The most important parameter of a histogram is the bin width because it controls the tradeoff between presenting a picture with too much detail ("undersmoothing") or too little detail ("oversmoothing" ...

Whether you've got a DSLR or you've turned your point-and-shoot into a super camera, those fancy features are useless if you don't understand them. Want to capture a perfectly exposed picture?

Graphs are a useful way to show numerical data. There are a variety of graphs that can help highlight patterns and be used to reach conclusions. Choosing the right graph is very important. Bar charts ...