HeatMapper:: powerful combined visualization of gene expression profile correlations, genotypes, phenotypes and sample characteristics

Background: Accurate interpretation of data obtained by unsupervised analysis of large scale expression profiling studies is currently frequently performed by visually combining sample-gene heatmaps and sample characteristics. This method is not optimal for comparing individual samples or groups of samples. Here, we describe an approach to visually integrate the results of unsupervised and supervised cluster analysis using a correlation plot and additional sample metadata. Results: We have developed a tool called the HeatMapper that provides such visualizations in a dynamic and flexible manner and is available from http://www.erasmusmc.nl/hematologie/heatmapper/. Conclusion: The HeatMapper allows an accessible and comprehensive visualization of the results of gene expression profiling and cluster analysis.