R
base
Cumulative Sums, Products, and Extremes
Form Row and Column Sums and Means
Test Objects for Exact Equality
datasets
Weight versus age of chicks on different diets
graphics
Identify Points in a Scatter Plot
Write Text into the Margins of a Plot
MASS
mgcv
Generalized Additive Mixed Models
Generalized additive models with integrated smoothness estimation
stats
Extract Model Coefficients