Tag Archives: Quadratic

Solving Quadratic, Cubic, Quartic and higher order equations; examples

Posted on January 14, 2014 by

A previous post presented a spreadsheet with functions for solving cubic and quartic equations, and this has been extended with another function solving higher order polynomials.  The functions are actually very easy to use, but the documentation in the spreadsheets is quite brief, … Continue reading →

Posted in Arrays, Excel, Link to Python, Maths, Newton, UDFs, VBA | Tagged , , , , , , , , , | 11 Comments

Python for VBA users – 5; Using built in numpy functions

Posted on October 13, 2013 by

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 , , , , , , , , , , , | 5 Comments

Daily Download 19: Solving polynomials

Posted on October 6, 2012 by

Today’s download provides analytic solutions to polynomial equations up to fourth order (that is quadratic, cubic and quartic equations) and an iterative method to solve equations of higher order.  All these functions are found in the download file: http://interactiveds.com.au/software/Polynomial.zip The … Continue reading →

Posted in Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , , , | 1 Comment

Solving cubic and quartic equations with Excel

Posted on August 4, 2010 by

Although in earlier posts (such as this one) I have referred to some User Defined Functions (UDFs)  for solving cubic and quartic equations, I just realised recently that I haven’t actually talked about them here, and since they are in … Continue reading →

Posted in Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , | 24 Comments

Linking Excel to Fortran – 2

Posted on December 4, 2008 by

In this post the procedures described for C++ here will be replicated for Fortran: The spreadsheet, fortran source code, and compiled dll described in this code may be downloaded from Cubic.zip As always, it is better to use the downloaded code, … Continue reading →

Posted in Excel, Fortran, Link to dll, Maths, UDFs, Uncategorized, VBA | Tagged , , , , , | 23 Comments

Reinforced Concrete Section Analysis – 3

Posted on May 30, 2008 by

Previous post -1 Previous post -2 The theory presented in the previous 2 posts in this series has been incorporated into an Excel UDF, allowing concrete and reinforcement stresses and strains to be evaluated quickly and easily for reinforced and … Continue reading →

Posted in Beam Bending, Excel, Newton, UDFs | Tagged , , , , , , , , | 8 Comments

Hello World in a UDF

Posted on February 21, 2008 by

An Excel User Defined Function (UDF) is probably the single most useful feature that remains unused by the majority of users. This post will provide a brief introduction with the obligatory “Hellow World” program, followed by something only a little … Continue reading →

Posted in Excel, UDFs | Tagged , | 4 Comments