This example subgroups by department the 3D vertical bar chart of total sales for each site that is shown in Specifying the Sum Statistic in Bar Charts. In addition to subdividing the bars to show the ...

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter. If you want to sow division among chartmakers, ask them if pie charts are a good idea. If you want to raise a ...

For creating output with drill-down for the Web, the example shows how to explicitly name the HTML files and open and close them throughout the program specify names and destination for the GIF files ...

A bar chart is a diagram that uses rows of horizontal or vertical bars to show information. The title tells you what the bar chart is about. The vertical and horizontal lines are called axes. The ...

Smart energy meters are great for helping people conceptualise their use of energy in real-time, rather than being faced with a nebulous bill every quarter, but what if rows of numbers leave you ...

Forbes contributors publish independent expert analyses and insights. I help people communicate data clearly with graphs. In my last post I criticized a figure showing Facebook valuations over time.

A bar chart is a diagram that uses rows of horizontal or vertical bars to show information. The title tells you what the bar chart is about. The vertical and horizontal lines are called axes. The ...