QuadApprox: QuadApprox function

In spatsurv: Bayesian Spatial Survival Analysis with Parametric Proportional Hazards Models

QuadApprox function

Description

A function to compute the second derivative of a function (of several real variables) using a quadratic approximation on a grid of points defined by the list argRanges. Also returns the local maximum.

Usage

QuadApprox(fun, npts, argRanges, plot = FALSE, ...)

Arguments

fun	a function
npts	integer number of points in each direction
argRanges	a list of ranges on which to construct the grid for each parameter
plot	whether to plot the quadratic approximation of the posterior (for two-dimensional parameters only)
...	other arguments to be passed to fun

Value

a 2 by 2 matrix containing the curvature at the maximum and the (x,y) value at which the maximum occurs

spatsurv documentation built on Oct. 19, 2023, 9:07 a.m.