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

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[?] Set WorkingPrecision in NIntegrate?

QUESTION FROM: Alexander Minakov | 9 years ago BY: Michael Rogers
Mathematics , Numerical Computation , Wolfram Language
3
REPLIES
8.4K
VIEWS

Sporadic convergence failure: “SingularValueDecomposition::cflsvd”

QUESTION FROM: John Sidles | 9 years ago BY: Kevin Slagle
Mathematics , Numerical Computation , Wolfram Language
5
REPLIES
7.3K
VIEWS

Find numbers with cubes?

QUESTION FROM: Alexey Podchufarov | 9 years ago BY: Alexey Podchufarov
Algebra , Discrete Mathematics , Mathematics , ...
3
REPLIES
7.7K
VIEWS

Solve a non-linear differential equations system?

QUESTION FROM: Gabriele Cinci | 9 years ago BY: Mariusz Iwaniuk
Biological Sciences , Calculus , Equation Solving , Mathematics , ...
10
REPLIES
14.1K
VIEWS

Create charts or animation of a Pursuit Curve?

QUESTION FROM: pawel kowalski | 9 years ago BY: pawel kowalski
Calculus , Demonstrations , Equation Solving , ...
4
REPLIES
12.2K
VIEWS

[NOGIF] The taut string as an anharmonic oscillator

CONTRIBUTED BY: Brad Klee | 10 years ago
Audio, Sound and Music , Calculus , Discrete Mathematics , ...
0
REPLIES
4.7K
VIEWS

Writing a loop for multiple derivatives along roots for each derivative?

QUESTION FROM: Brandon Davis | 10 years ago BY: Okkes Dulgerci
Equation Solving , Mathematics , Numerical Computation , ...
5
REPLIES
6.3K
VIEWS

Solve system of equations with NSolve?

QUESTION FROM: Eft Rsd | 10 years ago BY: Gianluca Gorni
Equation Solving , Mathematics , Numerical Computation , ...
6
REPLIES
9.3K
VIEWS

Fibonnaci algorithm - explanation for syntax

QUESTION FROM: Tom Zinger | 10 years ago BY: Gianluca Gorni
Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
6.8K
VIEWS

Fitting (x,y) data to model, with more weight at higher y values

QUESTION FROM: David Kirkby | 10 years ago BY: David Kirkby
Engineering , Modeling , Numerical Computation , Wolfram Language
5
REPLIES
9.6K
VIEWS

Interpolation for multi-dimensional functions

QUESTION FROM: Rene Samson | 10 years ago BY: Rene Samson
Discrete Mathematics , Mathematics , Numerical Computation , ...
10
REPLIES
20.3K
VIEWS

Can you understand this speed up to NSum?

QUESTION FROM: Marvin Ray Burns A.G.S. (cum laude) | 10 years ago BY: Daniel Lichtblau
Mathematica , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
6K
VIEWS

Finding Happy/Sad Numbers

QUESTION FROM: Anonymous User | 10 years ago BY: Eric Rimbey
Mathematics , Numerical Computation , Wolfram Language
14
REPLIES
9.8K
VIEWS

NSolve Method -> Automatic Has Problems

CONTRIBUTED BY: Frank Kampas | 11 years ago BY: Daniel Lichtblau
Numerical Computation
3
REPLIES
3.7K
VIEWS

An interesting property of AlgebraicNumber

CONTRIBUTED BY: John Doty | 11 years ago BY: John Doty
Algebra , Mathematica , Numerical Computation
2
REPLIES
7.4K
VIEWS

3D interpolation, memory problem?

QUESTION FROM: Artemiy Shamkin | 11 years ago BY: Sean Clarke
Optimization , Numerical Computation , Wolfram Language
2
REPLIES
6.7K
VIEWS

Efficient method to cyclically swap items in a list

QUESTION FROM: Paul Cleary | 11 years ago BY: Wiel Aerts
Data Science , Engineering , Mathematica , Optimization , ...
6
REPLIES
10.9K
VIEWS

Is there an upper limit to Solve?

QUESTION FROM: Paul Cleary | 11 years ago BY: Paul Cleary
Equation Solving , Mathematica , Mathematics , ...
2
REPLIES
5.7K
VIEWS

Out of Memory from Summation

QUESTION FROM: Jeff Albert | 11 years ago BY: Jeff Albert
High-Performance Computing , Numerical Computation , ...
2
REPLIES
5.2K
VIEWS

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

QUESTION FROM: Marcolino R-M | 11 years ago BY: Marcolino R-M
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
3
REPLIES
13.3K
VIEWS

Why does the author add ` backtick on the number?

QUESTION FROM: steve ma | 11 years ago BY: Bill Simpson
Numerical Computation , Wolfram Language
1
REPLIES
7.3K
VIEWS

"AccuracyGoal" and NDSolve

QUESTION FROM: Richard Dir | 11 years ago BY: Sean Clarke
Calculus , Numerical Computation , Wolfram Language
1
REPLIES
5.8K
VIEWS

LogLogPlot errors

QUESTION FROM: Leos Pohl | 11 years ago BY: Shenghui Yang
Graphics and Visualization , Mathematica , Numerical Computation
3
REPLIES
7.1K
VIEWS

Puzzled by FindClusters on a set of dates with a custom DistanceFunction

QUESTION FROM: David Reiss | 11 years ago BY: David Reiss
Data Science , Discrete Mathematics , Mathematica , Mathematics , ...
2
REPLIES
10K
VIEWS

Precision in NDSolve

QUESTION FROM: Francois Fayard | 11 years ago BY: Frank Kampas
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
5
REPLIES
10.7K
VIEWS

Why the heat equation doesn't work with NDSolve?

QUESTION FROM: Jo R | 11 years ago BY: Jo R
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
11
REPLIES
11.3K
VIEWS

Im having trouble making a few lines of code work within manipulate

QUESTION FROM: jethro holcroft | 11 years ago BY: Bruce Miller
Dynamic Interactivity , Graphics and Visualization , ...
2
REPLIES
12.3K
VIEWS

WhenEvent issue with vector valued diffeq

QUESTION FROM: David Keith | 12 years ago BY: David Keith
Calculus , Equation Solving , Mathematica , Numerical Computation , ...
4
REPLIES
8.8K
VIEWS

How do I tell the Base Conversion Calculator how many digits there are?

QUESTION FROM: Aaron Ingebrigtsen | 12 years ago BY: Aaron Ingebrigtsen
Mathematica , Numerical Computation , Wolfram Language
2
REPLIES
7.8K
VIEWS

error in N // Floor? (corrected version)

QUESTION FROM: Peter Quedens | 12 years ago BY: Ilian Gachevski
Mathematica , Numerical Computation , Wolfram Language
5
REPLIES
6.2K
VIEWS

Gauss iteration method-nestlist-stopping criteria

QUESTION FROM: selahittin cinar | 12 years ago BY: Daniel Lichtblau
Mathematica , Mathematics , Numerical Computation
4
REPLIES
5.2K
VIEWS

Setting global precision and decimals

QUESTION FROM: Anne-Claire Martines | 12 years ago BY: Anne-Claire Martines
Biological Sciences , Equation Solving , Mathematica , Modeling , ...
6
REPLIES
11.7K
VIEWS

Find k point that minimize the variance between the items in a numeric set

QUESTION FROM: david Bernard | 12 years ago BY: Daniel Lichtblau
Mathematica , Optimization , Numerical Computation , Wolfram Language
4
REPLIES
3.9K
VIEWS

Portfolio Optimization - FindMinimum vs NMinimize

QUESTION FROM: Tim Mayes | 12 years ago BY: Frank Kampas
Finance , Mathematica , Optimization , Numerical Computation , ...
3
REPLIES
9K
VIEWS

FindMinimum Variable Independence Puzzle

QUESTION FROM: Frank Kampas | 12 years ago BY: Frank Kampas
Optimization , Numerical Computation , Wolfram Language
2
REPLIES
2.8K
VIEWS

Navier–Stokes equations

QUESTION FROM: sa sa | 12 years ago BY: Vitaliy Kaurov
Numerical Computation , Wolfram Language
1
REPLIES
5.9K
VIEWS

loading NonlinearModelFit in Mathematica 6

QUESTION FROM: mark hixon | 12 years ago BY: Frank Kampas
Mathematica , Modeling , Numerical Computation , Wolfram Language
3
REPLIES
4.4K
VIEWS

Stochastic root finding with Mathematica

QUESTION FROM: Szabolcs Horvát | 12 years ago BY: Szabolcs Horvát
Mathematica , Numerical Computation , Statistics and Probability , ...
2
REPLIES
4.9K
VIEWS

solving a set of algebraic equations

QUESTION FROM: nirupama radhakrishnan | 12 years ago BY: Bruce Miller
Algebra , Numerical Computation , Wolfram|Alpha , Wolfram Language
2
REPLIES
8.2K
VIEWS

NIntegrate failed to converge

QUESTION FROM: Scott Shaw | 12 years ago BY: Bill Simpson
Chemical Engineering , Mathematica , Numerical Computation , ...
1
REPLIES
19.1K
VIEWS

Wrong numerical value

QUESTION FROM: M. R. | 12 years ago BY: Marco Thiel
Calculus , Mathematica , Numerical Computation , Wolfram Language
3
REPLIES
9.8K
VIEWS

Speeding up the FindMinimum function

QUESTION FROM: Matty Mookerjee | 12 years ago BY: Daniel Lichtblau
Mathematica , Optimization , Numerical Computation , Wolfram Language
8
REPLIES
13.7K
VIEWS

Optimization without generating a huge analytical expression?

QUESTION FROM: anon ymous | 12 years ago BY: Updating Name
Algebra , Mathematica , Optimization , Numerical Computation , ...
2
REPLIES
5.2K
VIEWS

Verifying extracted curve fitting parameters.

QUESTION FROM: Ram K | 12 years ago BY: Ram K
Optimization , Numerical Computation , Wolfram Language
5
REPLIES
6.4K
VIEWS

Table Command Not Working as Expected

QUESTION FROM: Tim Mayes | 12 years ago BY: Tim Mayes
Mathematica , Numerical Computation
3
REPLIES
4.4K
VIEWS

Numerical solution of one dimensional Schrodinger equation

QUESTION FROM: Mojtaba M | 12 years ago BY: Michael Hale
Calculus , Mathematica , Numerical Computation , Physics , ...
4
REPLIES
20.8K
VIEWS

FindFit built-in symbol: error doesn't make sense

QUESTION FROM: Ram K | 12 years ago BY: Ram K
Mathematica , Optimization , Mathematics , Numerical Computation
5
REPLIES
6.4K
VIEWS

How to find global minimum value for big, exact objective function

QUESTION FROM: Usman Rauf | 12 years ago BY: Bill Simpson
Equation Solving , Mathematica , Numerical Computation , ...
3
REPLIES
6.1K
VIEWS

Optimization of Matrix-valued function

QUESTION FROM: Usman Rauf | 12 years ago BY: Usman Rauf
Mathematica , Optimization , Numerical Computation , Wolfram Language
4
REPLIES
7.5K
VIEWS

Optimize Function Module using NMinimize

QUESTION FROM: brama gatech | 12 years ago BY: brama gatech
Mathematica , Numerical Computation , Tuning and Debugging , ...
15
REPLIES
12.4K
VIEWS

Gaussian+Lorentzian Fitting?

QUESTION FROM: Gregorio Martinez | 12 years ago BY: Gregorio Martinez
Graphics and Visualization , Mathematica , Numerical Computation , ...
2
REPLIES
15.4K
VIEWS

Mathematica tries to evaluate numerical functions symbolically.

QUESTION FROM: David Golber | 12 years ago BY: Michael Gmirkin
Mathematica , Numerical Computation , Wolfram Language
3
REPLIES
12.3K
VIEWS

Has anyone seen a bug with NDSolve using both Floor and a transformation?

QUESTION FROM: Jamby Humbert | 12 years ago BY: Sean Clarke
Equation Solving , Mathematica , Modeling , Numerical Computation
1
REPLIES
9.1K
VIEWS

LeastSquares inconsistencies: Array and SparseArray objects of Complex Nums

QUESTION FROM: Todor Latev | 12 years ago BY: Todor Latev
Mathematica , Mathematics , Numerical Computation , ...
2
REPLIES
11.5K
VIEWS

Solve Nonlinear 2nd Order Partial Differential Equation Numerically?

QUESTION FROM: Chirag Agrawal | 13 years ago BY: Chirag Agrawal
Calculus , Equation Solving , Mathematica , Mathematics , ...
2
REPLIES
16.7K
VIEWS

Changing differential equation during NDSolve evaluation

QUESTION FROM: Pat Mac | 13 years ago BY: Pat Mac
Equation Solving , Mathematica , Mathematics , ...
4
REPLIES
8.9K
VIEWS

How to solve Wave Equation numerically?

QUESTION FROM: Matthias Redies | 13 years ago BY: EDITORIAL BOARD
Calculus , Equation Solving , Mathematica , Mathematics , ...
2
REPLIES
10.4K
VIEWS

Numerical and Analytic plots don't overlap.

QUESTION FROM: Davi Dantas | 13 years ago BY: Davi Dantas
Graphics and Visualization , Mathematica , Numerical Computation , ...
2
REPLIES
4.1K
VIEWS

Should LinearSolve warn that this matrix is singular?

QUESTION FROM: Szabolcs Horvát | 13 years ago BY: Youngjoo Chung
Mathematica , Mathematics , Numerical Computation
1
REPLIES
8.1K
VIEWS

Need help optimizing a compiled function.

QUESTION FROM: Jordan Hoffmann | 13 years ago BY: Abdul Dakkak
Optimization , Numerical Computation , Wolfram Language
1
REPLIES
7.7K
VIEWS

LibraryLink Example

QUESTION FROM: Asim Ansari | 13 years ago BY: Todd Gayley
Compilation , High-Performance Computing , Mathematica , ...
3
REPLIES
18.1K
VIEWS

Surface parametrization interpolation

QUESTION FROM: Andy Sageman-Furnas | 13 years ago BY: Andy Sageman-Furnas
Calculus , Discrete Mathematics , Geometry , Mathematica , ...
3
REPLIES
11.7K
VIEWS

Looking for help cleaning up a Mathematica notebook into a reference implementation

QUESTION FROM: Merlin Stampa | 2 months ago BY: Eric Rimbey
Control Systems , Equation Solving , Jobs & More Exchange , ...
3
REPLIES
370
VIEWS

Terminal fall velocity of a sphere for various Reynolds numbers

CONTRIBUTED BY: Housam Binous | 2 months ago BY: EDITORIAL BOARD
Staff Picks , Calculus , Graphics and Visualization , ...
1
REPLIES
462
VIEWS

Transient rise of mercury in a barometer under atmospheric pressure

CONTRIBUTED BY: Housam Binous | 2 months ago
Calculus , Graphics and Visualization , Numerical Computation , ...
0
REPLIES
216
VIEWS

Can one use WhenEvent to react to NDSolve failures?

QUESTION FROM: Leslaw Bieniasz | 3 months ago BY: Michael Rogers
Calculus , Equation Solving , Numerical Computation , Wolfram Language
1
REPLIES
355
VIEWS

QuasiConical quantum dot with impurity: numerical calculations

CONTRIBUTED BY: Arsen Samsonyan | 5 months ago
Graphics and Visualization , Numerical Computation , Physics , ...
0
REPLIES
500
VIEWS

Pareto chart for gasification of eucalyptus wood sawdust

CONTRIBUTED BY: Housam Binous | 5 months ago BY: EDITORIAL BOARD
Staff Picks , Chemistry , Engineering , Graphics and Visualization , ...
1
REPLIES
841
VIEWS

Even closer, and more efficient approximations to the MRB constant

CONTRIBUTED BY: Marvin Ray Burns A.G.S. (cum laude) | 5 months ago
Mathematics , Numerical Computation , Wolfram Language
0
REPLIES
1.1K
VIEWS

Numerical test for divergence/convergence of integrals on (0, $\infty$)

QUESTION FROM: Denis Ivanov | 6 months ago BY: Gianluca Gorni
Calculus , Mathematics , Numerical Computation , ...
1
REPLIES
1K
VIEWS

Maximizing the Area of an Inscribed Rectangle in an Ellipse with FindMaximum

CONTRIBUTED BY: Housam Binous | 6 months ago
Engineering , Graphics and Visualization , Optimization , ...
0
REPLIES
547
VIEWS

Temperature determination from concentration data for series reactions in a batch reactor

CONTRIBUTED BY: Housam Binous | 6 months ago BY: EDITORIAL BOARD
Staff Picks , Chemistry , Engineering , Graphics and Visualization , ...
1
REPLIES
1K
VIEWS

Gas absorption with chemical reaction in an agitated tank

CONTRIBUTED BY: Housam Binous | 7 months ago
Chemistry , Engineering , Graphics and Visualization , Modeling , ...
0
REPLIES
863
VIEWS

Computing integral errors: Mathematica vs Matlab Simulink

QUESTION FROM: Housam Binous | 7 months ago
Chemistry , Control Systems , Engineering , ...
0
REPLIES
865
VIEWS

All azeotropes of a quaternary system by bifurcation

CONTRIBUTED BY: Housam Binous | 9 months ago
Chemistry , Data Science , Engineering , Graphics and Visualization , ...
0
REPLIES
688
VIEWS

All roots of the Van der Waals equation of state using homotopy

CONTRIBUTED BY: Housam Binous | 10 months ago BY: EDITORIAL BOARD
Staff Picks , Chemistry , Engineering , Graphics and Visualization , ...
1
REPLIES
2K
VIEWS

How to speed up numerical calculations of the inverse method in game theory？

QUESTION FROM: yanshao Wang | 11 months ago BY: yanshao Wang
Optimization , Mathematics , Numerical Computation , ...
1
REPLIES
1.5K
VIEWS

Refrigeration cycle with Freon 12

CONTRIBUTED BY: Housam Binous | 1 year ago
Chemistry , Engineering , Graphics and Visualization , ...
0
REPLIES
1K
VIEWS

Issue with contour plot

QUESTION FROM: Debojyoti Mondal | 1 year ago BY: Gianluca Gorni
Equation Solving , Graphics and Visualization , Mathematics , ...
1
REPLIES
1.8K
VIEWS

Possible error in solving elliptic integral

QUESTION FROM: José Luis Garrido | 2 years ago BY: Mariusz Iwaniuk
Calculus , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
1.6K
VIEWS

Co-current membrane model for Helium enrichment from natural gas

CONTRIBUTED BY: Housam Binous | 2 years ago
Chemistry , Engineering , Graphics and Visualization , Modeling , ...
0
REPLIES
1K
VIEWS

Multicomponent gas separation using a counter-current permeation model

CONTRIBUTED BY: Housam Binous | 2 years ago
Chemistry , Engineering , Graphics and Visualization , Modeling , ...
0
REPLIES
1.1K
VIEWS

Considerations for numerically solving a set of differential equation

QUESTION FROM: Mishal Mohanlal | 2 years ago BY: Michael Rogers
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
1
REPLIES
2K
VIEWS

Convection diffusion equation solve in a rectangular domain

QUESTION FROM: Mohammad Yeasin | 2 years ago BY: Henrik Schachner
Algebra , Engineering , Equation Solving , ...
1
REPLIES
1.7K
VIEWS

How can i correct this NIntegrate code?

QUESTION FROM: Minaa Askari | 2 years ago BY: Gianluca Gorni
Calculus , Mathematics , Numerical Computation , Wolfram Language
1
REPLIES
1.4K
VIEWS

NIntegrate error while finding fully differential cross section

QUESTION FROM: Minaa Askari | 2 years ago BY: Minaa Askari
Calculus , Mathematics , Numerical Computation , Physics , ...
2
REPLIES
1.8K
VIEWS

Running the Wolfram Engine from Python

CONTRIBUTED BY: Mishal Mohanlal | 2 years ago
Calculus , Equation Solving , External Programs and Systems , ...
0
REPLIES
1.9K
VIEWS

Numerical Integration of interpolated function returning a list

QUESTION FROM: Giorgio Busoni | 2 years ago BY: Michael Rogers
Calculus , Mathematics , Numerical Computation , Wolfram Language
2
REPLIES
1.7K
VIEWS

Fogler's isothermal laminar flow reactor solved using the finite difference method

CONTRIBUTED BY: Housam Binous | 2 years ago
Chemistry , Engineering , Graphics and Visualization , Modeling , ...
0
REPLIES
1.1K
VIEWS

Error using NDSolve

QUESTION FROM: J McDonald | 2 years ago BY: EDITORIAL BOARD
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
1.9K
VIEWS

Operation of a dividing wall column and a Petlyuk column

CONTRIBUTED BY: Housam Binous | 2 years ago
Chemistry , Engineering , Graphics and Visualization , Mathematics , ...
0
REPLIES
1.7K
VIEWS

Heat transfer in a bar with rectangular cross section

CONTRIBUTED BY: Housam Binous | 2 years ago
Chemistry , Engineering , Graphics and Visualization , Mathematics , ...
0
REPLIES
1.4K
VIEWS

Sundaresan-Krishnaswamy Technique for Estimation of Process Parameters

CONTRIBUTED BY: Housam Binous | 2 years ago
Control Systems , Graphics and Visualization , Mathematics , ...
0
REPLIES
1.9K
VIEWS

Performance characteristics for step response of an underdamped process

CONTRIBUTED BY: Housam Binous | 2 years ago
Chemistry , Control Systems , Engineering , ...
0
REPLIES
1.2K
VIEWS

Recursion depth of 1024 exceeded error

QUESTION FROM: Anne Shirley | 2 years ago BY: Gianluca Gorni
Calculus , Mathematics , Numerical Computation , ...
2
REPLIES
2.6K
VIEWS

How to eliminate the divide by zero error in NDSolve by implicit methods on fixed grids?

QUESTION FROM: Leslaw Bieniasz | 2 years ago BY: Michael Rogers
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
15
REPLIES
5.8K
VIEWS

Why I get obscure error messages in NDSolve?

QUESTION FROM: Leslaw Bieniasz | 2 years ago BY: Kuba Sunderland-Ober
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
3.1K
VIEWS

Unsteady Diffusion Problem in Spherical Coordinates using the Orthogonal Collocation Method

CONTRIBUTED BY: Housam Binous | 2 years ago
Calculus , Chemistry , Geometry , Graphics and Visualization , ...
0
REPLIES
1.1K
VIEWS

What is the best accuracy available, of PDE solving?

QUESTION FROM: Leslaw Bieniasz | 2 years ago BY: Updating Name
Calculus , Equation Solving , Mathematics , Numerical Computation , ...
2
REPLIES
2.2K
VIEWS

Moody Diagram versus Colebrook - White Equation using Arc-Length Continuation

CONTRIBUTED BY: Housam Binous | 2 years ago BY: EDITORIAL BOARD
Staff Picks , Calculus , Chemistry , Engineering , ...
1
REPLIES
6.2K
VIEWS
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