We have expanded our custom Excel interpolation functions to interpolate both 2D and 3D datasets, i.e. to interpolate over a curve or over a surface.
Cubic and Bicubic Interpolation Excel Examples with Source Code
The Excel Solver is a powerful tool for solving complicated problems. But what if you want something smaller and more compact like… an Excel spreadsheet function? Minimize() and MinimizeNonnegative() combine the power of a nonlinear optimizer with the convenience of a spreadsheet function. Unlike the Excel Solver, these functions automatically respond to changes in the spreadsheet and recalculate like any other formula. As an added bonus, Minimize() and MinimizeNonnegative() can optimize some things that the Excel Solver cannot.
The Excel Solver is a powerful tool for solving complicated problems. But what if you want something smaller and more compact like… an Excel spreadsheet function? Minimize() combines the power of a nonlinear optimizer with the convenience of a spreadsheet function. Unlike the Excel Solver or Goal Seek, it responds to changes in the values of its arguments and recalculates automatically like any other formula in the spreadsheet. As an added bonus, Minimize() can optimize some things that the Excel Solver cannot.
Math for Mere Mortals 