b = del2(s) : computes the Discrete Laplacian of iData object @iData/del2 function to compute the Discrete Laplacian of data sets. input: s: object or array (iData) output: b: object or array (iData) ex: b=del2(a); Version: Nov. 27, 2018 See also iData, iData/gradient, del2, gradient, iData/jacobian