Visualizing histogram data over time with the heatmap
Armed with the tools to produce histograms and corresponding bar chart visualizations for our earthquake data, we now turn to an additional dimension: time. What if you could see how histogram data changes over time? Enter the heatmap, a visualization capable of mapping histogram bins with the x axis representing time, the y axis representing the bin, and the bin count by color.
In order to leverage the heatmap, we only need to make a small change to our existing panel, so let’s make a copy first. To duplicate a panel, click on the title of the panel on the dashboard and select More... | Duplicate. Now, open the new panel for editing.
Disable the Histogram and Convert field type transformation functions. They are not relevant for this visualization.
When you switch the panel over to use the Heatmap visualization, you may either see something that looks like a bunch of colored rectangles or you may get an error. The...
