Least Squares Curve Fit vs Derivative-Calculus Usage & Stats
“Least Squares Curve Fit” is a user friendly, free of charge and free of ads app.
User inputs point sets and chooses function types.
Utilizing the Least Squares Linear Regression Method, the app calculates best fit curves, reports equations and draws graphs.
Point sets can be stored in a table and are available after app is closed.
Currently available function types are:
2D:
1. Line.
2. Parabola.
3. Polynomial up to 8th degree.
4. Circle.
5. Conic section (Ellipse or Hyperbola).
6. Trigonometric function as
C + A1*cos(ω*x) + B1*sin(ω*x) + … + An*cos(n*ω*x) + Bn*sin(n*ω*x),
where user can select n between 1 and 8 and enter any ω.
7. Exponential Function.
8. Bell Curve.
3D:
1. Plane.
2. Sphere.
Also, there is an option to choose the Best Fit:
the app goes through all the possible shapes and lists them in order from best to worst fit based on residuals.
In some cases, when the standard Least Squares method with orthogonal projection does not work, best fit for Line, Parabola, Polynomial and Trigonometric functions can be calculated with SVD.
Links to four other free apps by same developers are included in the app:
1. “Matrix Solver Step by Step” Linear Algebra Visual Guide.
2. “Polynomials and Linear Systems” Equation Solver.
3. “GraphMath” Graphing Calculator.
4. “Vectors and Planes” (and Spheres and Ellipsoids) 3D Geometry Guide.
Developers hope to get feedback from users at graphmath@aol.com.
- Apple App Store
- Free
- Education
Store Rank
- -
The DerivativeCalculus is a simple but elegant app to find the derivatives of complex multivariable functions.
You can find the partial derivatives of a multivariate function and share it with others or save it locally.
You can create a beautiful high quality partial derivative tree and share it with others or save it locally.
Derivatives are shown in beautifully written mathematical expression
It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort will not be lost.
This app also has a Study page to help you learn important differentiation rules like, product rule, chain rule, quotient rule, ect.
This app is perfect for students learning calculus.
Sharpen you brain by using this app and learning about the calculus.
This is an app for all student groups. From high school to college to university students.
Be creative. Enjoy the app!
- Apple App Store
- Free
- Education
Store Rank
- -
Least Squares Curve Fit VS. 
Derivative-CalculusDecember 16, 2024