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gap (version 1.1-1)

gap-internal: Internal functions for gap

Description

These are internal functions.

PARn calculates population attributable risk (PAR) for a list of frequencies and relative risks (RRs).

HapDesign and HapFreqSE both accept a haplo.em object to derieve a design/dosage matrix and standard error of haplotype frequency estimates. The former is appropriate for haplotype trend regression (HTR), e.g., within the generalized linear model (GLM) framework to be equivllant to a formal approach as implemented in the package haplo.stats and hap.score. However, they are expected to be compatible with objects from gc.em() gc.em and hap.em. The two functions are included as courtesy of Prof Andrea Foulkes from the useR!2008 tutorial.

a2g gives allele-to-genotype conversion.

g2a returns two alleles according to a genotype identifier.

g2a.c is the C version of g2c.

gc.control() is used by gc.em().

gcode is as a2g.

grec2g is undocumented.

ReadGRMBin is a function to read GCTA grm.bin file, modified from GCTA documentation

h2GE is a utility function for heritability involving gene-environment interaction

h2l is a utility function for converting observed heritability to its counterpart under liability threshold model

hap.control() is used by hap.em().

hap.score.glm, hap.score.podds are used by hap.score().

is.miss is undocumented.

KCC calculates disease prevalences in cases and controls for a given genotype relative risk, allele frequency and prevalencen of the disease in the whole population. It is used by tscc and pbsize2.

k obtains 1st and 2nd order culumants for correlation coefficient.

m2plem is an experimental function for PLEM format.

micombine is used to combine imputation results.

plem2m is also experimental for PLEM format.

revhap recovers the allele indices for a given haplotype ID in a multiallelic system.

revhap.i is similar to revhap.

solve.skol is a function used by tscc.

toETDT a function used to experiment with ETDT.

ungcode recovers alleles from genotype(s).

VR is a utility function for calculating variance of a ratio

x2 is a simple chi-squared test of two proportions.

z is a normal z-test of two proportions used by tscc.

Usage

a2g(a1,a2)
g2a(g)
g2a.c(g)
ReadGRMBin(prefix, AllN=FALSE, size=4)
h2GE(V,VCOV)
h2l(K=0.05,P=0.5,h2,se)
KCC(model,GRR,p1,K)
revhap(loci,hapid)
VR(v1,vv1,v2,vv2,c12)

Arguments

a1
Allele 1
a2
Allele 2
g
A genotype identifier
model
One of "multiplicative", "additive", "recessive", "dominant", "overdominant"
GRR
Genotype relative risk
p1
Frequency of the risk allele
K
Prevalence of disease in the population
loci
A vector of number of alleles at all loci
hapid
Haplotype identifier

Details

These functions are not so frequently called by users