Line Graphs

Line graphs can be used for:

Determining trends or cyclical variations
Money distribution over time
Production over time
Price variation over time
Environmental changes over time
Material characteristics by temperature
Clinical response by concentration

The Line graphs is another commonly used graph type. Line graphs are useful when you want to show data trends. In a Line graph, data items are represented by points or symbols. Data items in the same series are connected to each other by a line so that you can see a trend in your data over a number of data categories. The categories of data become the scale indexes along the x-axis, while each series of data is represented by an individual line.

Note: The X-Y Line subtype of the X-Y Plot graph type looks very similar to a Line graph. However, it uses data differently. If your data is in X-Y pair data points you will want to use X-Y Line subtype of the X-Y Plot graph. Otherwise, you will probably want to use the standard Line graph described here.

Example 13.7 illustrates the use a Line graph.

Line graphs are in the Standard Data Class (see Chapter 12 for details). To create a Line graph with PopChart XML, create a Graph element and set its Type attribute to Line, as shown in the example below.