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= Imputation =
 
= Imputation =
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There are two choices for imputation step: imputing from best-guess haplotypes and imputing from a sample of alternate haplotype configurations.
      
Below is a lightly modified version of script “prototype_imputation_job_best_guess_haps.sh” that accomplishes imputation. The original script is included in the package of [http://mathgen.stats.ox.ac.uk/impute/prephasing_and_imputation_with_impute2.tgz IMPUTE2 examples]. This version has been modified to reference the most recent set of 1000 Genome Haplotypes (currently, the Phase I integrated haplotypes [http://mathgen.stats.ox.ac.uk/impute/data_download_1000G_phase1_integrated.html available from the IMPUTE2 website]) and to include the <code>-seed</code> parameter, which ensures results can be reproduced by running the script again.
 
Below is a lightly modified version of script “prototype_imputation_job_best_guess_haps.sh” that accomplishes imputation. The original script is included in the package of [http://mathgen.stats.ox.ac.uk/impute/prephasing_and_imputation_with_impute2.tgz IMPUTE2 examples]. This version has been modified to reference the most recent set of 1000 Genome Haplotypes (currently, the Phase I integrated haplotypes [http://mathgen.stats.ox.ac.uk/impute/data_download_1000G_phase1_integrated.html available from the IMPUTE2 website]) and to include the <code>-seed</code> parameter, which ensures results can be reproduced by running the script again.
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Filtering Option -filt_rules_l is used in this example to remove reference SNPs with MAF=0 in European reference panel (for example, a European cohort).
 
Filtering Option -filt_rules_l is used in this example to remove reference SNPs with MAF=0 in European reference panel (for example, a European cohort).
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The syntax for starting each of these jobs would be similar for the phasing jobs and, again, you should use a suitable grid or cluster engine to submit multiple jobs in parallel.  
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The syntax for starting each of these jobs would be similar for the phasing jobs and, again, you should use a suitable grid or cluster engine to submit multiple jobs in parallel.
 
      
= X-Chromosome Imputation =
 
= X-Chromosome Imputation =
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