estimateNumPerm: Compute the Number of Unique Permutations for a Phenotype...

In sigPathway: Pathway Analysis

Description

Computes the number of unique permutations based on a vector of phenotypes and the number of groups.

Usage

estimateNumPerm(phenotype, ngroups)

Arguments

phenotype	a numeric (or character if ngroups >= 2) vector indicating the phenotype
ngroups	an integer indicating the number of groups in the phenotype

Details

This function calculates the number of unique permutations based on the given phenotype and the number of groups present in the phenotype. This function is used internally in sigPathway and attempts to avoid numeric overflow associated with multiplying out large factorials.

Value

A numeric with length 1.

Author(s)

Weil Lai

Examples

## One group: continuous observations
ptype1 <- c(24,25,17,26,25,16,14,17,12,15,19,20)
print(estimateNumPerm(ptype1, 1))

## Two groups
ptype2 <- c(0,1,1,0,1,0,1)
print(estimateNumPerm(ptype2, 2))

## Three groups
ptype3a <- c(2,0,1,2,0,1,2,0,0,1,1,2)
print(estimateNumPerm(ptype3a, 3))

ptype3b <- c("Banana","Apple","Lemon","Lemon","Lemon",
             "Apple","Lemon","Banana","Banana")
print(estimateNumPerm(ptype3b, 3))

sigPathway documentation built on Nov. 8, 2020, 5:35 p.m.