Groningen Growth and Development Centre 10-Sector Database
Fast Grouping / _collapse_ Grouping Objects
Transform Data by (Grouped) Replacing or Sweeping out Statistics
Fast Row/Column Arithmetic for Matrix-Like Objects
Detailed Statistical Description of Data Frame
Small Functions to Make R Programming More Efficient
Fast (Weighted) F-test for Linear Models (with Factors)
Fast (Grouped, Weighted) Statistical Functions for Matrix-Like Objects
Fast Between (Averaging) and (Quasi-)Within (Centering) Transformations
Fast (Grouped, Ordered) Cumulative Sum for Matrix-Like Objects
Fast (Quasi-, Log-) Differences for Time Series and Panel Data
Fast (Grouped) First and Last Value for Matrix-Like Objects
Fast Growth Rates for Time Series and Panel Data
Higher-Dimensional Centering and Linear Prediction
Fast Lags and Leads for Time Series and Panel Data
Fast (Grouped, Weighted) Mean for Matrix-Like Objects
Fast (Grouped) Maxima and Minima for Matrix-Like Objects
Fast (Grouped, Weighted) Statistical Mode for Matrix-Like Objects
Fast (Grouped) Distinct Value Count for Matrix-Like Objects
Fast (Grouped) Observation Count for Matrix-Like Objects
Fast (Grouped, Weighted) N'th Element/Quantile for Matrix-Like Objects
Fast (Grouped, Weighted) Product for Matrix-Like Objects
Fast (Weighted) Sample Quantiles and Range
Fast (Grouped, Weighted) Scaling and Centering of Matrix-like Objects
Fast (Grouped, Weighted) Sum for Matrix-Like Objects
Fast Transform and Compute Columns on a Data Frame
Fast (Grouped, Weighted) Variance and Standard Deviation for Matrix-Like Objects
Determine the Depth / Level of Nesting of a List
Auto- and Cross- Covariance and Correlation Function Estimation for Panel Series
(Pairwise, Weighted) Correlations, Covariances and Observation Counts
Fast Factor Generation, Interactions and Vector Grouping
Fast (Grouped, Weighted) Summary Statistics for Cross-Sectional and Panel Data
Recursively Apply a Function to a List of Data Objects
Recode and Replace Values in Matrix-Like Objects
Row-Bind Lists / Data Frame-Like Objects
Fast Select, Replace or Add Data Frame Columns
Generate Group-Id from Integer Sequences
Generate Integer-Id From Time/Date Sequences
Recursive Row-Binding / Unlisting in 2D - to Data Frame