getValueAtViewPort(id, vpCoor [, isLogScale ])

Converts a view port coordinate to a value of the specified data scale.

Please refer to WebChartViewer.setFullRange on how to define a data scale.

Argument	Default	Description
id	(Mandatory)	The name of the data scale.
vpCoor	(Mandatory)	The view port coordinate.
isLogScale	false (zero)	true (non-zero) if the conversion is based on a logarithmic scale. false (zero) if the conversion is based on a non-logarithmic scale.

The value of the specified data scale at the view port coordinate.