Citation: Lareau CA, White BC, Montgomery C and McKinney BA (2015). dcVar: A Method for Identifying Common Variants that Modulate Differential Correlation Structures in Gene Expression Data. Front. Genet. 6:312. doi: 10.3389/fgene.2015.00312
Command Line
dcVar
and has the following command line options:
Required Input Files
--bfile arg
- plink .bed/.bim/.fam file prefix containing SNPs
--numeric-file arg
- inbix format matrix of individuals (rows) by transcripts (columns)
Optional Commands
--dcvar-pfilter
- Enable p-value filtering
--dcvar-pfilter-value arg
- P-value filter value
--dcvar-pfilter-type arg
- P-value filter type {bon|fdr}
--var-model arg
- dom, rec, hom
Help
--help
- Displays this screen
Example Usage
./dcVar --bfile plinkBfile --numeric-file transcripts.num --out example
HapMap3 dcVar Analysis
Full annotated output from the HapMap3 dcVar analysis described in Lareau et al. The first and third columns show the ILMN probe IDs that were differentially correlated
when conditioning on the variant in column 5. Gene symbols were annotated to the probe IDs in columns 2 and 4. The interaction score from STRING (string-db.org) for the two genes is listed in column 6 as well a genome-wide association annotation from NHGRI (https://www.genome.gov/26525384) from general population studies in column 7.
Probes that did not readily map to a particular gene ID, gene pairs that lacked an interaction score from STRING or variants that did not carry a GWAS annotation were
labeled with “#NA#” in their respective columns.
Tutorial
Using the R Version
-
Download dcVar.R, and use your favorite editor to set the various files and run options. Use the
source("dcVar.R")
command or an IDE like RStudio to run dcVar with your settings.
Installating the C++ Version
- Download dcVar-1.0 and unzip the file.
- Install Armadillo library if not already installed.
-
Build the
dcVar
executable program with the command:
make -f Makefile.dcVar
ormake -f Makefile.dcVar.osx
for Mac OSX. -
Install the
dcVar
executable program to/usr/local/bin
with the command:sudo make -f Makefile.dcVar install
.