Analysis of four-point grids: the diamond configuration

摘要

Equations for the four-point grid can be derived from data taken in the diamond array. The equations are obtained from analogous equations for the rectangle or by appeal to the shifting operator, exp(x)F(x)=F(x+h). Curvature on the grid is estimated by interaction and quadratic coefficients. These coefficients compare favorably to the same coefficients as determined by Taylor expansion of the functions generating the data.