title: Extract sample data from VCF files
body: <p>I have a large Variant Call format (VCF) file (> 4GB) which has data for several samples.</p>
  
  <p>I have browsed Google, Stackoverflow as well as tried the VariantAnnotation package in R to somehow extract data only for a particular sample, but have not found any information on how to do that in R.</p>
  
  <p>Did anybody try anything like that, or maybe knows of another package that would enable this?</p>