Discrete spline interpolation

Discrete spline interpolation is a method used to estimate missing data points from a set of known data points. It works by connecting the known data points with smooth curves called splines, so that you can use those curves to predict what values the missing parts could be. Imagine you had a graph of a strawberry, and somebody cut a piece out. Spline interpolation would let you fill in the missing part by drawing a curved line that connects the other known points on the graph.