FAQ: How do I perform multiple imputation using predictive mean matching in R?

What's new in June, 2013

R

• FAQ: How do I analyze survey data with a simple random sample design?
• FAQ: How do I analyze survey data with a stratified design with certainty PSUs?
• FAQ: How do I analyze survey data with a one-stage cluster design?
• FAQ: How do I analyze survey data with a probability proportional to size sampling design?
• FAQ: How do I analyze survey data with a stratified random sampling design?
• FAQ: How do I analyze survey data with a systematic sample design?
• FAQ: How do I analyze survey data with a repeated systematic sample design?
• FAQ: How do I analyze survey data with a stratified random sampling with allocation to strata design?
• FAQ: How do I analyze survey data with stratification after sampling (poststratification)?
• FAQ: How can I do ratio estimation with survey data?
• FAQ: How can I do regression estimation with survey data?

Stata

• FAQ: How can I overlay two histograms?
• FAQ: How can I make a correlation matrix heat map?

What's new in May, 2013

Stata

• FAQ: Linear growth models: xtmixed vs sem

What's new in March, 2013

SPSS

• FAQ: How can I graph the predicted values from the fixed part of my mixed command?
• FAQ: How can I calculate time at dropout?

Stata

• FAQ: How can I read dates with both 2-digit and 4-digit year?

What's new in February, 2013

Stata

• FAQ: How can I do multilevel principal components analysis?
• DAE: Mixed Effects Logistic Regression
• FAQ: How can I compute predictive margins for xtmelogit with random effects?
• FAQ: How can I compute indirect effects with imputed data? (Method 2)
• FAQ: How can I compute indirect effects with imputed data? (Method 1)
• FAQ: How can I estimate effect size for xtmixed?

What's new in January, 2013

Stata

• Class: Repeated Measures Analysis with Stata
• FAQ: How can I do moderated mediation with a categorical moderator using sem?
• FAQ: How can I get Monte Carlo standard errors for indirect effects?

R

• Data Analysis Example: Mixed Effects Logistic Regression

What's new in December, 2012

Stata

• FAQ: How can I do moderated mediation with a categorical moderator in Stata?

What's new in November, 2012

General

• Introduction to Generalized Linear Mixed Models

What's new in September, 2012

Stata

• FAQ: How can you get 3-way, 4-way, 5-way or more cross tabulation in Stata?
• FAQ: How can I anonymize patient IDs and still be able to decode them, if necessary?

R

• DAE: Interval Regression Includes 3d animated predicted regression surface.

What's New in August, 2012

R

• Data Analysis Example: Zero-truncated Poisson Regression
• Data Analysis Example: Zero-truncated Negative Binomial Regression
• Data Analysis Example: Truncated Regression

SAS

• Code Fragment: Reading and Analyzing the Hospital Doctor Patient Dataset

SPSS

• Code Fragment: Reading and Analyzing the Hospital Doctor Patient Dataset

Stata

• FAQ: Why doesn't the test of the overall survey regression model in Stata match the results from SAS and SUDAAN?
• Code Fragment: Reading and Analyzing the Hospital Doctor Patient Dataset
• Code Fragment: Compute Adjusted Values from Cox Model using Mata
• Code Fragment: Generate Anonymous Keys using Mata

Mplus

• DAE: Zero-inflated negative binomial regression
• DAE: Zero-truncated negative binomial regression

What's New in July, 2012

R

• R Data Analysis Examples: (Approximate) Exact Logistic Regression
• FAQ: How can I visualize longitudinal data in ggplot2?
• FAQ: How can I make individual growth curves in ggplot2?
• FAQ: How can I explore different smooths in ggplot2?

Stata

• FAQ: How can I get margins for a multiply imputed survey logit model? (Stata 12)
• FAQ: Sample setups for commonly used survey data sets 

What's New in June, 2012

R

• Random coefficient poisson models
• Multivariate random coefficient model
• How can I perform mediation with multilevel data? (Method 2)
• R Advanced: Simulating the Hospital Doctor Patient Dataset

Stata

• Stata Code Fragment: Compute Dispersion using Mata (Stata 12)

SAS

• Zero Truncated Poisson Regression
• Zero Truncated Negative Binomial Regression

What's New in May, 2012

Stata

• FAQ: How can I compare indirect effects in a multiple group model? (Stata 12)

What's New in April, 2012

SPSS

• DAE Page: Multinomial Logistic Regression
• DAE Page: Ordinal Logistic Regression
• FAQ: How can I perform mediation with multilevel data? (Method 2)

SAS

• FAQ: How can I perform mediation with multilevel data? (Method 2)
• FAQ: How do I run a random effect tobit model using nlmixed?
• FAQ: How do I run a random effect zero-inflated poisson model using nlmixed?

Stata

• Compute SRMR from SEM using Mata
• Computing the Sum Difference Between Two Lattitude and Longitude Points using Mata

What's New in March, 2012

Stata

• FAQ: How can I get margins and marginsplot on multiply imputated data? (Stata 12)
• FAQ: How can I understand a categorical by continuous interaction in ologit? (Stata 12)

What's New in February, 2012

Stata

• FAQ: How can I estimate probabilities that include the random effects in xtmelogit? (revised)

What's New in January, 2012

Stata

• FAQ: Everything you always wanted to know about contrasts* (*But were afraid to ask)

What's New in December, 2011

Stata

• FAQ: How can I do classical ANOVA designs using xtmixed? (Stata 12)
• FAQ: How can I do CFA with binary variables?
• FAQ: How can I perform mediation with multilevel data? (Method 2)

What's New in November, 2011

SPSS

• FAQ: How can I test differences in means using a cell means model?

Stata

• FAQ: How can I access the random effects after xtmixed using _diparm?
• FAQ: What are the saturated and baseline models in sem?

What's New in September, 2011

Stata

• FAQ: How can I understand a three-way interaction in ANOVA? (Stata 12) [revised]
• FAQ: How can I read Stata 12 data files in Stata 11?
• FAQ: How can I test simple effects in repeated measures models? (Stata 12) [revised]
• FAQ: How can I understand a 3-way continuous interaction? (Stata 12)