Charts

Charts

An M2Assistant chart is a sophisticated charting tool which can be used to create 2D or 3D charts from any EMME/2 network element or matrix. For example, you can create a chart to compare the assignment results from two or more scenarios, or create a matrix histogram chart from the contents of one or more matrices.

Chart series types includes bar, line, area, point and pie charts. You can define an unlimited number of series. You may also mix series types, such as bar and line series, on one chart.

To create a chart, first select the network element to be charted. Centroids, nodes, links, lines, segments and full matrices can be charted. Then, enter an expression for the X value and the Y value. You may also define a filter to limit the network elements that will be charted. Once you have defined the X and Y value expressions, press F5 or click the Refresh button to recalculate and display the chart.

If the "X Value" expression returns a string, or you wish to display the "X Value" results as strings, you should set the "X axis values as labels" checkbox.

You can also display the chart as a histogram. A histogram chart sums the result of the "Y Value" expression for each "X Value" expression. Normally, the "Y Value" expression would be "[Count] 1" for a histogram. To display a histogram chart, set the "Y axis values as histogram" checkbox.

For a histogram chart, the following settings must also be specified.

Minimum: Enter the minimum value to be included in the calculations for the histogram. Only values greater than or equal to this value will be included in the histogram. Click the Minimum button to reset this value to the default value (the lowest result of the X Value expression).

Maximum: Enter the maximum value to be included in the calculations for the histogram. Only values less than or equal to this value will be included in the histogram. Click the Maximum button to reset this value to the default value (the highest result of the X Value expression).

Interval: Specify the interval to be used for calculating the histogram. The interval is the spacing between values on the X axis.

A special series type, called function series, can also be defined which calculate a series of points based on the values in another series.