We will very soon post about Chart Tamer on blog.xlcubed.com.

Andreas

Can you provide more information about the new product, sounds very interesting.

Regards,

Jose

but presentations are a whole different matter.

on a slide, you want to convey one message. your graph must NOT carry any information that can be interpreted differently than the point you are trying to make. the corollary is that in virtually all cases, you should display as little data points as possible: 1 if possible, 2 but no more than 3. If you need more than 3 data points, use handouts.

now the problem with bar charts is that they remain legible even with many data points, so typically you would see slides with 5, 10 or more bars, which make the slide a less effective presentation means. And the author thinks they’ve done nothing wrong because they used a chart like the textbook says and not a pie chart which is always wrong.
Then, you see what Seth is meaning.

I fully agree that bar charts are not good for time series. who wouldn’t. but trying to cram too much info on one slide which is what bar charts encourage you to do is not the right answer.