A bubble chart is some degree of difference of a scatter plot and the markers in it are being substituted with bubbles and this is possible only we have a set of data points that have three values contained in each data item. It shows the relationship that exists between the minimum of three variables. Two of them get represented by the plot axes i.e., x-axis and y-axis, while the third one by the bubble size and each bubble is a representation of an observation.
Bubble plot is used with a lot of value, say hundreds of them, or also used if the values are somewhat different by numerous structures of magnitude. Colors are being used to represent an additional measure and the bubbles could be subjected to animation in order to show data changes over a period of time.
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| Bubble Chart |
the bubble plot is also very useful in project management in comparing the rate of risk and success involved in executing a project and where there are three values as net present values, then the probability of success and the total sum represent the bubble size.
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