Area chart is a combination of the features of Line charts and Stacked Bar charts. This is a chart type where each area is given a solid colour or pattern to emphasize the relationships between the pieces of charted information. It shows the relative contributions over time that each data series makes to the whole picture. An Area Java chart from ElegantJ Charts Library is the best choice to show relationships as a part of a whole over a period of time. For example, an Area chart can aptly show change in the relative amounts of the principal and interest over the time of a mortgage.
Area charts can be used to:
Display changes in cumulative value or percentage over time
Compare groups on outcome measurements
Display group trends
Components and functions of Area Charts:
Area Chart is a type of presentation graphic that emphasizes a change in values by filling in the portion of the chart beneath the line connecting various data points.
The components of Area Chart often look like a Line chart coloured in the areas underneath each line.
Each of these area segments is stacked on top of each other, like in a Stacked Bar chart.
The aggregated size of the area at each category reflects the cumulative value of all data items in that category.
The first series will always be the top area segment.
Each data series in the Area chart component corresponds to a coloured segment of the total area.
Area charts are useful when you want to show group trends in addition to comparing trends between individual series of data.
For the Area chart, the following statistics can be calculated:
Sum: The sum value in the series.
Count: The count value in the series.
Valid Count: The valid count value in the series.
Average: The average value in the series.
Valid Average: The valid average value in the series.