hi,
i want to retreive the y value for the coreesponding x-value.
i used
public double getYValue(int series, int item),
a method of XYDataset.
when i used that method, Nullpointer exception is thrown.
i cant intialise XYDataset,because it is an interface.
my x-axis is date and i want the return type of the function as double.
is there any method to get the y-value for the corresponding x-value.