What's new in December, 2010

Stata

• FAQ: How can I generate fungible regression weights?

What's New in November, 2010

R

• FAQ: How does R handle date values?
• FAQ: How can I add features or dimensions to my bar plot?

SAS

• FAQ: How can I generate pdf and html files for my SAS output?

SPSS

• Library: Making graphs with the ggraph command and GPL

Stata

• FAQ: How can I analyze a nested model using xtmixed?
• FAQ: Why don't my anova and regression results agree?
• Textbook Example: Methods Matter by Richard J. Murnane and John B. Willett

What's New in October, 2010?

R

• FAQ: How can I explain a continuous by continuous interaction?
• FAQ: How can I manage R packages?

Stata

• FAQ: How can I estimate probabilities with xtmelogit?
• Program: regvalidate -- Postestimation command to perform validation using resampling (findit regvalidate).
  

What's New in September, 2010?

SPSS

• Class Notes: Introduction to SPSS Version 17.0

Stata

• Seminar: Applied Survey Data Analysis in Stata 11

What's New in July, 2010?

R

• FAQ: How does R handle missing values?

SPSS

• FAQ: How can I write a Python program to rename variables in SPSS?

What's New in June, 2010?

R

• FAQ: How can I identify the first and last observations within a group in R?
• Textbook Example: Multilevel Analysis Techniques and Applications by Joop Hox, Chapter 4

SAS

• Code Fragment: Many paired t-tests
• FAQ: How can I reshape pairs data long to wide?

Stata

• FAQ: How can I use margins to understand a categorical by categorical by continuous 3-way interaction? (Stata 11)

What's New in May, 2010?

SAS

• FAQ: How can I overlay density plots of different variables by group in SAS?

SPSS

• FAQ: What are some of the differences between the compute, create and shift values commands?

Stata

• FAQ: How can I perform mediation with binary variables?
• Code Fragment: Creating and extending boxplots using twoway graphs

What's New in April, 2010?

R

• Textbook Example: Multilevel Analysis by Joop Hox, Chapter 2

SAS

• FAQ: How can I generate a map in SAS using an external shape file?

SPSS

• FAQ: How can I perform a Sobel test on a single mediation effect in SPSS?
• FAQ: How can I analyze multiple mediators in SPSS?

Stata

• FAQ: How can I create dyad IDs?

What's New in March, 2010?

R

• FAQ: How can I get Type III tests of fixed effects in R?

SPSS

• FAQ: What kinds of new variables can I make with the create command?
  
• Code Fragment: Numbering groups consecutively

Stata

• FAQ: How can I do mediation analysis with a categorical IV in Stata?
  
• FAQ: More of how can I use the margins command to understand multiple interactions in regression? (Stata 11)
  

What's New in February, 2010?

SPSS

• FAQ: How can I loop through two lists of variables?

Stata

• FAQ: How do I use the anovalator command? (Stata 11)
• FAQ: How can I do simple main effects using anovalator? (Stata 11)
• FAQ: How can get anova main-effects with dummy coding using margins? (Stata 11)
• FAQ: How can I do factor analysis with missing data in Stata?
• FAQ: How do I document and search a Stata dataset?

What's New in January, 2010?

R

• FAQ: How can I format a string containing a date into R "Date" object?
• Textbook Example: Multilevel Analysis Techniques and Applications by Joop Hox, Chapter 7

SAS

• FAQ: How can I create contrasts with proc logistic?

Stata

• FAQ: How can I use the margins command with a 3-way anova interaction? (Stata 11)
• FAQ: How can I do anova contrasts using the margins command? (Stata 11)
• FAQ: Why doesn't the margins command work with a nested factor in anova? (Stata 11)