### Categories

### RSS Feed

### Search NewtonExcelBach

### Archives

### Top Posts

- Time in hours and minutes between two dates
- Using Goal Seek on Multiple Cells
- Commenting a block of code in VBA
- Weighted Least Squares Regression, using Excel, VBA, Alglib and Python
- Solving Quadratic, Cubic, Quartic and higher order equations; examples
- Using LINEST for non-linear curve fitting
- Downloads
- P-Y Curve function
- Cubic Splines
- Fitting high order polynomials

### Recent Comments

Graeme Dennes on Numerical Integration With Tan… dougaj4 on Numerical Integration With Tan… dougaj4 on Numerical Integration With Tan… John Maddock on Numerical Integration With Tan… Making Finite Elemen… on Making Finite Element Analysis… Chartree on ULS Design Functions 2.13 dougaj4 on ULS Design Functions 2.13 Chartree L. on ULS Design Functions 2.13 dougaj4 on ULS Design Functions 2.13 Chatree L. on ULS Design Functions 2.13 ConbeamU update | Ne… on ConbeamU 4.10 vgmendes on LinEstGap with non-linear… dougaj4 on LinEstGap with non-linear… vgmendes on LinEstGap with non-linear… Stan on ALGLIB linear and polynomial f…

# Tag Archives: Newton’s Method

## Solving non-linear equations with two or more unknowns – 5

This will be the last of the series on solving non-linear equations (for now). Up until now all the examples have had two unknown values, and two target values. This can be extended by making three changes to the code: … Continue reading

Posted in Beam Bending, Concrete, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA
Tagged Excel, ExcelPython, moment curvature, Newton's Method, Python, SciPy, SciPy optimize function, solving non-linear equations, tension stiffening, two or more objectives, two or more unknowns, UDF, VBA
3 Comments

## Solving non-linear equations with two or more unknowns – 4

As promised in the previous post, the spreadsheet including the new functions to calculate reinforced (or prestressed) concrete moment-curvature with a revised concrete tension stress-block is now available for download from: RC design functions7.zip The spreadsheet includes full open source … Continue reading

Posted in Beam Bending, Concrete, Excel, Maths, Newton, UDFs, VBA
Tagged Excel, moment curvature, Newton's Method, solving non-linear equations, tension stiffening, two or more objectives, two or more unknowns, UDF, VBA
Leave a comment

## Solving non-linear equations with two or more unknowns – 3

For the next stage of the non-linear solver saga I am looking at the same problem as in the previous post (finding the curvature or a reinforced concrete section under specified bending moment and axial load), but with more realistic … Continue reading

Posted in Beam Bending, Excel, Maths, Newton, UDFs, VBA
Tagged Excel, moment curvature, Newton's Method, solving non-linear equations, tension stiffening, two or more unknowns, UDF, VBA
1 Comment

## Solving non-linear equations with two or more unknowns – 2

The previous post presented a simple but slow procedure for solving non-linear equations with two unknowns. In this post I will describe a much faster method, that also has the advantage that it can simply be extended to work with … Continue reading

Posted in Beam Bending, Concrete, Excel, Maths, Newton, UDFs, VBA
Tagged Exce, moment curvature, Newton's Method, solving non-linear equations, two or more unknowns, UDF, VBA
5 Comments

## Solving non-linear equations with two or more unknowns – 1

Newton’s Method is a well known iterative solution for non-linear equations with one unknown. That is, if some value Y depends on a variable X, then we can use Newton’s Method to find X for any given value of Y. … Continue reading

Posted in Beam Bending, Excel, Maths, Newton, UDFs, VBA
Tagged Brents method, Excel, moment curvature, Newton's Method, non-linear equations, two or more unknowns, UDF, VBA
2 Comments