Patterns of gene expression by K-means cluster analysis in the developing gametophyte of P. patens. Differentially expressed genes across all four time-points were grouped into six clusters using the K-means clustering algorithm. The y-axis gives the tag count (on a log scale) of differentially expressed genes. Each line represents a different gene.
Xiao et al. BMC Plant Biology 2011 11:177 doi:10.1186/1471-2229-11-177