DosageConvertor
- Download/Re-Clone Release Version 1.0.4 (Updated July 2017) !
Introduction
DosageConvertor is a C++ tool to convert dosage files (in VCF format) from Minimac3/4 to other formats such as MaCH or PLINK.
Download
VERSION: 1.0.4 (Updated 7.12.2017) !
[NOTE: Cloning from GitHub is recommened so that updates can be easily pulled back]
Description | Download Link |
---|---|
Github Repository | |
Source Files | |
Binary Executable †
(Ubuntu 4.8.4) |
† Binary executables are NOT guaranteed to run on every LINUX machine. Please compile from source files if you have trouble with the executable, or clone from the github repository. Else contact the author Sayantan Das.
Installation
Users should follow the following steps to compile DosageConvertor (if they downloaded the source files).
## EXTRACT M3VCFTOOLS AND COMPILE wget ftp://share.sph.umich.edu/minimac3/DosageConvertor/DosageConvertor.v1.0.3.tar.gz tar -xzvf DosageConvertor.v1.0.3.tar.gz cd DosageConvertor/ make
Usage
Convert to PLINK Files
The following command will convert a input VCF dosage file to a PLINK dosage file, which can be used for downstream analysis using PLINK1.9 or PLINK2.0.
./DosageConvertor --vcfDose TestDataImputedVCF.dose.vcf.gz --info TestDataImputedVCF.info (optional) --prefix OutPrefix --type plink (default) --format 1 (or 2,3)
This command will create three files : OutPrefix.plink.dosage.gz
, OutPrefix.fam
, and OutPrefix.map
. The .fam
and .map
formats are described here. The --format
parameter can take values 1, 2, or 3. Each of these values correspond to the three different PLINK dosage file formats (details on PLINK dosage files are given here). Note that the generated OutPrefix.map
does NOT contain any phenotype information (which will need to be manually edited before PLINK can perform association tests). The OutPrefix.fam
will NOT contain sex information unless chromosome X is available. See Converting Chromosome X Files for details.
Convert to MaCH Files
The following command will convert an input VCF dosage file to a MaCH/minimac dosage file (the format for previous versions of minimac). The generated dosage files can be tested for association using mach2dat.
./DosageConvertor --vcfDose TestDataImputedVCF.dose.vcf.gz --info TestDataImputedVCF.info (optional) --prefix OutPrefix --type mach --format 1 (or 2)
When --type mach
is used, the --format
parameter can only take values 1 or 2.
- If the value is 1, the code generates
OutPrefix.mach.dose.gz
andOutPrefix.info
, whereOutPrefix.mach.dose.gz
contains the expected alternate allele count (one value per sample per marker). - If the value is 2, it generates
OutPrefix.mach.gprob.gz
andOutPrefix.info
, whereOutPrefix.mach.gprob.gz
contains the genotype likelihoods for reference homozygote and heterozygote (two values per sample per marker).
Note that inputting the info file using --info
is optional. However, if this info file is NOT provided, the output OutPrefix.info
file will have some empty columns. Thus, if available, the generated info file should be provided along with the VCF file as input.
Converting Chromosome X Files
For a minimac3/4 output file containing the pseudo-autosomal region (PAR) on chromosome X, no extra parameter is necessary. For files containing the non-PAR region, please ensure the following:
- If your input VCF dosage file has males as diploids, then just add handle
--allDiploid
. This will NOT generate sex information in the output PLINK.fam
file. You would have to update it manually. - If your input VCF dosage file has males as haploids and also has GT information, the tool with automatically determine the sex of the samples and report them in the output
.fam
file. No extra parameters are required.- If GT tags are NOT available, you would need to supply the sex file as described above. Otherwise it will throw an error.
- NOTE: If your VCF file has males as haploids, do NOT use
--allDiploid
as the code would NOT throw any error, but the output results would be erroneous.
Command Line Options
The command options for DosageConvertor are explained below.
Option | Description |
---|---|
--vcfDose
|
mandatory parameter indicating the minimac3/4 VCF dosage file to be converted |
--info
|
the info file generated by minimac3/4 at the same time as the VCF dosage file (This parameter is optional, but if NO info file is provided, the output MaCH info file will have missing columns.) |
--prefix
|
sets the prefix for output files (default: |
--type
|
sets the output file format (available options: |
--tag
|
indicates the genotype information to import from the input VCF file:
|
--format
|
sets the format of the converted output file:
Each of these values correspond to the three different formats available for PLINK dosage files (details given here)
Details are given in Convert to MaCH Files |
--buffer
|
sets the number of markers to import at a time (MaCH format only) (default value |
--idDelimiter
|
indicates the delimiter character used to split VCF Sample ID into FID and IID for PLINK format (default: |
--allDiploid
|
indicates whether to assume all samples are diploid (necessary for chromosome X). If this option is active, the output PLINK |
--sexFile
|
indicates a file containing sample sex information, which requires two columns:
|
--TrimAlleles
|
indicates whether to trim alleles and variants IDs to 100 characters Since PLINK does not allow variant IDs longer than 16,000 characters, this option can be used if variant names are too long. |
Contact
In case of any queries and bugs please contact Sayantan Das.