A common method of visualising gene expression data is to display it as a heatmap (Figure 12). The heatmap may also be combined with clustering methods which group genes and/or samples together based on the similarity of their gene expression pattern. This can be useful for identifying genes that are commonly regulated, or biological signatures associated with a particular condition (e.g a disease or an environmental condition) (4).
Though, I am not a cellular biologist I often stay at Holiday Inn Express. A heatmap is map where a single type of finger, (drug) produces nothing, squirms, giggles, chuckles or laughs at a certain ribs, (genes).
Obviously you were not trained as a lawyer or you would know not to ask a question for which you do not already have an answer. Get ready to be pummeled.
Just because one has never seen a heat map before does not make use of heat map invalid....great visual aid for those who care to focus on data presented and explained in presentation.