data_gen: Generate Synthetic Data with Various Structures

In spinebil: Investigating New Projection Pursuit Index Functions

Generate Synthetic Data with Various Structures

Description

Generates either:

• Structured (x, y) scatter data (linear, sine, circle, etc.), or

• A matrix of scaled orthogonal polynomial features.

Usage

data_gen(type = "all", n = 500, degree = NULL, seed = NULL)

Arguments

type	Character string. Options: "polynomial" for orthogonal polynomial features "linear", "sine", "circle", "cluster", "snake", "outliers", "sparse", "clumpy", "skewed", "striated", "concave", "monotonic", "doughnut", or "all" to generate all scatter structures.
n	Integer. Number of samples to generate. Default is 500.
degree	Integer. Degree of polynomial features (only for type = "polynomial").
seed	Optional integer. Sets random seed for reproducibility.

Value

• If type = "polynomial", returns a matrix (n x degree).

• Otherwise a tibble with columns:

• x: Numeric vector of x-values

• y: Numeric vector of y-values

• structure: Character name of the structure type

Examples

data_gen("linear", n = 200)
data_gen("polynomial", degree = 4, n = 200)
data_gen("all", n = 200)

spinebil documentation built on Nov. 5, 2025, 7:35 p.m.