COMPONENTS

Column Chart

Ideal for displaying values by category or change over time of a single dataset. The length of the column is proportional to the value it represents.

chart-type-column

DO

  • The width of the columns should be wider than the space between the columns.
  • Always label your axes and include the units for the y-axis.
  • On the y-axis choose increments that are easy to follow.
  • Display negative values below the zero baseline.
  • Always include a zero baseline on the y-axis. A column graph that doesn't include a zero baseline is misleading.
  • The zero baseline should be thicker than the rest of the grid lines.
  • You can use a lighter shade of colors for projections.

DON'T

  • Don't truncate the columns or a single column. Truncation misrepresents the actual value of each column.
  • Don't use shadows on the columns. They can be distracting and misleading.
  • Don't use 3-D columns. They are misleading because it is hard for the viewer to determine the top of the bar.