borrControl: Algorithm variables used by borrTest.

In exact2x2: Exact Tests and Confidence Intervals for 2x2 Tables

Algorithm variables used by borrTest.

Description

Function that gives list of algorithm variables used by borrTest.

Usage

borrControl(nAlphaGrid=10000,nThetaGrid=1000, maxIter=0, digits=4, orderFunc=NULL)

Arguments

nAlphaGrid	number used for defining grid for searching over the (0,1) space for significance levels. Used in borrOrderingAlphaGrid.
nThetaGrid	number of evenly spaced grid elements for searching over the (0,1) space for theta. Used in both borrOrderingAlphaGrid and and borrOrderingByRR.
maxIter	maximum number of searches over the alpha space. Used in borrOrderingAlphaGrid.
digits	number of digits for rounding alpha star values. Used in borrOrderingByRR.
orderFunc	character vector to determine function to do the borr ordering. NULL checks for precalculated values then does borrOrderingAlphaGrid. 'AlphaGrid' uses borrOrderingAlphaGrid and 'ByRR' uses borrOrderingByRR.

Details

In borrOrderingAlphaGrid we create a grid for searching over the significance level space, for the first calculation (zeroth iteration) we use alpha.seq where alpha.seq <- sort(unique(c( 10 ^ seq(log10(minAlpha), 0, length = nAlphaGrid / 2), seq(minAlpha, 10 ^ 0, length = nAlphaGrid / 2) ))), where minAlpha is the one-sided p-value at the point (x1=n1, x2=0) given by minAlpha<- dbinom(0,nT,nC/(nC+nT))*dbinom(nC,nC,nC/(nC+nT)). If there are ties and maxIter is greater than 0, then replace each tied value with an equally spaced grid (with nAlphaGrid elements) between the adjacent non-tied values. If the lowest value in the grid, minAlpha, is tied, then set minAlpha<-minAlpha/10 at the beginning of the iteration. Repeat this process up to maxIter times.

See borrOrderingInternal for more details of algorithms.

Examples

borrControl(nThetaGrid=10^3)

exact2x2 documentation built on May 29, 2024, 10:51 a.m.