LinearScale

Scale

The LinearScale object contains a linear scale, i.e., a scale that linearly maps numerical values to physical attributes. To create a LinearScale object, call the LinearScale constructor.

var qscale = new LinearScale('Last Year','This Year');

You can pass the names of the fields (e.g., ‘Last Year’, ‘This Year’) for which the scale should be generated to the constructor, or specify these later using the inherited Scale.setFields(field) property.

The following special methods are provided:

Example

Chart Component Script

dataset = [["State","Quantity"], ["NJ",200], ["NY",300]]; (1)
graph = new EGraph();
var qscale = new LinearScale(); (2)
qscale.setFields(["Quantity"]);
var elem = new IntervalElement("State", "Quantity");
graph.setScale("Quantity", qscale); (3)
graph.addElement(elem);

1	See dataset to use a data block instead of an array literal.
2	Create the `LinearScale` object.
3	Use EGraph.setScale(field, scale) to add the Scale to the Chart.

Script that modifies the graph or dataset properties should be placed on the Chart component itself. See Add Component Script for more information. This script has access to the Chart data and Chart API methods. Scripted Charts are not good candidates for user-modification, so you should deselect ‘Enable Ad Hoc Editing’ in the Chart Properties dialog box.