Figure 3
From: Evaluating Variant Calling Tools for Non-Matched Next-Generation Sequencing Data

Relation between sensitivity and positive predictive value (PPV) in case of GATK, Platypus, VarScan, LoFreq, FreeBayes, SNVer, SAMtools and VarDict comparing (a) the real- and simulated datasets (real data: framed symbols) and (b) varying coverage in the simulated datasets (the darker the symbol, the higher the coverage).