Friday, October 2, 2009

Simple Bar Chart
A simple bar chart is used to represents data involving only one variable classified on spatial, quantitative or temporal basis. In simple bar chart, we make bars of equal width but variable length, i.e. the magnitude of a quantity is represented by the height or length of the bars. Following steps are undertaken in drawing a simple bar diagram:
Draw two perpendicular lines one horizontally and the other vertically at an appropriate place of the paper.
Take the basis of classification along horizontal line (X-axis) and the observed variable along vertical line (Y-axis) or vice versa.
Marks signs of equal breath for each class and leave equal or not less than half breath in between two classes.
Finally marks the values of the given variable to prepare required bars.
Example: Draw simple bar diagram to represent the profits of a bank for 5 years.
Profit (million $)
Simple bar chart showing the profit of a bank for 5 years.