Recent Comments
Elastic Biaxial Bend… on Biaxial bending update 
Bill Harvey on Floating Point Precision … Floating Point Preci… on When does 35 not equal 35… 
dougaj4 on mpmath for Excel dougaj4 on mpmath for Excel 
Kapt Blasto on mpmath for Excel 
mktisis on 3D Frame with zero stiffness… dougaj4 on 3D Frame with zero stiffness… dougaj4 on 3D Frame with zero stiffness… mktisis on 3D Frame with zero stiffness… 
th3budd on Time in hours and minutes betw… dougaj4 on Moving Load Spreadsheet… 
Ario on Moving Load Spreadsheet… dougaj4 on About Newton Excel Bach 
David Graves on About Newton Excel Bach
Tag Archives: Polynomial
Python for VBA users – 5; Using built in numpy functions
Previous Python Post In previous posts in this series I have looked at translating VBA functions to solve quadratic and cubic equations, but the Python numpy library has a polyroots function that will solve polynomials of any degree, and will … Continue reading
Posted in Arrays, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA
Tagged complex numbers, Cubic, Excel, high order polynomials, Jenkins-Traub Method, Polynomial, Python, PyXLL, Quadratic, Quartic, UDF, VBA
5 Comments
Evaluating higher order polynomials …
… and a better solution for quadratics. Having written a better solver for high order polynomials, that raises a few other issues. The error in the roots found by the RPolyJT was checked by simply substituting each root as the … Continue reading
Posted in Excel, Maths, Newton, UDFs, VBA
Tagged complex numbers, Excel, Jenkins-Traub, Numerical methods, Polynomial, UDF, VBA
4 Comments
Solving higher order polynomials
The Quartic spreadsheet presented here previously (most recently here) uses algebraic techniques to provide an “exact” solution to polynomial equations of up to fouth order. For polynomials of higher order there is no general algebraic solution, and numerical methods are … Continue reading
Posted in Excel, Maths, Newton, UDFs, VBA
Tagged complex numbers, Excel, Jenkins-Traub, Numerical methods, Polynomial, UDF, VBA
12 Comments
Complex Numbers and Solving Quartic Polynomial Equations
It was recently pointed out to me that the User Defined Function (UDF) for solving quartic polynomial equations presented in this post returned an error for some input values. In tracking down the source of the error I decided that it … Continue reading
Posted in AlgLib, Excel, Maths, Newton, UDFs, VBA
Tagged complex numbers, Cubic, Excel, Polynomial, Quartic, UDF, VBA
2 Comments
Approximate Solutions of Polynomial Equations
Following on from the previous post, this post presents a number of methods of solving polynomial equations using approximate iterative methods in Excel. Similar methods can be used to find solutions to any other equation that can be evaluated numerically. … Continue reading
Posted in Excel, Maths, Newton, UDFs, VBA
Tagged Cubic, Excel, Newton-Raphson Method, Polynomial, Quartic, UDA, VBA
3 Comments
