/interactive.html" target="_blank" >Stata's Windows Mode </A>
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/sas_to_stata.html" target="_blank" >SAS code matched to Stata code</A>
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/batch.html" target="_blank" >How to submit Stata do-files in batch mode.</A>
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/statatutorial/example18.html" target="_blank" >Example Stata Do-file in the Stata tutorial</A> </LI></UL>
<H3>Tools to transfer data between SAS and Stata:</H3>
<UL>
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/savastata.html" target="_blank" >SAVASTATA</A>: SAS macro to save a SAS dataset as a Stata dataset.
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/savasas.html" target="_blank" >SAVASAS</A>: Stata program to save a Stata dataset as a SAS dataset.
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/usesas.html" target="_blank" >USESAS</A>: Stata program to use a SAS dataset while in Stata.<BR>
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/savas.html" target="_blank" >SAVAS (c-shell) script</A>: Invoked at a Unix or Linux prompt makes Stata data file copies of SAS data files or SAS data file copies of Stata data files. <BR></LI></UL>
<H3>Papers to be presented at the Southeastern SAS Users Group conference (SESUG) in Nashville November 2004:</H3>
<UL>
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/Stata_for_the_Struggling_SAS_Mind.pdf" target="_blank" >Stata for the Struggling SAS Mind</A>: Introduction to Stata from someone who is already familiar with SAS.
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/Tools_to_Transfer_Data_between_SAS_and_Stata.pdf" target="_blank" >Tools to Transfer Data between SAS and Stata</A>: Explanation of how to use the SAVASTATA, SAVASAS, USESAS, and SAVAS programs. </LI></UL>
<H3>SAS macros inspired by Stata commands: </H3>
<UL>
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/minime.html" target="_blank" >MINIME</A> : SAS macro to reset variable lengths to a safe minimum storage length like Stata's -compress-. <BR>
<LI><a href="http://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/ren_stem" target="_blank" >REN_STEM</A> : SAS macro to rename variables by adding a prefix or suffix which Stata can do in a -foreach- loop.  <BR>
<LI><a href="https://www.cpc.unc.edu/services/computer/presentations/sas_to_stata/char2fmt" target="_blank" >CHAR2FMT</A> : SAS macro to convert character variables to numeric but keep the character information stored in a SAS format like Stata's -encode-. </LI></UL>

<DIV>
<H1>Software to Compute Sampling Weights for Multilevel Analysis</H1>
<P></P><BR>
<P center" align=center>Kim Chantala</P>
<P center" align=center> Dan Blanchette</P>
<P center" align=center>C. M. Suchindran</P>
<P center" align=center> </P>
<P center" align=center>Carolina Population Center</P>
<P center" align=center>UNC at Chapel Hill, NC</P>
<P center" align=center> </P>
<P center" align=center>Last Update:  February 22, 2006</P>
<P> </P>Research in estimating multilevel models (MLM) from complex survey data is quite recent.  Not only has this research resulted in several popular software packages incorporating sampling weights when estimating MLM, but has emphasized an important point often overlooked by both analysts and providers of survey data:  <EM>the sampling weights used for multilevel analysis need to be constructed differently than the sampling weights used for single-level analysis</EM>.  Both the distributors of data and the developers of MLM software packages often leave users responsible for proper scaling of MLM sampling weights.  In addition, the method of scaling can be different for the various MLM software packages.  To address this problem, we created Stata and SAS programs for constructing sampling weights for estimating two-level models that can be used with several popular multilevel software packages (gllamm (Stata), LISREL, MLwiN, Mplus).  Documentation is available to instruct analysts in using these programs.  We describe the weight components that the user must provide to our programs to create the two-level weights, provide information about several popular multilevel software packages that allow these sampling weights to be used in estimation, and instruct the analyst in downloading and running these programs.
<P> </P>
<P></P>
<P>
<TABLE cellSpacing=0 cellPadding=3 border=1>

<TR>
<TD class=tableHeader><a href="http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/Compute%20Weights%20for%20Multilevel%20Analysis.pdf" target="_blank" ><IMG src="http://www.cpc.unc.edu/extras/attachment.gif" border=0></A></TD>
<TD><a href="http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/Compute%20Weights%20for%20Multilevel%20Analysis.pdf" target="_blank" ><IMG src="http://www.cpc.unc.edu/extras/fileIcons/pdf.gif"></A>Compute_Weights_for_Multilevel_Analysis.pdf</TD></TR></TABLE></P>
<p>
<P><BR></P>
<H2>File Downloads</H2>
<P>NOTE: Installation and use instructions are found in the above PDF document.</P>
<H3>SAS</H3>
<UL>
<LI><a href="http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/mpml_wt.sas" target="_blank" >mpml_wt.sas</A>
<LI><a href="http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/pwigls.sas" target="_blank" >pwigls.sas</A> </LI></UL>
<H3>Stata</H3>
<P>You can install directly using the Stata command net install command:</P>
<P courier new,courier,monospace"> net install pwigls, from (http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/) replace</P>
<P courier new,courier,monospace"> net install mpml_wt, from (http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/) replace </P>
<P>Or, you can download the files below and install them manually: </P>
<UL>
<LI><a href="http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/mpml_wt.ado" target="_blank" >mpml_wt.ado</A>
<LI><a href="http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/mpml_wt.hlp" target="_blank" >mpml_wt.hlp</A>
<LI><a href="http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/pwigls.ado" target="_blank" >pwigls.ado</A>
<LI><a href="http://www.cpc.unc.edu/restools/data_analysis/ml_sampling_weights/pwigls.hlp" target="_blank" >pwigls.hlp</A> </LI></UL>
<P>
<p></DIV>

<H1>Topics in SAS Programming </H1>
<P>The topics in this tutorial have been selected to represent some of the most important tools in SAS for working with complex survey data.   The focus is on the SAS data step language and some of the most basic SAS procedures you need to manipulate data in various ways, to manage it, and to prepare it for analysis. </P>
<P>Some knowledge of the SAS data step is assumed and can be reviewed in the first section "Review of the data step and how it works."  The remaining topics--retained variables, BY groups, merging, and SAS arrays--are presented without assuming prior knowledge of these concepts.  After introducing each concept with the simplest of examples, applications to real data are given.  The section "Miscellaneous Tips and Tricks" summarizes useful information on a variety of topics including the two different SAS work environments (batch and interactive), SAS options, and the Output Delivery System. <BR></P>
<p>
<HR>
SAS example programs on SAS's tech support site:<BR><a href="http://support.sas.com/techsup/sample/testbase.html" target="_blank" >Example programs to do data management. </A><BR><a href="http://support.sas.com/techsup/sample/proc.html" target="_blank" >Example of using SAS procedures </A><BR>Browse the pages for your desired example, and then click the "Full code" tab to see the program. <BR>
<p>
<p>
<HR>
Other useful resources:<BR><a href="http://www.cpc.unc.edu/intranet/services/computer/faqs?func=view&amp;wid=3312&amp;category=SAS" target="_blank" >CPC's FAQs on SAS</A><BR><a href="http://support.sas.com/documentation/onlinedoc" target="_blank" >SAS's online documentation</A><BR><a href="http://www.unc.edu/atn/hpc/applications/index.shtml?id=4433" target="_blank" >UNC-CH's introduction to SAS</A> <BR><a href="http://support.sas.com/" target="_blank" >SAS's Technical Support page</A>   <BR><a href="http://support.sas.com/ctx/samples/" target="_blank" >SAS's code samples page</A>  <BR>

<H1>SAS II: Inferential Statistics</H1>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#Section target="_blank" >Section 1: Introduction</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#1. target="_blank" >About this Document</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#1. target="_blank" >Prerequisites</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#Section target="_blank" >Section 2: Setting Up the Data</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#2. target="_blank" >Introduction to the data</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#2. target="_blank" >Syntax Conventions</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#2. target="_blank" >Formatting Data</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#Section target="_blank" >Section 3: Summarizing and Describing Data</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#3. target="_blank" >Descriptive Statistics</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#3. target="_blank" >Frequencies</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#3. target="_blank" >The Output Delivery System</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#3. target="_blank" >Crosstabulations</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#Section target="_blank" >Section 4: Inferential Statistics</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#4. target="_blank" >Chi-Square</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#4. target="_blank" ><I>T</I>-test</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#4. target="_blank" >Correlation</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#4. target="_blank" >Regression</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#4. target="_blank" >General Linear Model</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#4. target="_blank" >Univariate GLM</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#4. target="_blank" >Multivariate GLM</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASII/sasstats.html#References" target="_blank" >References</A> </LI></UL>

<H1>SAS Analyst for Windows Tutorial</H1>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#About" target="_blank" >Section 1: Introduction</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#About" target="_blank" >About this Document</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Intro" target="_blank" >Introduction to Version 8 of SAS</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Section2" target="_blank" >Section 2: An Overview of SASV.8 for Windows</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Section2" target="_blank" >Navigating through SAS for Windows</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Explorer_Results" target="_blank" >The Explorer/Results Window</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Program" target="_blank" >The Program Editor</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Enhanced" target="_blank" >The Enhanced Program Editor</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Output" target="_blank" >The Output Window</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Log" target="_blank" >The Log Window</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Section3" target="_blank" >Section 3: Importing Data into SAS</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Intro-sec3" target="_blank" >Introduction</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#SAS_Library" target="_blank" >Creating a SAS Library</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Import_Wizard" target="_blank" >Using the Import Wizard</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Section4" target="_blank" >Section 4: The Analyst Application</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Section5" target="_blank" >Section 5: Data Transformations</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Compute" target="_blank" >Computing New Variables</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Recode" target="_blank" >Recoding Variables</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Section6" target="_blank" >Section 6: Descriptive Statistics</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Frequencies" target="_blank" >Frequencies</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Summary" target="_blank" >Summary Statistics</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/sas8/index.html#Distributions" target="_blank" >Distributions</A> </LI></UL></LI></UL>

<H1>SAS I: Getting Started</H1>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#Section target="_blank" >Section 1: Introduction</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#1. target="_blank" >About this Document</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#1. target="_blank" >Prerequisites</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#1. target="_blank" >Documentation</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#1. target="_blank" >Accessing SAS</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#1. target="_blank" >Getting Help</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#Section target="_blank" >Section 2:Setting Up the Data</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#2. target="_blank" >Introduction to the data</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#Section target="_blank" >Section 3: An Overview of SAS V.9 for Windows</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#3. target="_blank" >Starting and Navigating the Components of SAS for Windows</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#3. target="_blank" >The Explorer and Results Windows</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#3. target="_blank" >The Enhanced Program Editor</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#3. target="_blank" >The Output and Results Window</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#3. target="_blank" >The Log Window</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#Section target="_blank" >Section 4: SAS Programming Steps</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#4. target="_blank" >Introduction</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#4. target="_blank" >The Data Step</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#4. target="_blank" >The Procedure Step</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#4. target="_blank" >Syntax Conventions</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#Section target="_blank" >Section 5: Data Step Basics: How to read and format your data in SAS</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#5. target="_blank" >Introduction</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#5. target="_blank" >SAS Data Sets</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#5. target="_blank" >SAS Data Set Names</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#5. target="_blank" >Reading In-Stream Data</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#5. target="_blank" >Reading Data From an External File</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#5. target="_blank" >Reading in an Excel Spreadsheet</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#5. target="_blank" >Reading in an SPSS Data File</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#5. target="_blank" >Formatting Data</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#Section target="_blank" >Section 6: Intermediate Data Management and Programming</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#6. target="_blank" >Creating New Variables</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#6. target="_blank" >Subsetting Data</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#6. target="_blank" >Examining the Log</A> </LI></UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#Section target="_blank" >Section 7: The Procedure Step</A>
<UL>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#7. target="_blank" >Introduction</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#7. target="_blank" >Data Manipulation/Display Procedures</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#7. target="_blank" >Analytical Procedures</A>
<LI><a href="http://www.utexas.edu/its/rc/tutorials/stat/sas/SASI/sasgettingstarted.html#7. target="_blank" >Frequencies</A> </LI></UL></LI></UL>