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Questions tagged [error]

Questions seeking help understanding error messages and fixing errors.

0
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0answers
31 views

NIntegrate weird behaviour inside a function

I wrote this little function ...
0
votes
1answer
18 views

NIntegrate: The integrand has evaluated to non-numerical values for all sampling points in the region with boundaries {}{}

I encountered a problem with the NIntegrate function while simulating a physical situation. The expression is quite messy, but it is just an integration over a polynomial so it should be possible. I ...
0
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0answers
44 views

Nominal problem with Solve, Reduce, FindRoot out

I try to solve the following system but I had the error message. ...
0
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0answers
12 views

NDSolve: Method of Lines: same grids for spatial discretization: error: stiff system_zero step size

How can I modify bbgofrey's answer so as to use $n+1$ grid points for variable $y$? My code ...
1
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0answers
29 views

ProteinData Error: “Cannot import data as PDS format”

I'm trying to use the mathematica examples for plotting Proteins: But when I type the command I get the next error: How can I import data as PDB format?
1
vote
1answer
121 views

On double summation with Mathematica

Today I wanted to evaluate this sum using Mathematica: $$f(a,b):=\sum_{(k,l)\in\mathbb{Z}^2,\ l\ne0}\frac{1}{(2 i k a \pi + l b) (2 i (k - l) a \pi + l b)}$$ ...
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0answers
23 views

Linking multipage forms together

I am trying to develop a web form wherein the first page asks users how many cities they would like to compare, and the second page dynamically creates that many input boxes. Once the user inputs the ...
0
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0answers
21 views
0
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2answers
70 views

I want to erase the error

Error message does not disappear. I can not solve the same number of solve expression and variable. Please tell me some advice. ...
0
votes
1answer
23 views

error list log plot

In error list plot what command I will use for denoting the range of X axis? ...
0
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0answers
19 views

Problem with small program: Error: “Charting Private pvar”

Im in the making of a smaller self-running application. I have made a small piece of the program as it has to look in the end. However, sometimes when i change some of the input for either "demand" or ...
1
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0answers
23 views

Find errors in collapsed notebook

I usually keep my notebooks collapsed to make understanding what's going on easier. The problem is that if there's an execution error, I have to expand everything in order to even know that there was ...
1
vote
1answer
68 views

NDSolve:PDE system, initial-boundary value problem:warning:NDSolve::mconly: For the method NDSolve`IDA, only machine real code is available

I tried to NDSolve the PDE system $$\partial_t w =x\cdot w\quad\quad\partial_z x=w$$ for $$(t,z)\in[0,1]\times[0,\pi]$$ with boundary conditions $$x(t,0)=w(t,0)=w(t,\pi)=0$$ and initial conditions $$w(...
3
votes
2answers
138 views

NDSolve:Coupled PDE's, initial-boundary value problem: unreasonable “insufficient number of boundary conditions” error

I tried to NDSolve the PDE system: $$\partial_t y = x\partial_z w \quad\quad \partial_t w = \partial_z y \quad \quad \partial_z x=w $$ for $$(t,z)\in[0,1]\times[-1,0]$$ with initial conditions $$x(...
0
votes
1answer
48 views

Increase in area under the curve as standard deviation decreases? Not what I expect

Suppose I have a PDF with mean a and standard deviation b defined as below. As the value of k increases, a should decrease, while b should also decrease. This should cause a decrease in the output, ...
0
votes
0answers
47 views

problem to solve a non linear equation

variable[[i]]-(1/Pi)((t/2 - 1)*(Pi-2Sqrt[t-1]+2/3(t-1)^(3/2))+(-1+4/(3t)+4/(3t^2))Sqrt[(t-1)])==0 This is the equation but the problem is that the solution is ...
5
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0answers
50 views

How to prevent the message: Not enough memory to display a cell

While running a single-cell GUI application that repeatedly changes and refreshes its content I got this message: There was not enough memory to display a cell... I found in this old MathGroup thread ...
0
votes
1answer
79 views

Main function in my package doesn't work

I am new to Mathematica package development and I have been trying to write and run some simple packages to get a feel for it. I wrote the following package. My aim is to define a package which has ...
0
votes
2answers
89 views

Integrals of a Fourth order differential equation: Part B

I want to continue this topics (enter link description here): Is it possible for us to get the value for integrals of a Fourth order differential equation (But) which includes a constant parameter? ...
0
votes
2answers
62 views

Integrals of a Fourth order differential equation: Part A

Is it possible for us to get the value for integrals of a Fourth order differential equation in MMA. I attach the code that i have used in MMA: ...
0
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0answers
50 views

Integral converges only if Mathematica kernel has just started?

After just starting Mathematica (or quitting the kernel) if I run: ...
2
votes
1answer
49 views

DifferentialRoot with parameters that “are not exact numbers”

In the course of developing an answer to 185859, I encountered the following difficulty. With ...
1
vote
1answer
21 views

Getting error RSolve::dsfun [closed]

I an trying to solve a recursive formula and find the explicit representation of $a$. $a_0 = 1$ $a_{n+1} = 3 \sum\limits_{i=0}^{n} a_i$ When I evaluate ...
1
vote
1answer
46 views

Combining ListLinePlot graphics with Show

I'm new to Mathematica working on a project for school. I'm trying to show the deflection of a cord over time by breaking it up into 14 points and plotting the x,y coordinates of each point over time. ...
1
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0answers
85 views

Why this issue with Workbench?

I just installed the current version of Eclipse and then the current version of Workbench 2 by following the online instructions at the Wolfram site for installing it as a plugin. I can create a ...
1
vote
0answers
57 views

OpenMATLAB[] hangs

I just migrated my Mac from one machine to a new one and it seems like MATLink is broken now. When I call OpenMATLAB[] in Mathematica the command hangs forever. I ...
-1
votes
1answer
76 views

Solve equation: Exponent is out of bounds for function PolynomialGCD

I am trying to solve the equation below but it returns this error :Exponent is out of bounds for function PolynomialGCD". I would be gratuful if you someone help to solve this equation. ...
1
vote
1answer
30 views

Is there a problem using Check and Quiet with LinearModelFit?

I am using LinearModelFit in conjunction with Quiet and Check because I need to control when ...
0
votes
0answers
31 views

NDSolve dealing with message infinite expression and non numerical value non homogeneous differential equation

I'm trying to solve the following differential equation with some specific conditions ...
0
votes
1answer
49 views

How to optimize this script?

fx8350, 16Gb ram just need to solve this: 13, 19, 19, 16, 26, 33, 26, 31, 5, 24, 21, 34, 35, 35, 35, 20, 7, 12, 18, 17, 6, 8, 15, 24, 2, 17, 15, 22, 29, 15, 21
0
votes
1answer
139 views

The movement of the point in orbit is one hundred long timesteps

This list will produce a circular orbital plot: ...
-1
votes
1answer
80 views

nlnum problem of NDSolve

I'm having a difficulty to NDSolve a ODE due to nlnum (according to the error message). Below is the code I have. First of all are functions: ...
1
vote
2answers
115 views

Getting error NDSolve::ndsz from my ODE

I'm trying to figure out why I am consistently getting singularity error when I'm trying to solve an ODE using NDSolve. Any help will be appreciated. ...
1
vote
1answer
42 views

How to change the integral variable and integral upper/lower limit?

I am dealing with the symbolic operation of taking the antiderivative, e.g., Integrate[f, x] (where $f$ represents a complicated function which cannot return ...
1
vote
1answer
45 views

An error of unequal length when using Transpose[y]? [closed]

Why do I get this error? I just clicked shift+enter in the y and it appeared. https://i.stack.imgur.com/IAKs8.png This is the data ...
1
vote
0answers
39 views

Mathematica stops showing messages, how to get them back?

I realized that, for an identical expression, sometimes I get an error message and sometimes I don't. If I then shut down and restart Mathematica, messages are back. How can I get messages back ...
0
votes
2answers
152 views

Wolfram Mathematica on mac os Mojave

I found out that Apple stop support programms with 32-bit architecture in new Mac OS Mojave, has anyone already updated??? I want to see new dark mode, but if WM will stop working it will be a problem....
2
votes
3answers
365 views

Solve piecewise function

I have two piecewise function ...
1
vote
1answer
66 views

Estimation of the error for zero degree of freedom fit with error bar

I am performing a fit on experimental data with zero degree of freedom but with error bar using NonlinearModelFit: ...
1
vote
1answer
47 views

Compile errors after reloading of laptop contents after challenging MacOS Mojave installation

I tried (foolhardily, it appears) installing macOS Mojave Version10.4 on my MacBookAir, but encountered major problems--that seemed to have been (finally) fixed after a reinstallation and reloading of ...
1
vote
1answer
25 views

ScalingFunctions produces a warning on ListDensityPlot

Using ScalingFunctions in a ListDensityPlot produces a warning "An unknown option name has been used." Yet, the code still seems ...
1
vote
2answers
71 views

Solving an ODE with a sign/step function which depends on the time derivative

I'm trying to solve a set of ODEs with a Heaviside step function which depends on the sign of the derivative of the function. This is a simplifying example of what I'm trying to do ...
0
votes
1answer
79 views

Problem with fitting square root-like function

I have following data: ...
1
vote
1answer
62 views

Is it possible to open this corrupted file

I get the following message: There was a syntax error on line 23 in the file: Petrin_methodu_ile.nb. The error was: When I open the file I just get the ...
1
vote
1answer
27 views

Problem with building graphic using ListPlot [closed]

I want to build the graphic using ListPlot but it doesn't work. I get list in next form: ...
-1
votes
1answer
84 views

Getting errors NIntegrate::nlim and NIntegrate::slwcon [closed]

Here is the modified question: First: Define phi[x_]:=Piecewise[{{1, 0 <= x < 1}}, 0] ...
0
votes
0answers
37 views

Understanding BoundaryMeshRegion error

I am trying to calculate the difference between two Cuboids: ...
-1
votes
4answers
93 views

Problem with NIntegrate over a highly-oscillatory integrand

I'm trying to numerically evaluate the integral $$\int_{a}^{b}\mathop{\mathrm{d}x}\int_{x}^{b}\frac{\sin(x-y)}{xy}\mathop{\mathrm{d}y}$$ using Mathematica. To do that, I the function ...
0
votes
0answers
28 views

Document Center Search is not working in Mathematica 11.3?

If I type "Table" (without the quotes, of course) or any other search term into the Documentation Center search, I get: ...