Edward Tufte was already mentioned and his books contains some really good examples http://www.amazon.co.uk/Visual-Display-Quantitative-Information/dp/09613921

Edward Tufte was already mentioned and his books contains some really good examples http://www.amazon.co.uk/Visual-Display-Quantitative-Information/dp/0961392142 http://www.amazon.co.uk/Visual-Display-Quantitative-Informat... I'd say, yes numerical is often just as good, but not always. Also, in my opinion, whether information is displayed numerically or visually, the key is to be as minimalistic as possible.