I've created SfChart as a spline type. I have two root
arrays which have double type elements; the first one is X array and the next
one is Y array. The element of each X array corresponds to an element of Y
array. Like at below. These arrays contain more than ten float or int values.
double  X = …
double  Y = …
I want to find an interpolation value belong to
spline with any method. It can be linear, non-linear, regression, cubic or
more complex; not matter.
I need the specific points between the X-Y data values which I used. I have
known only the Y value of these points, but I can’t find the corresponding X
For example, Y=2 then X=? or X=5 then Y=?
I want to find interpolated value or shown on spline as a mouse tooltip. Is
there any way to solve this?