Ch1A-lookup: Lookup values for a piecewise constant function

In PwrGSD: Power in a Group Sequential Design

Description

Given the values and lefthand endpoints for intervals of constancy, lookup values of the function at arbitrary values of the independent variable.

Usage

  lookup(xgrid, ygrid, x, y0 = 0)

Arguments

xgrid	Lefthand endpoints of intervals of constancy
ygrid	Values on these intervals, of same length as xgrid
x	Input vector of arbitrary independent variables.
y0	Value to be returned for values of x that are smaller than min(xgrid).

Value

~Describe the value returned If it is a LIST, use

comp1	Description of 'comp1'
comp2	Description of 'comp2'

Author(s)

Grant Izmirlian <[e-mail]>

Examples

  ## none as yet

Example output

Loading required package: survival
PwrGSD 2.3.1

PwrGSD documentation built on Dec. 11, 2021, 9:43 a.m.