Bar graphs plots:
- associated with quantities (number of case, sum of)
whereas an histograms plots:
- associated with its bins
- quantities as bar lengths
- and categories as bars or groups of bars.
The bars can be in a horizontal or vertical direction.
- competing product sales, same product sales over different time periods,
- same product sales over different markets.
- Stacked Vertical
- Stacked Horizontal
- Pattern Fill