Figure 2From: UrQt: an efficient software for the Unsupervised Quality trimming of NGS dataProbability-phred functions. p(q,t) according to the choice of t. The white, dark grey, light grey and black dots represent respectively the position of p 1,p 2,p 3 and p 4 for the corresponding probability-phred functions. Before p 1 we have the \(1-2^{\frac {-q}{t}}\) part of the function (B) and after p 1 the B(q ⋆,p 1,p 2,p 3,p 4) part of the function (B).Back to article page