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The JavaFx platform includes components that support creation of several types of charts for visualizing data.  In this series of articles I'll take a look at how the charting components can be used to display data that changes over time. 

For example, the bar chart below is displaying the Planetary K Index for the last four days. The Planetary K index shows the disturbance of the geomagnetic field measured by an instrument called a magnetometer. The K-index scale has a range from 0 to 9 and is directly related to the maximum amount of fluctuation (relative to a quiet day) of the geomagnetic field over a three-hour interval. The estimated Kp index is computed by the United States Airforce Weather Agency and distributed to the public by the NOAA Space Weather Prediction Center in Boulder, CO.