choplump (version 1.0-0.3)

methodRule1: Rule for determining method for choplump function

Description

This is the default function which determines which method to use in choplump.

Usage

methodRule1(W,Z, exact, parms)

Arguments

W

numeric vector of response scores, usually many zeros and the rest positive

Z

group membership vector, values all 0 (control) or 1 (treated)

exact

logical, TRUE=exact method, FALSE=approximate method, NULL=see below

parms

numeric value of maximum number of calculations of test statistic, if number of calculations greater than parms then use Monte Carlo for exact method

Value

• a character vector with one of the following values: "approx","exact","exactMC"

Details

This function determines which of several methods will be used in choplump; see that help for description of methods. When exact=FALSE then returns 'approx'. When exact=TRUE then returns either 'exact' if the number of calculations of the test statistic is less than or equal to parms or 'exactMC' otherwise. When exact=NULL then returns either 'exact' if the number of calculations of the test statistic is less than or equal to parms or or 'approx' otherwise.

See Also

choplump