Heatmap
3 variants · dashboard · for app, analytics pages
matrix
a labelled grid with each value written in its shaded cell: cohorts and retention, hours by weekday, when the exact numbers are read
dots
a quiet field of dots sized and shaded by value, for long periods read at a glance: occupancy, activity per day or per slot
ranked-rows
the rows sorted by their total, each one a thin strip of its cells, when which row leads matters more than the columns