Generates a sequence of integers from 1 to a specified length.

Generates sequences of numbers.

Replicates values to create a vector or array.

Returns the indices of the elements that are TRUE in a logical vector.

Provides a vectorized way to perform conditional (if-else) operations on elements of a vector.

Extracts or sets the levels of a factor.

Converts a vector into a factor, which represents categorical data.

Divides a numeric vector into intervals (bins) and labels each interval.

Applies a function to the data in each group of a data frame.

Groups a data frame by one or more variables.

Orders rows of data frames based on column values.

Adds new columns or modifies existing columns in data frames.

Fits analysis of variance (ANOVA) models for comparing means across multiple groups.

Selects columns from data frames.

Filters rows of data frames based on specified conditions.

Performs chi-squared tests of independence and goodness-of-fit.

Performs Wilcoxon signed-rank tests and Wilcoxon rank sum tests (Mann-Whitney tests).

Performs the Kolmogorov-Smirnov test for comparing the distribution of a sample to a specified distribution.

Fits generalized linear models to data.

Fits linear models to data.