| across | Apply Functions Across Multiple Columns |
| arithmetic | Fast Row/Column Arithmetic for Matrix-Like Objects |
| BY | Split-Apply-Combine Computing |
| collap | Advanced Data Aggregation |
| collapse-documentation | Collapse Documentation & Overview |
| collapse-options | _collapse_ Package Options |
| collapse-package | Advanced and Fast Data Transformation |
| collapse-renamed | Renamed Functions |
| colorder | Fast Reordering of Data Frame Columns |
| dapply | Data Apply |
| data-transformations | Data Transformations |
| descr | Detailed Statistical Description of Data Frame |
| efficient-programming | Small Functions to Make R Programming More Efficient |
| extract_list | Find and Extract / Subset List Elements |
| fast-data-manipulation | Fast Data Manipulation |
| fast-grouping-ordering | Fast Grouping and Ordering |
| fast-statistical-functions | Fast (Grouped, Weighted) Statistical Functions for... |
| fbetween_fwithin | Fast Between (Averaging) and (Quasi-)Within (Centering)... |
| fcount | Efficiently Count Observations by Group |
| fcumsum | Fast (Grouped, Ordered) Cumulative Sum for Matrix-Like... |
| fdiff | Fast (Quasi-, Log-) Differences for Time Series and Panel... |
| fdist | Fast and Flexible Distance Computations |
| fdroplevels | Fast Removal of Unused Factor Levels |
| ffirst_flast | Fast (Grouped) First and Last Value for Matrix-Like Objects |
| fFtest | Fast (Weighted) F-test for Linear Models (with Factors) |
| fgrowth | Fast Growth Rates for Time Series and Panel Data |
| fhdbetween_fhdwithin | Higher-Dimensional Centering and Linear Prediction |
| flag | Fast Lags and Leads for Time Series and Panel Data |
| flm | Fast (Weighted) Linear Model Fitting |
| fmatch | Fast Matching |
| fmean | Fast (Grouped, Weighted) Mean for Matrix-Like Objects |
| fmin_fmax | Fast (Grouped) Maxima and Minima for Matrix-Like Objects |
| fmode | Fast (Grouped, Weighted) Statistical Mode for Matrix-Like... |
| fndistinct | Fast (Grouped) Distinct Value Count for Matrix-Like Objects |
| fnobs | Fast (Grouped) Observation Count for Matrix-Like Objects |
| fnth_fmedian | Fast (Grouped, Weighted) N'th Element/Quantile for... |
| fprod | Fast (Grouped, Weighted) Product for Matrix-Like Objects |
| fquantile | Fast (Weighted) Sample Quantiles and Range |
| frename | Fast Renaming and Relabelling Objects |
| fscale | Fast (Grouped, Weighted) Scaling and Centering of Matrix-like... |
| fsubset | Fast Subsetting Matrix-Like Objects |
| fsum | Fast (Grouped, Weighted) Sum for Matrix-Like Objects |
| fsummarise | Fast Summarise |
| ftransform | Fast Transform and Compute Columns on a Data Frame |
| funique | Fast Unique Elements / Rows |
| fvar_fsd | Fast (Grouped, Weighted) Variance and Standard Deviation for... |
| GGDC10S | Groningen Growth and Development Centre 10-Sector Database |
| group | Fast Hash-Based Grouping |
| groupid | Generate Run-Length Type Group-Id |
| GRP | Fast Grouping / _collapse_ Grouping Objects |
| indexing | Fast Indexed Time Series and Panels |
| is_unlistable | Unlistable Lists |
| join | Fast Table Joins |
| ldepth | Determine the Depth / Level of Nesting of a List |
| list-processing | List Processing |
| pad | Pad Matrix-Like Objects with a Value |
| pivot | Fast and Easy Data Reshaping |
| psacf | Auto- and Cross- Covariance and Correlation Function... |
| psmat | Matrix / Array from Panel Series |
| pwcor_pwcov_pwnobs | (Pairwise, Weighted) Correlations, Covariances and... |
| qF | Fast Factor Generation, Interactions and Vector Grouping |
| qsu | Fast (Grouped, Weighted) Summary Statistics for... |
| qtab | Fast (Weighted) Cross Tabulation |
| quick-conversion | Quick Data Conversion |
| radixorder | Fast Radix-Based Ordering |
| rapply2d | Recursively Apply a Function to a List of Data Objects |
| recode-replace | Recode and Replace Values in Matrix-Like Objects |
| rowbind | Row-Bind Lists / Data Frame-Like Objects |
| roworder | Fast Reordering of Data Frame Rows |
| rsplit | Fast (Recursive) Splitting |
| select_replace_vars | Fast Select, Replace or Add Data Frame Columns |
| seqid | Generate Group-Id from Integer Sequences |
| small-helpers | Small (Helper) Functions |
| summary-statistics | Summary Statistics |
| timeid | Generate Integer-Id From Time/Date Sequences |
| time-series-panel-series | Time Series and Panel Series |
| t_list | Efficient List Transpose |
| TRA | Transform Data by (Grouped) Replacing or Sweeping out... |
| unlist2d | Recursive Row-Binding / Unlisting in 2D - to Data Frame |
| varying | Fast Check of Variation in Data |
| wlddev | World Development Dataset |
