Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Structure of the PPP. PPP functions are grouped into four categories: 1) the Core PPP functions that operate on VCF files; 2) the optional BED and STAT functions which may be used to sample, filter, and/or edit BED or STAT files; 3) the conversion functions which are required to convert from VCF to analysis-specific file formats; and 4) the analysis functions which are used to automate their respective analyses.
