Figure 2
From: SolexaQA: At-a-glance quality assessment of Illumina second-generation sequencing data
Distribution of mean quality (probability of error, y -axis) at each nucleotide position ( x -axis) for each tile individually (dotted black lines) and the entire dataset combined (red circles). Note the considerable variance in data quality between tiles. The defects evident in this dataset (see text for details) are atypical of Illumina sequencing; this dataset was chosen specifically to illustrate the capabilities of SolexaQA.