DXperience v2008 vol 3: Charts with logarithmic scales

24 October 2008

One of the new features in XtraCharts for v2008 vol 3 is the addition of a logarithmic scale.

Here's a chart showing the population of various regions of the Earth as it would have been rendered prior to v2008 vol 3 of DXperience:


Notice how the line showing the population of Asia is higher and increasing much faster than the other lines. Since population growth is essentially an power or exponential function, you'd get more information from plotting the population numbers logarithmically instead:


(I'm using base 10 logs here.) Notice how the Oceania line now lifts up away from the X-axis so we can see it better, and the set of lines are now more evenly spread out. Although you could see the rate of population growth is increasing in the Americas in the original chart, it's easier on this chart to see that it's not an exponential growth since the line is leveling off.

If you want to see more about this feature or about XtraCharts in general, please don't hesitate to come up to me in booth 501 at PDC and ask. I'll also be recording videos about the new features later on.

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