Discussion


Note: Images may be inserted into your messages by uploading a file attachment (see "Manage Attachments"). Even though it doesn't appear when previewed, the image will appear at the end of your message once it is posted.
Register Latest Topics
 
 
 


Reply
  Author   Comment  
Matt

Registered:
Posts: 7
Reply with quote  #1 

The Time on the Horizon article by Stephen Few details the thinking behind design of the horizon graph.

http://www.perceptualedge.com/articles/visual_business_intelligence/time_on_the_horizon.pdf

The design details the simple scenario of a single value threshold. Values above the threshold are "good", values below the threshold are "bad".

What about cases where the threshold is not so simple?

For instance, take the example of the daily temperature. Let's suppose any temperature between 50 F and 77 F is "good", while a temperature below 50 (too cold) are "bad", and a value above 77 (too hot) is "bad". Instead of a single value determining high or low, we now have to contend with a range. Is there a recommended way to deal with this scenario?

sfew

Moderator
Registered:
Posts: 837
Reply with quote  #2 
Hi Matt,

I can easily envision how a horizon graph could be designed to accomodate the scenario that you proposed with a central band representing the acceptable range that doesn't collapse into multiple bands. Unfortunately, this arrangement would not be as vertically space efficient as horizon graphs usually are. Also, I doubt that any software currently supports this.

__________________
Stephen Few
Matt

Registered:
Posts: 7
Reply with quote  #3 

Hi Stephen,

Do you envision the central band occupying the full height of the graph at all times? Using the previous temperature example, any value between 50 and 77 would look the same on the graph?

And then with respect to color encoding, do you envision the central band having only one color, or perhaps - at the risk of making the graph too busy - the central band itself could have three levels of intensity as it approaches or goes away from the middle of the band?

sfew

Moderator
Registered:
Posts: 837
Reply with quote  #4 
Matt,

Without actually trying it, I can't say for sure how this should be designed, but I'm envisioning a central band that would remain static in height and would show a line going up and down to reperesent the values in the 50 to 77 degree range. Only the ranges of temperatures that fall below 50 degrees or above 77 degrees would be color coded with bands that are collapsed. This might not work for higher than normal temperatures, however, which don't range as far as lower than normal temperatures.

Another alternative would be to set the baseline at 50 degrees and then use the standard banding technique, which could be easily done.

__________________
Stephen Few
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.