I can still see an advantage in stacked charts when a key piece of information is a sum of components. In the example on site, the data seems to be a proportion, and so there's really no purpose to stacking the lines because the sum is constant.
One could still depict totals as separate lines on a stacked chart, but for subset sums, a stacked area chart helps show how the sum is composed.
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I can still see an advantage in stacked charts when a key piece of information is a sum of components. In the example on site, the data seems to be a proportion, and so there's really no purpose to stacking the lines because the sum is constant.
One could still depict totals as separate lines on a stacked chart, but for subset sums, a stacked area chart helps show how the sum is composed.