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- Time in hours and minutes between two dates
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- Solving Quadratic, Cubic, Quartic and higher order equations; examples
- Using Linest for non-linear curve fitting, examples, hints and warnings
- Weighted Least Squares Regression, using Excel, VBA, Alglib and Python
- Using LINEST for non-linear curve fitting
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Tag Archives: Quadratic
Solving Quadratic, Cubic, Quartic and higher order equations; examples
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 Cubic, Excel, Higher order polynomials, Jenkins-Traub, Python, Quadratic, Quartic, solving polynomials, UDF, VBA
13 Comments
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
Daily Download 19: Solving polynomials
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 Cubic, Evaluate polynomial, Excel, Jenkins-Traub, Quadratic, Quartic, Solve polynomial, UDF, VBA
1 Comment
Solving cubic and quartic equations with Excel
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
Linking Excel to Fortran – 2
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 Cubic, Excel, Fortran, Quadratic, UDF, VBA
23 Comments