Heat map with numeric values Part of PowerCharts XT
A heat map chart is a specialized chart that uses colors to represent data values in a table. It is mostly used to plot large and complex data. The chart is visualized like a table with a finite number of rows and columns. Cells within the table are rendered in different colors depending upon the range in which the data value they represent belongs to. An icon legend or a gradient legend, depending on the use case, is rendered at the bottom of the chart. This chart can be used to plot data like employee attendance, performance ratings, election results, and so on.
- Appropriate numerical ranges that enable a fairly even distribution of data between them.
- Use appropriate colors for the data ranges. Some colors stand out more than the others, giving unnecessary weight to that data. Instead, use a single color with varying shade or a spectrum between two analogous colors to show intensity.