Numerical Integration Functions in Excel

Integrate formulas and functions

Use QUADF to compute a proper or improper integral of any formula or VBA user defined function using highly accurate adaptive algorithms.

Integrate discrete data points sets

Use QUADXY to integrate a discrete set of (x,y) data points using linear or cubic splines.

Compute multiple integrals

Nest QUADF to compute multiple integrals of any order with individualized control of each nested integral such as algorithm selection.

Video Illustrations

How to compute numerical integrals with QUADF()

Description

This video demonstrates how to use the integration functions QUADF for computing accurate integrals in both Excel and Google Sheets. Several examples are solved including fixed limits, infinite limits and singular points. The video also demonstrates how to nest QUADF to compute multiple integrals of any order.

How to compute an (x,y) graph integral with QUADXY()

Description

This video demonstrates how to use the function QUADXY to compute accurate integral of a graph generated from discrete (x,y) data set points in both Excel and Google Sheets by the aid of splines.
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