Analysis of three-dimensional grids: Interpolation of data in prismatic array and the estimation of a missing datum

Nine data in cubical array can be interpolated by means of operational equations that use sines and cosines or exponential forms. The interpolating equations permit curvature estimations by means of quadratic-term coefficients. If the data reflect laws that are nearly linear, quadratic, cubic, exponential, or trigonometric, surrogate numbers for a missing datum can be estimated. If experimental work is costly, the surrogates may sufficiently accurate to interest experimentalists.