I have a graph which can render both surf height or swell height up the Y-AXIS. The users have the ability to toggle the display value, but there must be a default value, which ever way I default the information I get a bunch of emails saying that people preferred the other route.
My solution is present the user with an option before the graph is rendered, covering the graph canvas, Selected Graph Type: Surf Height or Swell Height, cookie the selection and then always default the graph to this. One it configuration.
Is this an acceptable solution or should I stick to my guns and default the graph to the most common data set and allow users to change the legend using the toggle.
You can see the graph here.