trapz: Numerical integration using the trapezoidal rule

In dRiftDM: Estimating (Time-Dependent) Drift Diffusion Models

Numerical integration using the trapezoidal rule

Description

These are internal helper functions to perform numerical integration via the trapezoidal rule. The workhorse is internal_trapz(), which computes the full integral or returns the cumulative integral.

Usage

internal_trapz(x, y, return_cumsum = FALSE)

cumtrapz(x, y)

trapz(x, y)

Arguments

x	numeric vector of strictly increasing x-values.
y	numeric vector of function values at x.
return_cumsum	logical, if TRUE return the cumulative integral at each point in x (starting with 0), if FALSE return the total integral.

Details

• internal_trapz(x, y, return_cumsum = FALSE): core implementation

• trapz(x, y) wrapper for internal_trapz(x, y, FALSE), returns the total integral.

• cumtrapz(x, y) wrapper for internal_trapz(x, y, TRUE), returns the cumulative integral.

Value

• trapz(): a single numeric value

• cumtrapz(): numeric vector of cumulative integrals (starting with 0)

• internal_trapz(): either of the above, depending on return_cumsum

dRiftDM documentation built on Dec. 1, 2025, 5:08 p.m.