| methodRule1 {choplump} | R Documentation |
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 |
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.
Value
a character vector with one of the following values: "approx","exact","exactMC"