[Genabel-commits] r817 - pkg/VariABEL/man
noreply at r-forge.r-project.org
noreply at r-forge.r-project.org
Tue Dec 6 10:41:02 CET 2011
Author: maksim
Date: 2011-12-06 10:41:02 +0100 (Tue, 06 Dec 2011)
New Revision: 817
Modified:
pkg/VariABEL/man/var_test_gwaa.Rd
Log:
change ecodding from ISO-8859 to ASCII. Otherwise checking fail...
Modified: pkg/VariABEL/man/var_test_gwaa.Rd
===================================================================
--- pkg/VariABEL/man/var_test_gwaa.Rd 2011-12-06 01:56:31 UTC (rev 816)
+++ pkg/VariABEL/man/var_test_gwaa.Rd 2011-12-06 09:41:02 UTC (rev 817)
@@ -2,63 +2,65 @@
\alias{var_test_gwaa}
\title{Function performs compariosn of genotypic variances.}
\description{
-Presence of significant difference of genotypic variances points to possible
- Significant variance difference points to possible presence of interaction between a tested SNP and a factor (or set of factors).
+ Presence of significant difference of genotypic variances points to possible
+ Significant variance difference points to possible presence of interaction between a tested SNP and a factor (or set of factors).
}
\usage{
-var_test_gwaa(formula, genodata, phenodata, genodata_info=NULL, testname="sqlm", analysis_type="AAvsABvsBB")
+ var_test_gwaa(formula, genodata, phenodata, genodata_info=NULL, testname="sqlm", analysis_type="AAvsABvsBB")
}
\arguments{\item{formula}{Regression model used for analysis. In the first stage linear regression is run to exclude main snp effect. In this stage adjustment for covariates is performed.}
-\item{genodata}{The genotypes data in format of genabel or databel object.}
-\item{phenodata}{The phenotypes data in format of data.frame object.}
-\item{genodata_info}{The file with snp information (name, position). Used if genodata is databel object.}
-\item{testname}{Name of variance heterogeneity test to perform. sqlm (for imputed genotype data), levene, and bartlett test are supported.}
-\item{analysis_type}{Type of analsysis to perform. AAvsABvsBB - additive model where B allele additivly increase risk, AAvsABandBB - group AA tested agains AB and BB, ABvsAAandBB - AB against AA and BB, BBvsAAandAB - BB against AA and AB. Only available for typed snps.}
+ \item{genodata}{The genotypes data in format of genabel or databel object.}
+ \item{phenodata}{The phenotypes data in format of data.frame object.}
+ \item{genodata_info}{The file with snp information (name, position). Used if genodata is databel object.}
+ \item{testname}{Name of variance heterogeneity test to perform. sqlm (for imputed genotype data), levene, and bartlett test are supported.}
+ \item{analysis_type}{Type of analsysis to perform. AAvsABvsBB - additive model where B allele additivly increase risk, AAvsABandBB - group AA tested agains AB and BB, ABvsAAandBB - AB against AA and BB, BBvsAAandAB - BB against AA and AB. Only available for typed snps.}
}
\details{
-The function var_test_gwaa tests for difference in genotypic variances. This difference points to presence of possible interaction between the tested SNP
-and some factor. In the case sqlm test the analysis consists of two stage: firstly the regular GWA id done where regression analysis is performed with
-covariates specified in the input parameter formula, in the second stage the regression analysis is performed with using residuals from the first stage and
-a sno as a covariate.
+ The function var_test_gwaa tests for difference in genotypic variances. This difference points to presence of possible interaction between the tested SNP
+ and some factor. In the case sqlm test the analysis consists of two stage: firstly the regular GWA id done where regression analysis is performed with
+ covariates specified in the input parameter formula, in the second stage the regression analysis is performed with using residuals from the first stage and
+ a sno as a covariate.
}
\value{
- The ouput is a data.frame object. The table contains the chisq of variance heterogeneity test (the name is chisq) the effects and standart errors of all covariates included into regression model,
- main snp effect (the names are snp_eff and snp_se). In the case of sqlm test the columns snp_eff_dispertion and snp_se_dispertion contain
- effect of a snp on squared vallues of a trait.
+ The ouput is a data.frame object. The table contains the chisq of variance heterogeneity test (the name is chisq) the effects and standart errors of all covariates included into regression model,
+ main snp effect (the names are snp_eff and snp_se). In the case of sqlm test the columns snp_eff_dispertion and snp_se_dispertion contain
+ effect of a snp on squared vallues of a trait.
- }
+ }
%\references{ http://www.biomedcentral.com/1471-2156/11/92/abstract }
\author{Maksim Struchalin}
%\note{ ~~further notes~~
-%}
-%\seealso{
-% \code{\link{var.meta}},
-%}
-\examples{
- if (require(GenABEL)) {
- data(srdta)
- result1 <- var_test_gwaa(bt~qt1+qt2, genodata=gtdata(srdta), phenodata=phdata(srdta))
-
+ %}
+ %\seealso{
+ % \code{\link{var.meta}},
+ %}
+ \examples{
+ if (require(GenABEL)) {
+ data(srdta)
+ result1 <- var_test_gwaa(bt~qt1+qt2, genodata=gtdata(srdta), phenodata=phdata(srdta))
+
#if there is no covariates needed:
- result2 <- var_test_gwaa("bt", genodata=gtdata(srdta), phenodata=phdata(srdta))
- }
+ result2 <- var_test_gwaa("bt", genodata=gtdata(srdta), phenodata=phdata(srdta))
+ }
-}
+ }
\references{
- Struchalin et al., Variance heterogeneity analysis for detection of potentially
- interacting genetic loci: method and its limitations.
- BMC Genetics 2010, 11:92, doi:10.1186/1471-2156-11-92
-
- Struchalin et al., An R package ÓVariABELÓ for genome-wide searching of
- potentially interacting loci by testing genotypic variance heterogeneity. Submitted.
-
+ Struchalin et al., Variance heterogeneity analysis for detection of potentially
+ interacting genetic loci: method and its limitations.
+ BMC Genetics 2010, 11:92, doi:10.1186/1471-2156-11-92
+
+ Struchalin et al., An R package VariABEL for genome-wide searching of
+ potentially interacting loci by testing genotypic variance heterogeneity. Submitted.
+
}
% Add one or more standard keywords, see file 'KEYWORDS' in the
% R documentation directory.
\keyword{manip}
+
+
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