What's New in December, 2009?

R

• FAQ: How can I estimate the standard error of a transformed parameter in R using the delta method?
• Code Fragment: Examples of using singular value decomposition in R

SAS

• FAQ: How can I get "adjusted" predicted values from a logistic model in SAS?
• FAQ: Where can I find more functions to create new variables?

Stata

• FAQ: How can I use the margins command to understand multiple interactions? (Stata 11)
• FAQ: How can I use multiply imputed data where original data is not included?
• FAQ: How can I use the margins command to understand multiple interactions in logistic regression? (Stata 11)
• FAQ: How can I get anova type results from xtmixed using the margins command? (Stata 11)

What's New in November, 2009?

SAS

• FAQ: How do I write a fixed-format file with right-justified values?

Stata

• FAQ: How can I graph the results of the margins command?

What's New in October, 2009?

HLM

• FAQ: How can I run HLM in batch mode?

R

• FAQ: How can I manage and plot social network data?
• FAQ: How can I generate bootstrap statistics in R?

Stata

• Code Fragment: Šidák-Holm Adjusted p-values
• FAQ: How can I sample from a dataset with frequency weights?
• Paper Example: Using Graphs Instead of Tables in Political Science, by Kastellec and Leoni
• FAQ: How can I sort data within rows independently for each observation?

What's New in September, 2009?

Mplus

• Seminar: Introduction to Using Mplus 5 Part I

R

• Code Fragment: Split-plot Factorial

SPSS

• FAQ: How can I move my data from SPSS to Mplus?

Stata

• FAQ: Part 1: How can I understand a 3-way continuous interaction? (Stata 11)
• FAQ: Part 2: How can I understand a 3-way continuous interaction? (Stata 11)
• FAQ: How can I understand a categorical by continuous interaction? (Stata 11)
• FAQ: How can I understand a categorical by categorical interaction in logistic regression? (Stata 11)

What's New in August, 2009?

Mplus

• FAQ: Which coefficients in a two-group regression or path model does Mplus constrain across groups by default?
• FAQ: Which coefficients in a two-group measurement model (CFA) does Mplus constrain across groups by default?

R

• FAQ: How do I fit a variogram model to my spatial data in R using regression commands?
• FAQ: How do I model a spatially autocorrelated outcome?

SAS

• FAQ: How do I model a spatially autocorrelated outcome?

SPSS

• FAQ: How can I form all possible pairs in my dataset?
• Code Fragment: Generating id numbers within group or panel

Stata

• FAQ: How can I get anova simple main effects revisited with Stata 11?
• FAQ: How can I understand a categorical by continuous interaction in logistic regression? (Stata 11)
• FAQ: How can I generate automated filenames in Stata?
• FAQ: How can I identify cases used by an estimation command using e(sample)?
• FAQ: How is the 95% CI of the variance component in a mixed model calculated?
• FAQ: How can get anova main-effects with dummy coding?
• FAQ: How can I understand a three-way interaction in anova? (Stata 11)
• FAQ: How can I get anova type III results using xtmixed?
• FAQ: How can I explain a continuous by continuous interaction? (Stata 11)

What's New in June, 2009?

SAS

• Code Fragment: Using the predict statement with nlmixed
• FAQ: How can I do zero-truncated count models using nlmixed?
• FAQ: Simple linear and nonlinear models using nlmixed

SPSS

• FAQ: How can I do repeated measures anova with covariates in SPSS?

Stata

• Code Fragment: Simple linear and nonlinear models using Stata's ml command
• Code Fragment: CFA using Mata optimize
• FAQ: How can I compute power for contingency tables in Stata?
• Code Fragment: Retrospective power analysis for anova
• FAQ: How can I identify cases used by an estimation command using e(sample)?

What's New in May, 2009?

General

• FAQ: How do I interpret the sign of the quadratic term in a polynomial regression?

R

• Code Fragment: How can I read multiple files into R?

SAS

• Code Fragment: Summary table for multiple regression models
• FAQ: How can I export my SAS results to an Excel spreadsheet?
• FAQ: How can I send SAS data/results to specific cells in an Excel spreadsheet?
• FAQ: How can I do path analysis in SAS?
• Code Fragment: Summary table for logistic regression models
• FAQ: How can I include cells with zero counts in proc freq with the list option?

SPSS

• FAQ: How can I convert string variables data into date variables?
• Code Fragment: Looping with dates
• FAQ: How can SPSS help me document my data?

Stata

• FAQ: How can I convert a multilevel model to a mixed model?
• FAQ: How can I access information stored after I run a command in Stata (returned results)?
• FAQ: How can I graph chi-square power curves in Stata?
• Code Fragment: Fitting a seemingly unrelated regression (sureg) manually
• FAQ: How can I reshape doubly (or triply) wide data to long?
• FAQ: How can I fit a random intercept or mixed effects model with heteroskedastic errors?

What's New in April, 2009?

SAS

• Code fragment: Random effect Tobit model in nlmixed
• FAQ: How can I bootstrap estimates in SAS?

Stata

• FAQ: How can I understand a categorical-by-categorical interaction in logistic regression?
• FAQ: How can I understand a categorical-by-continuous interaction in logistic regression?
• FAQ: How can I read binary data in Stata?

SPSS

• FAQ: How can I perform hypothesis tests in glm?
• Library: Inputting and manipulating dates in SPSS?

What's New in March, 2009?

General

• Frequently Asked Question: What's with the different formulas for kurtosis?

R

• Frequently Asked Question: How can I generate a Venn diagram in R?

SAS

• Textbook Example: Applied Longitudinal Data Analysis, Chapter 2 (Using 9.2)
• Textbook Example: Applied Longitudinal Data Analysis, Chapter 3 (Using 9.2)
• Textbook Example: Applied Longitudinal Data Analysis, Chapter 4 (Using 9.2)
• Textbook Example: Applied Longitudinal Data Analysis, Chapter 5 (Using 9.2)
• Textbook Example: Applied Longitudinal Data Analysis, Chapter 6 (Using 9.2)
• Frequently Asked Questions: How do I write out a fixed-format file in SAS?

Stata

• Frequently Asked Question: How can I analyze multiple mediators in Stata?
• Frequently Asked Question: How can I do moderated mediation in Stata?
• Frequently Asked Question: How can I compute effect size for regression in Stata?
• Frequently Asked Question: How can I get an R-squared with robust regression in Stata?
• Frequently Asked Question: How can I use xtline in Stata?
• Frequently Asked Question: How can I get a Somers' D after logistic regression in Stata?
• Frequently Asked Question: How can I create all pairs within groups in Stata?
• Stata Code Fragment: How can I generate automated filenames in Stata?