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Numeric equation solving, calculus and statistics, precision and accuracy control for numeric computations...

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How to use NMinimize on a mesh?

QUESTION FROM: Jonatan Lehtonen | 11 years ago BY: Ilian Gachevski
Geometry , Graphics and Visualization , Mathematica , ...
4
REPLIES
125K
VIEWS

Intersecting boundary problems when solving PDEs

QUESTION FROM: Marco Thiel | 10 years ago BY: Sergey Slizovskiy
Graphics and Visualization , Mathematica , Mathematics , ...
5
REPLIES
36.4K
VIEWS

Modeling a Trebuchet

QUESTION FROM: Varun Kulkarni | 9 years ago BY: Frederick Wu
Modeling , Numerical Computation , Physics , Wolfram Language
28
REPLIES
34.8K
VIEWS

How do I repeat/loop multiple functions that are related?

QUESTION FROM: Thai Kee Gan | 10 years ago BY: Thai Kee Gan
Calculus , Equation Solving , Mathematica , Optimization , ...
12
REPLIES
31.4K
VIEWS

Derivative of a list of data values

QUESTION FROM: INTAN SUPRABA | 5 years ago BY: Updating Name
Calculus , Mathematica , Numerical Computation , Wolfram Language
6
REPLIES
29.8K
VIEWS

Heat Transfer Problem

QUESTION FROM: Jon T | 12 years ago BY: Jon T
Calculus , Engineering , Equation Solving , Mathematica , ...
10
REPLIES
25.7K
VIEWS

Problem using WhenEvent to constrain solution

QUESTION FROM: Julian Lovlie | 12 years ago BY: Nicolas Venuti
Engineering , Equation Solving , Mathematica , Mathematics , ...
3
REPLIES
24.3K
VIEWS

Finding the actual wind power at a location for a given period?

QUESTION FROM: Daniel Connell | 9 years ago BY: Nicholas Teague
Environmental Science , Mathematics , Numerical Computation , ...
5
REPLIES
24.3K
VIEWS

How do I find x in a polynomial when x is approximate?

QUESTION FROM: Bobby Joe Snyder | 11 years ago BY: Bobby Joe Snyder
Equation Solving , Mathematica , Numerical Computation , ...
22
REPLIES
24.1K
VIEWS

how to solve double integral with mathematica?

QUESTION FROM: ver din | 10 years ago BY: ver din
Calculus , Mathematica , Numerical Computation , Wolfram Language
2
REPLIES
23.7K
VIEWS

FindRoot help with precision and accuracy

QUESTION FROM: Miguel Olivo-V | 10 years ago BY: Frank Kampas
Equation Solving , Mathematica , Mathematics , ...
11
REPLIES
22.9K
VIEWS

Geodesics equation - solving and plotting via Mathematica

QUESTION FROM: michal buday | 10 years ago BY: Todd Rowland
Algebra , Calculus , Equation Solving , Geometry , ...
5
REPLIES
22.5K
VIEWS

[?] NSolve[2x== 0,x] return {{}} in Mathematica 11.0.1?

QUESTION FROM: Gijsbert Wiesenekker | 8 years ago BY: Walter Haeffner
Equation Solving , Mathematica , Mathematics , ...
23
REPLIES
21K
VIEWS

Save the interpolation function that is a result of NDsolve?

QUESTION FROM: Markus Schmidt | 5 years ago BY: Tony Coliderse
Calculus , Equation Solving , Mathematics , Modeling , ...
14
REPLIES
21K
VIEWS

Performance reduction of FindMinimum in version 10

QUESTION FROM: Alexey Popkov | 6 years ago BY: Daniel Lichtblau
Mathematica , Optimization , Numerical Computation , ...
29
REPLIES
20.6K
VIEWS

Functional Programming for Non-linear Equations

QUESTION FROM: Pat Mac | 12 years ago BY: Pat Mac
Biological Sciences , Chemistry , High-Performance Computing , ...
4
REPLIES
20.2K
VIEWS

Numerical solution of one dimensional Schrodinger equation

QUESTION FROM: Mojtaba M | 11 years ago BY: Michael Hale
Calculus , Mathematica , Numerical Computation , Physics , ...
4
REPLIES
20K
VIEWS

Solving Laplace Equation using Finite Elements

QUESTION FROM: Rene Samson | 10 years ago BY: Rene Samson
Calculus , Engineering , Numerical Computation , Wolfram Language
9
REPLIES
19.9K
VIEWS

Slow Summation of values produced by recursive function

QUESTION FROM: Tom Zinger | 10 years ago BY: Tom Zinger
Mathematics , Numerical Computation , Tuning and Debugging , ...
13
REPLIES
19.8K
VIEWS

Why I am getting Abs' when I am doing derivative over a complex function?

QUESTION FROM: Ali Mousavian | 11 years ago BY: David Reiss
Numerical Computation
4
REPLIES
19.5K
VIEWS

Real-valued integral over real variable returns complex result(s)

QUESTION FROM: Jerry | 10 years ago BY: Marco Thiel
Calculus , Mathematica , Numerical Computation , Wolfram Language
7
REPLIES
19.3K
VIEWS

How Do I combine NDSolve (RungeKutta4thOrder) and Loop(For or Do) together?

QUESTION FROM: Thai Kee Gan | 10 years ago BY: Bruce Miller
Calculus , Equation Solving , Mathematica , Modeling , ...
19
REPLIES
19.3K
VIEWS

Newbie to Cuda, can I use Cuda with this graphics card?

QUESTION FROM: W. Craig Carter | 12 years ago BY: Jose Calderon
External Programs and Systems , Graphics and Visualization , ...
5
REPLIES
19.3K
VIEWS

Interpolation for multi-dimensional functions

QUESTION FROM: Rene Samson | 9 years ago BY: Rene Samson
Discrete Mathematics , Mathematics , Numerical Computation , ...
10
REPLIES
19K
VIEWS

FindRoot::nlnum: The function value s not a list of numbers with dim...

QUESTION FROM: Alessandro Menissale | 10 years ago BY: Alessandro Menissale
Compilation , Mathematica , Numerical Computation
5
REPLIES
18.8K
VIEWS

Solve the Nonlinear Schroedinger Equation with NDSolve?

QUESTION FROM: Markus Schmidt | 7 years ago BY: Markus Schmidt
Equation Solving , Mathematica , Modeling , Numerical Computation , ...
16
REPLIES
18.8K
VIEWS

NIntegrate failed to converge

QUESTION FROM: Scott Shaw | 11 years ago BY: Bill Simpson
Chemical Engineering , Mathematica , Numerical Computation , ...
1
REPLIES
18.4K
VIEWS

Interpolation, unstructured grids, and interpolation order

QUESTION FROM: W. Craig Carter | 1 year ago BY: Michael Rogers
Mathematica , Numerical Computation
7
REPLIES
18.1K
VIEWS

Get numerical solution of PDE for diffusion at high diffusion rates?

QUESTION FROM: Rutton Patel | 6 years ago BY: Rutton Patel
Calculus , Chemistry , Equation Solving , Mathematics , Modeling , ...
23
REPLIES
17.8K
VIEWS

Numerical Analysis of Non-linear Black Scholes using finite differences

QUESTION FROM: Anais Hulot | 12 years ago BY: Sander Huisman
Demonstrations , Economics , Finance , Mathematica , Mathematics , ...
4
REPLIES
17.7K
VIEWS

Bottlenecking Code

QUESTION FROM: Jake Smith | 11 years ago BY: Michael Rogers
Mathematica , Numerical Computation , Physics , Tuning and Debugging
2
REPLIES
17.5K
VIEWS

NDSolve a system of differential equations with initial conditions?

QUESTION FROM: Jose Calderon | 2 years ago BY: Gianluca Gorni
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
6
REPLIES
17.5K
VIEWS

Imperfect Bose gas nonlinear Schroedinger type ODE numerical solution

QUESTION FROM: Mattia Udina | 10 years ago BY: Michael Trott
Calculus , Mathematics , Numerical Computation , Physics , ...
37
REPLIES
17.3K
VIEWS

LibraryLink Example

QUESTION FROM: Asim Ansari | 12 years ago BY: Todd Gayley
Compilation , High-Performance Computing , Mathematica , ...
3
REPLIES
17.1K
VIEWS

How does Mathematica's Table function iterate equations?

QUESTION FROM: Matt Bergman | 10 years ago BY: Jonathan Miller
Mathematica , Mathematics , Numerical Computation , Wolfram Language
4
REPLIES
17K
VIEWS

Solve and NSolve not working well with Quantity and Units?

QUESTION FROM: Francis Bush | 5 years ago BY: Daniel Lichtblau
Algebra , Equation Solving , Mathematics , Numerical Computation , ...
44
REPLIES
16.8K
VIEWS

Numerical fitting to model that has Integral with no analytical solution

QUESTION FROM: Nick D | 12 years ago BY: Nick D
Calculus , Data Science , Engineering , Material Sciences , ...
3
REPLIES
16.5K
VIEWS

Help weird NDSolve error, system of ODE and an algebraic equation

QUESTION FROM: Renee Dale | 11 years ago BY: Guy Mongelli
Biological Sciences , Calculus , Equation Solving , Mathematica , ...
3
REPLIES
16.3K
VIEWS

Basis of factors for large degree polynomials

QUESTION FROM: Ed Pegg | 8 years ago BY: EDITORIAL BOARD
Staff Picks , Algebra , Graphics and Visualization , Group Theory , ...
2
REPLIES
16K
VIEWS

Solve Nonlinear 2nd Order Partial Differential Equation Numerically?

QUESTION FROM: Chirag Agrawal | 12 years ago BY: Chirag Agrawal
Calculus , Equation Solving , Mathematica , Mathematics , ...
2
REPLIES
16K
VIEWS

[?] Round to x significant digits before printing it?

QUESTION FROM: David Kirkby | 8 years ago BY: David Kirkby
Mathematics , Numerical Computation , Wolfram Language
10
REPLIES
15.9K
VIEWS

NonlinearModelFit screws up the fit when facing constraints

QUESTION FROM: Marcel Rothfelder | 12 years ago BY: Udo Krause
Chemistry , Mathematica , Modeling , Numerical Computation
1
REPLIES
15.8K
VIEWS

Precision vs accuracy in displaying result of numerical calculation

QUESTION FROM: Raymond Low | 3 years ago BY: Michael Rogers
Mathematics , Numerical Computation , Wolfram Language
12
REPLIES
15.6K
VIEWS

How do I use NDSolve within a Do loop?

QUESTION FROM: Henry Banks | 11 years ago BY: Michael Rogers
Equation Solving , Mathematica , Mathematics , ...
6
REPLIES
15.5K
VIEWS

Diffusion localised on the map of France

QUESTION FROM: André Dauphiné | 8 years ago BY: Ali Hashmi
Curated Data , Environmental Science , Equation Solving , ...
7
REPLIES
15.5K
VIEWS

How to do numerical integration from data set?

QUESTION FROM: luke schutzenhofer | 11 years ago BY: Sean Clarke
Calculus , Numerical Computation , Wolfram Language
7
REPLIES
15.3K
VIEWS

Hex RGB color to HSL conversion: who is right?

QUESTION FROM: Alexey Artuhov | 10 years ago BY: Simon Cadrin
Computer Science , Data Science , Numerical Computation , ...
3
REPLIES
15.3K
VIEWS

How to solve a constraint deferential equations with If function

QUESTION FROM: afshar_saman | 10 years ago BY: Bill Simpson
Calculus , Control Systems , Economics , Equation Solving , ...
1
REPLIES
15.2K
VIEWS

Define a complex number

QUESTION FROM: Ahmed Al-Ali | 11 years ago BY: Ulrich Mutze
Algebra , Calculus , Compilation , Logic and Boolean Algebra , ...
4
REPLIES
15.1K
VIEWS

Repeated interpolation for 3D unstructured grid -> Optimization

QUESTION FROM: Artemiy Shamkin | 10 years ago BY: Artemiy Shamkin
Calculus , Computational Systems , Computer Science , Mathematica , ...
2
REPLIES
14.9K
VIEWS

Gaussian+Lorentzian Fitting?

QUESTION FROM: Gregorio Martinez | 11 years ago BY: Gregorio Martinez
Graphics and Visualization , Mathematica , Numerical Computation , ...
2
REPLIES
14.8K
VIEWS

how to use the "For" here

QUESTION FROM: YU SHANG | 10 years ago BY: YU SHANG
Data Science , Mathematica , Numerical Computation , Physics , ...
7
REPLIES
14.8K
VIEWS

Illustration of fourier series for prime number counting functions

QUESTION FROM: Steven Clark | 9 years ago BY: Steven Clark
Calculus , Discrete Mathematics , Graphics and Visualization , ...
8
REPLIES
14.4K
VIEWS

How to generate this C code with Wolfram Language?

QUESTION FROM: Otto Linsuain | 9 years ago BY: Otto Linsuain
Compilation , External Programs and Systems , Mathematica , ...
2
REPLIES
14.3K
VIEWS

Mathematica evaluates numerical functions symbolically. How can I stop it?

QUESTION FROM: David Golber | 3 years ago BY: John G
Mathematica , Numerical Computation , Wolfram Language
4
REPLIES
14.2K
VIEWS

I want to perform simple math on very large numbers, how?

QUESTION FROM: Jeffrey Robinson | 11 years ago BY: Jeffrey Robinson
Numerical Computation , Wolfram|Alpha
6
REPLIES
14.2K
VIEWS

Hard Crash in Windows 10 when calculating eigenvalues of matrix

QUESTION FROM: Sam M | 6 years ago BY: Sam M
Engineering , Mathematica , Mathematics , Numerical Computation
6
REPLIES
14.2K
VIEWS

Solve 2 coupled 2nd ODEs and plot them with ParametricPlot?

QUESTION FROM: Soumen Basak | 6 years ago BY: Soumen Basak
Calculus , Computational Systems , Equation Solving , ...
14
REPLIES
14.1K
VIEWS

How to find all possible paths tracing as many edges between two vertices?

QUESTION FROM: Azhar Uddin Mohammed | 10 years ago BY: Szabolcs Horvát
Civil Engineering , Computer Science , Discrete Mathematics , ...
1
REPLIES
14K
VIEWS

Solve the Extended Generalized Bivariate Meijer G Function (EGBMGF)?

QUESTION FROM: Marko Smilic | 17 days ago BY: Mariusz Iwaniuk
Engineering , Equation Solving , Mathematics , ...
9
REPLIES
13.9K
VIEWS

Solving Black-Scholes PDE with NDSolve

QUESTION FROM: Sandu Ursu | 11 years ago BY: Sjoerd de Vries
Business Analytics , Calculus , Equation Solving , Finance , ...
2
REPLIES
13.8K
VIEWS

Unable to solve a double integration

QUESTION FROM: kok wong | 11 years ago BY: Bill Simpson
Calculus , Mathematica , Numerical Computation , Wolfram Language
6
REPLIES
13.7K
VIEWS

Mathematica 12.2 is slower than 12.1 as measured by WolframMark

QUESTION FROM: Douglas Kubler | 4 years ago BY: Elisa Herraez
Computational Systems , High-Performance Computing , Mathematica , ...
5
REPLIES
13.6K
VIEWS

Simultaneously Fit Multiple Data Sets

QUESTION FROM: Pat Mac | 12 years ago BY: Pat Mac
Mathematica , Numerical Computation , Statistics and Probability
3
REPLIES
13.5K
VIEWS

Problem: Calibration of the Duffie Pan and Singleton Model (2000)

QUESTION FROM: philipp.la | 10 years ago BY: philipp.la
Business Analytics , Mathematica , Optimization , ...
4
REPLIES
13.4K
VIEWS

Runge Kutta method to solve the Equation

QUESTION FROM: Zainab Junaid | 10 years ago BY: Zainab Junaid
Calculus , Equation Solving , Numerical Computation , Wolfram Language
7
REPLIES
13.4K
VIEWS

What went wrong with this NDSolve command usage?

QUESTION FROM: INTAN SUPRABA | 11 years ago BY: INTAN SUPRABA
Civil Engineering , Engineering , Equation Solving , Mathematics , ...
2
REPLIES
13.4K
VIEWS

Solve a non-linear differential equations system?

QUESTION FROM: Gabriele Cinci | 8 years ago BY: Mariusz Iwaniuk
Biological Sciences , Calculus , Equation Solving , Mathematics , ...
10
REPLIES
13.4K
VIEWS

Integration method used in NIntegrate

QUESTION FROM: Tomas Rihacek | 10 years ago BY: Anton Antonov
Calculus , Mathematica , Numerical Computation , Wolfram Language
5
REPLIES
13.3K
VIEWS

NDSolve ODE variable should not go below zero

QUESTION FROM: Renee Dale | 11 years ago BY: Sean Clarke
Equation Solving , Mathematica , Mathematics , Numerical Computation
1
REPLIES
13.3K
VIEWS

Faster ways to solve symmetric top problem?

QUESTION FROM: Ox Clouding | 7 years ago BY: Ox Clouding
Calculus , Equation Solving , Mathematics , Modeling , ...
17
REPLIES
13.3K
VIEWS

How to numerically compute an implicit equation?

QUESTION FROM: joaquin mendez | 12 years ago BY: joaquin mendez
Equation Solving , Mathematica , Mathematics , ...
3
REPLIES
13.2K
VIEWS

CloudDeploy issue with FormFunction and NSolve

QUESTION FROM: Balazs Kisfali | 9 years ago BY: Balazs Kisfali
Civil Engineering , Curated Data , Earth Science , ...
8
REPLIES
13.2K
VIEWS

Integrate integral C2 were the integand is a table and the output g1 table

QUESTION FROM: Luke Schutzenhofer | 11 years ago BY: Luke Schutzenhofer
Calculus , Engineering , Mathematica , Numerical Computation , ...
15
REPLIES
13.1K
VIEWS

Speeding up the FindMinimum function

QUESTION FROM: Matty Mookerjee | 11 years ago BY: Daniel Lichtblau
Mathematica , Optimization , Numerical Computation , Wolfram Language
8
REPLIES
13.1K
VIEWS

EDITED:same computation gives different results

QUESTION FROM: Mike Luntz | 10 years ago BY: Daniel Lichtblau
Numerical Computation , Symbolic Computations , Wolfram Language
7
REPLIES
13.1K
VIEWS

Calculation of the confluent hypergeometric function HypergeometricU

QUESTION FROM: Max Knoetig | 11 years ago BY: Adam Domjan
Graphics and Visualization , Mathematica , Numerical Computation , ...
3
REPLIES
13.1K
VIEWS

NDSolve for a heat differential equation with periodic boundary conditions?

QUESTION FROM: Markus Schmidt | 6 years ago BY: Henrik Schachner
Calculus , Engineering , Equation Solving , Mathematics , ...
6
REPLIES
13K
VIEWS

Problem with big input not accepted

QUESTION FROM: alberto.bottopoala | 12 years ago BY: Arnoud Buzing
High-Performance Computing , Import and Export , Numerical Computation
11
REPLIES
12.9K
VIEWS

How to Parallelize a Calculation

QUESTION FROM: Deprez Corentin | 10 years ago BY: Sean Clarke
Mathematica , Numerical Computation , Physics
6
REPLIES
12.8K
VIEWS

Need help with NDSolve

QUESTION FROM: Kaushik Mallick | 10 years ago BY: Kaushik Mallick
Calculus , Equation Solving , Mathematica , Mathematics , ...
3
REPLIES
12.8K
VIEWS

[?] Deal with "Encountered non-numeric value for a derivative at t == 0" ?

QUESTION FROM: L GonGa | 6 years ago BY: Marco Thiel
Equation Solving , Mathematics , Numerical Computation , ...
1
REPLIES
12.7K
VIEWS

Problem with Piecewise Initial Conditions in NDSolve

QUESTION FROM: Danila Zharenkov | 12 years ago BY: Danila Zharenkov
Calculus , Equation Solving , Mathematica , Mathematics , ...
8
REPLIES
12.7K
VIEWS

Solve convergence problem in two-dimentional NIntegrate?

QUESTION FROM: F TQ | 9 years ago BY: Mariusz Iwaniuk
Calculus , Control Systems , Engineering , Mathematics , ...
3
REPLIES
12.7K
VIEWS

Help me -- meprec problem

QUESTION FROM: Ain Ariff | 12 years ago BY: Daniel Lichtblau
Mathematica , Mathematics , Numerical Computation
6
REPLIES
12.7K
VIEWS

How Can I Solve A Stiff Boundary Value Problem In Mathematica 10?

QUESTION FROM: Marcolino R-M | 10 years ago BY: Marcolino R-M
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
3
REPLIES
12.7K
VIEWS

Getting Value from Interpolating Function

QUESTION FROM: Raunak Bardia | 10 years ago BY: David Keith
Calculus , Numerical Computation , Wolfram Language
4
REPLIES
12.7K
VIEWS

Iteration to solve det(l^2M+K)=0: error with ReplaceAll

QUESTION FROM: Clemence Bacquet | 12 years ago BY: Sander Huisman
Equation Solving , Numerical Computation , Tuning and Debugging , ...
2
REPLIES
12.6K
VIEWS

[WSSA16] Geo-Realistic Simulation of the Elastic Waves

QUESTION FROM: Davit Piliposyan | 9 years ago BY: EDITORIAL BOARD
Staff Picks , Equation Solving , Geographic Information System , ...
5
REPLIES
12.3K
VIEWS

[WSSA16] Geo-Realistic Simulation of the Elastic Waves

QUESTION FROM: Davit Piliposyan | 9 years ago BY: EDITORIAL BOARD
Staff Picks , Equation Solving , Geographic Information System , ...
5
REPLIES
12.3K
VIEWS

Addition and subtraction don't give exact zero?

QUESTION FROM: Yvan Abbe | 4 years ago BY: Yvan Abbe
Numerical Computation , Wolfram Language
12
REPLIES
12.2K
VIEWS

[?] Perform optimization with a strange constraint?

QUESTION FROM: Ovunc Yilmaz | 7 years ago BY: Ovunc Yilmaz
Data Science , Engineering , Optimization , Mathematics , ...
2
REPLIES
12.2K
VIEWS

Need help to speed up code to find root of determinant

QUESTION FROM: Markus Schmidt | 10 years ago BY: Markus Schmidt
Optimization , Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
12.2K
VIEWS

Numerical integration of data imported for Excel

QUESTION FROM: Luke Schutzenhofer | 11 years ago BY: David Reiss
Calculus , Import and Export , Mathematica , Numerical Computation , ...
14
REPLIES
12.1K
VIEWS

Integration after importing data, how to set the variables

QUESTION FROM: Chenyen Lee | 12 years ago BY: Paul Cleary
Mathematica , Numerical Computation
6
REPLIES
12.1K
VIEWS

Integration involving vectors?

QUESTION FROM: Arny Toynbee | 8 years ago BY: Arny Toynbee
Calculus , Mathematics , Numerical Computation , Physics , ...
13
REPLIES
12.1K
VIEWS

Why does my fit not work?

QUESTION FROM: Peter Parker | 5 years ago BY: Jason Zhao
Optimization , Numerical Computation , Wolfram Language
6
REPLIES
12.1K
VIEWS

[?] Solve a 2D heat equation inside a circular domain?

QUESTION FROM: David Quesada | 8 years ago BY: David Quesada
Equation Solving , Material Sciences , Mathematics , ...
6
REPLIES
12K
VIEWS

Improve speed to obtain numerical values of Bessel function?

QUESTION FROM: Markus Schmidt | 8 years ago BY: Markus Schmidt
Compilation , Discrete Mathematics , High-Performance Computing , ...
4
REPLIES
12K
VIEWS

Compiled function uses too much memory

QUESTION FROM: Ulrich Utiger | 1 year ago BY: Victor Kryukov
Compilation , Discrete Mathematics , High-Performance Computing , ...
12
REPLIES
12K
VIEWS
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