![]() ![]() The result of this subroutine is a coefficient table which is passed into the SplineInterpolation2D subroutine. The bilinear spline is constructed by using the BuildBilinearSpline subroutine. Besides, this method is relatively inaccurate. The main disadvantage is the discontinuity of a derivative in the grid square boundaries. This interpolation method is simple and fast. It consists of bilinear functions which are defined in each grid square as having prescribed values. The bilinear spline is a two-dimensional generalization of a one-dimensional linear spline and has the same pros and cons. The bilinear function is bivariate function f(t,u) which is linear in t when u is fixed and vice versa. These algorithms are: bilinear spline interpolation and bicubic spline interpolation. It is this grid that is used by the two most important interpolation algorithms. The main peculiarity of two-dimensional interpolation is that most two-dimensional algorithms are applicable only with rectilinear grids oriented to axes. See new articles on bilinear and bicubic splines This article is outdated due to the last updates in the ALGLIB package. ALGLIB User Guide - Interpolation and fitting - OUTDATED ARTICLE: bilinear and bicubic spline interpolationīilinear and bicubic spline interpolation ![]()
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