Session 13-14 Group F Bubble graph

Bubble Graph

Bubble charts represent 3 dimensional data. Data is passed in to a bubble chart as a series of [x, y, radius, <label or object>]. The optional fourth element of the data point can either be either a label string or an object having 'label' and/or 'colour' properties to assign to the bubble.

By default, all bubbles are scaled according to the size of the plot area. The radius value in the data point will be adjusted to fit the bubbles in the chart. Bubble charts allow us to visualize three different measures at the same time. And not only that: they are easy to read and they allow us to make critical associations between these measures. This type of chart also allows combining three measures with different type’s scales: percentages and absolute values.

Possible Uses

Bubble graphs can be used for:

·         Data with three variables

·         Financial data

Examples

 

This bubble chart displays a fictitious project portfolio. Individual project bubbles are distinguished by their colors and patterns. The chart is divided into equal quadrants to identify relative project attractiveness. Larger bubbles in the upper left quadrant represent the most attractive projects while smaller bubbles in the lower right quadrant represent the least attractive projects. Bubbles with an "X" indicate that the bubble size represents a negative value for NPV.

THE LIMITATIONS:

·         Bubble charts might not be an ideal solution for large data sets as there would be too many overlaps.

 

 

By

Amita Kachhap

14068

HR