| collapse_responseset | Collapse multiple response sets to single variable | 
| collapse_responseset.data.frame | Collapse multiple response sets to single variable | 
| collapse_responseset.default | Collapse multiple response sets to single variable | 
| count_na | Count the number of NAs in each row or in each column | 
| d.eta | Sample data set for eta function examples | 
| d.ngo | NGO Dataset | 
| d.superiority | Student self assessment data | 
| eta | Eta coefficient for nominal/interval data. | 
| foo | A function to demonstrate how an R function is defined. | 
| intervals | Use standard mathematical interval notation in 'recode' from 'car' package | 
| nom.lambda | Calculate Lambda for nominal data tables. | 
| nom.uncertainty | Calculate the Uncertainty Coefficient (Theil's U) | 
| ord.gamma | Calculate Goodman-Kruskal gamma for ordinal data tables. | 
| ord.somers.d | Calculate Somers' d for ordinal data tables. | 
| ord.tau | Calculate Kendall's Tau statistics for ordinal data tables (Tau-b and Tau-c). | 
| qqnorm_spss | SPSS like QQ-plot | 
| recode2 | Wrapper for 'recode' from 'car' to allow to recode multiple columns at once | 
| rowMeans2 | Form row means taking into account a minimum number of values required | 
| ryouready | 'ryouready': An R package to accompany the 'R you ready?' R book |