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Category Archives: UDFs
The Inverse Quadratic Method 3 – Brent’s Method
The previous post in this series presented iterative methods to solve polynomial equations using direct or inverse quadratic interpolation. These methods have two disadvantages: In some circumstances the function may converge very slowly, or not at all. The name of … Continue reading
Posted in Excel, Maths, UDFs, VBA
Tagged Excel, inverse quadratic, iterative solution, Maths, UDF, VBA
12 Comments
Calling a function as a variable
The functions described in recent posts provide iterative solutions to polynomial equations, but the same method can be used for any equations that can be evaluated numerically and have a single variable. The question then is, how can we call a … Continue reading
Posted in Arrays, Excel, Maths, UDFs, VBA
Tagged application.run, calling a function, equation solver, Excel, iteration, UDF, VBA
6 Comments
The Inverse Quadratic Method – 2
Firstly a clarification from the previous post in this series. The method presented in that post was a direct application of quadratic interpolation, rather than the inverse quadratic method, as implied by the post title. The inverse quadratic method will be … Continue reading
Posted in Excel, Maths, UDFs, VBA
Tagged Excel, quadratic interpolation, Solve polynomial, UDF, VBA
3 Comments
Function roots with the Inverse Quadratic Method
An earlier post presented various methods for finding the roots of polynomial functions based on the use of linear interpolation. It is sometimes advantageous to use a quadratic interpolation function, and methods using this approach will be presented in this and following … Continue reading
Posted in Excel, Maths, UDFs, VBA
Tagged Excel, quadratic interpolation, Solve polynomial, UDF, VBA
5 Comments
Tension Stiffening
Tension Stiffening in reinforced concrete is the increase in stiffness of a cracked member due to the development of tensile stresses in the concrete between the cracks. The main application of tension stiffening theory in design applications is in the … Continue reading
Posted in Beam Bending, Concrete, Excel, Newton, UDFs, VBA
Tagged Excel, moment curvature, Reinforced Concrete, tension stiffening, UDF, VBA
3 Comments
