Defining Charts

To visualize result and make analysis about you model, you will certainly have to use charts. You can define 3 types of charts in GAML: histograms, pie, and series. For each type, you will have to determine the data you want to highlight.

Index

• Define a chart
• Data definition
• Different types of charts

Define a chart

To define a chart, we have to use the chart statement. A chart has to be named (with the name facet), and the type has to be specified (with the type facet). The value of the type facet can be histogram, pie, series, scatter, xy. A chart has to be defined inside a display.

experiment my_experiment type: gui {
	output {
		display "my_display" {
			chart "my_chart" type:pie {
			}
		}
	}
}

After declaring your chart, you have to define the data you want to display in your chart.

Data definition

Data can be specified with:

• several data statements to specify each series
• one datalist statement to give a list of series. It can be useful if the number of series is unknown, variable or too high.

The data statement is used to specify which variable will be displayed. You have to give your data a name (that will be displayed in your chart), the value of the variable you want to follow (using the value facet). You can add come optional facets such as color to specify the color of your data.

global
{
	int numberA <- 2 update:numberA*2;
	int numberB <- 10000 update:numberB-1000;
}

experiment my_experiment type: gui {
	output {
		display "my_display" {
			chart "my_chart" type:pie {
				data "numberA" value:numberA color:#red;
				data "numberB" value:numberB color:#blue;
			}
		}
	}
}

(TODO_IMAGE)

The datalist statement is used several variables in one statement. Instead of giving simple values, datalist is used with lists.

datalist ["numberA","numberB"] value:[numberA,numberB] color:[#red,#blue];

[TODO] Datalist provides you some additional facets you can use. If you want to learn more about them, please read the documentation [URL]

Different types of chart

As we already said, you can display 3 types of graphs: the histograms, the pies and the series.

The histograms

[TODO]