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Example: Draw Bar Graph

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Explanation:

 

Bar chart

 

Example of a bar chart, with 'Country' as the discrete data set.

 

A bar chart or bar graph is a chart with rectangular bars with lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally.

Bar charts are used for plotting discrete (or 'discontinuous') data which has discrete values and is not continuous. Some examples of discontinuous data include 'shoe size' or 'eye color', for which you would use a bar chart. In contrast, some examples of continuous data would be 'height' or 'weight'. A bar chart is very useful if you are trying to record certain information whether it is continuous or not continuous data. Bar charts also look a lot like a histogram. They are often mistaken for each other.(Our solved example in mathguru.com uses this concept)

 

http://en.wikipedia.org/wiki/Bar_chart

 

The above explanation is copied from Wikipedia, the free encyclopedia and is remixed as allowed under the Creative Commons Attribution- ShareAlike 3.0 Unported License.