$graph->get_hotspot($dataset, $point) 
Experimental: Return a coordinate specification for a point in a dataset. Returns a list. If the point is not specified, returns a list of array references for all points in the dataset. If the dataset is also not specified, returns a list of array references for each data set. See "HOTSPOTS".

$graph->get_feature_coordinates($feature_name) 
Experimental: Return a coordinate specification for a certain feature in the chart. Currently, features that are defined are axes, the coordinates of the rectangle within the axes; x_label, y1_label and y2_label, the labels printed along the axes, with y_label provided as an alias for y1_label; and title which is the title text box. See "HOTSPOTS".