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.
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
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.
