Questions tagged [warning-messages]

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Please help me to find my error Please [closed]

I spent two weeks trying to fix this error the program show my this:: NIntegrate::inumr: The integrand (0.0131326 r Sin[q r])/(1+(E^(1.75439 Plus[<<2>>])+E^(1.75439 Plus[<<2>>]...
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1answer
29 views

Issue with transferring list with different length to excel

I have two lists with different lengths and would like to transfer them to excel with the titles "Normalx+" and "Normaly+" respectively. I am using the following script, although ...
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0answers
32 views

Numerical Definite Integral of Numerical Laplace Transform

I'm having problem taking the numerical definite integral of a numerical Laplace transform that depends on two variables due to NIntegrate:inumr errors: ...
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38 views

Understanding NDSolve error messages [closed]

I am trying to solve two coupled nonlinear differential equation using NDSolve but this gives me an error every time: ...
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1answer
34 views

Correcting error messages emitted by ListPlot

I have an assignment to use Module and in which I have to implement: The input of the program are a list of numbers and a list of strings Check whether every ...
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0answers
48 views

Problem with Region Intersection

I have two regions defined as ImplicitRegion[]. ...
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1answer
74 views

How to implement an “if an error occurs”-condition in Mathematica programming?

In general Mathematica may return a value even if NDSolve has run into error. A simple example is ...
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1answer
47 views

'x' occurs twice in a nested scoping construct, in a way that is likely to be an error

I am defining the following innocent looking function (which defines a linear function passing through two given points): ...
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0answers
29 views

After any execution temporary error comes out ,How to fix error in temporary directory

how can I repair this error that started to come out of nowhere, I have not made any changes in the equipment but mathematica accuses that error ...
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17 views

Confusion about EstimatedProcess::ntsprt error

Given the data as follows, ...
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32 views

Nintegrate providing results much smaller than what is expected

This is the first time I am posting something here. So, apologies if I make any mistake. I am dealing with a numerical integration in Mathematica-11.0 that has a Bessel function in it. In order to ...
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0answers
32 views

NDSolve w/ vector-valued function doesn't work with addition of outside function?

I'm trying to use Mathematica to solve a problem of orbits, specifically solving for the trajectory of a spacecraft moving near the Earth and Moon. I assume that the Earth is fixed at the center of ...
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1answer
49 views

Nonlinearmodelfit with integral or nintegral as constrain

Until now I have been using the Nonlinearmodelfit without any issues, but I want to add a new constrain (Integral or NIntegral) to my modelfit. My fitting function is ...
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1answer
71 views

NIntegrate::slwcon, NIntegrate::eincr and NIntegrate::inumri

I have the following code to evaluate the double integral of which the integrand contains summations. ...
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0answers
23 views

Importing notebooks with definitions that cause messages during formatting

According to reference pages, Quiet "does not quiet messages that occur during formatting", which typically is just a nuisance, but it seems to affect ...
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1answer
82 views

General::ivar: is not a valid variable

...
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1answer
73 views

how to obtain all Messages for Mathematica build-in functions?

Help says Messages[symbol] gives all the messages assigned to a particular symbol. These are called message identifiers per help: Message names always consist of ...
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2answers
742 views

Bug in Integrate?

In v. 11.1.0.0 Mathematica for Linux Integrate[Sin[Cosh[t]], {t, 0, Infinity}] returns Integrate::idiv: Integral of Sin[Cosh[t]] does not converge on {0,[...
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0answers
39 views

Using LinearLayer for NetEncode[{“Characters”}]

So, I'm trying to make a net to translate a phrase. But I'm uncertain of the use of LinearLayer for a NetEncoder for Characters and getting some error in the training process. Here a toy example of ...
1
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1answer
83 views

Why does this integral not compute?

I have the following set of equations: $$ T_{man} (\phi_{max}, p_{max}) := \frac{\phi_{max}}{p_{max}} $$ $$ \dot\phi_{ac} (T_{trig}, \phi_{max}, p_{max},t) := \begin{cases} 0 & t<T_{trig} \\ ...
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1answer
37 views

Mathematica reduces domain when simplifying function

This question was initially (wrongfully) posted on Mathematics SE. I have the following expression: $$ \sqrt{1 + 10^{\frac{rdb}{10}} + 2^{1 + \frac{rdb}{20}} 5^{\frac{rdb}{20}} \cos(\mathrm{pdiff})} ...
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0answers
54 views

Error: “Cannot set current directory” if directory name starts with tilde “~”

On MacOS, there seems to be a bug in FileNames[] when a directory starts with a tilde ("~"). Does anyone else see this behavior?: ...
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25 views

Can certain precision goals not be met by NIntegrate?

I am running into a problem with NIntegrate where PrecisionGoal cannot be met. An example is as follows: ...
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0answers
41 views

What does Eigensystem::geinsl1 mean (a solution for the generalized eigenproblem may be incorrect)?

I'm trying to solve a generalized eigenvalue problem and ran across a warning Eigensystem::geinsl1: Warning: a solution for the generalized eigenproblem may be incorrect. Here's a minimal working ...
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33 views

Correct structure in Runge-Kutta method for NDSolve

I'm kind of new in this software and in some cases I just don't know what is going wrong with my code. One of some cases is the first error that the line 22 for the Plot gives me (in the picture). I ...
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1answer
57 views

Simple pendulum animation using Lagrangian, problems with Graphics[]

I am trying to create some animations of classical mechanical systems in mathematica by using Lagrangians. I wanted to start off by doing the simple pendulum that is visually just a line, then adding ...
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1answer
44 views

Solve Unable to Solve with Inexact Coefficients [closed]

I am trying to find fixed points for a set of 3 differential equations by setting the first derivatives to zero. I plug these equations into Mathematica's Solve[] function like this: ...
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0answers
38 views

Why does Plot[D[x,x],{x,1,10}] throw error? [duplicate]

I am experiencing unexpected behavior from Plot and D, and I would like to understand why. If I try this: Plot[D[x,x],{x,1,10}]...
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20 views

RegionPlot[ParametricRegion[···]] failing to generate output with simple rescaling of axes: ParametricRegion[···] cannot be automatically discretized

I'm trying to plot the image of a subset $U\subset \mathbb R^n$ under a map $F\colon \mathbb R^n\to \mathbb R^2$. Here is a piece of code which does the job in a simple case where $F$ is the identity ...
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0answers
24 views

Graphic and value output error on jupyter notebook connected with wolfram engine

I've been trying to run the Wolfram engine in the Jupyter. I've followed this : https://github.com/WolframResearch/WolframLanguageForJupyter But I have some problems. Why isn't the graphic output ...
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0answers
71 views

Getting kernel crashes at startup and with any attempt at evaluation

I just installed Mathematica. Everything worked fine and I am able to open a notebook, but when I try to calculate simple things (e.g., calculating the sum of 2 + 2) it says "running" for a few ...
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1answer
133 views

FindRoot::lstol error

I'm getting the message: FindRoot::lstol: The line search decreased the step size to within tolerance specified by AccuracyGoal and PrecisionGoal but was unable to find a sufficient decrease in the ...
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0answers
36 views

Why do I keep getting these error messages?

I am trying to fit a parametric differential equation system to the data of the infection cases in Hungary. I keep getting the error messages: ParametricNDSolveValue::ndcf: Repeated convergence ...
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2answers
75 views

Why is FindRoot throwing a “singular Jacobian” error when function has small values?

Running the code: FindRoot[PolyLog[2, -E^-(10 + Sqrt[1 + x^2])] == 10^-30, {x, 10}] Gives me the error: ...
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38 views
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60 views
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0answers
35 views

NonlinearModelFit error: nrlnum [closed]

I use NonlinearModelFit: ...
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5answers
249 views

Overflow with NDSolve

Backslide introduced in 10.0, persisting through 12.1. I am trying to solve the following differential equation and plot the result: ...
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2answers
59 views

What does this error mean?

I am trying to solve a system of two Euler equations with a constraint. I do not know the initial conditions and I thought to use ParametricNDSolve to solve the ...
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2answers
51 views

Evaluation Control for interpolating functions

I would like to find the root of the third component of an interpolating function, here e.g. a BezierFunction p: ...
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0answers
53 views

NDSolve error for system of two non-linear equations

I'm trying to solve this system of non-linear ODE's $$\left\{y'(s) \left(x''(s) y'(s)-x'(s) y''(s)\right)=0,\mu x'(s) \left(x'(s) y''(s)-x''(s) y'(s)\right)=g \lambda \left(x'(s)^2+y'(s)^2\right)^{3/...
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0answers
32 views

Unexpected warnings issued by ListPointPlot3D when trying to make a plotting with labels (a potential bug)

I was making a very simple plotting with code below: ...
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2answers
302 views

Why does 'Transpose[list]' work but 'Map[Transpose[#]&, list]' not when attempting to transpose a 2D-array list? [closed]

I define this list: list={{100,100},{200,200}} Taking the transpose like this works as intended: Transpose[list] Taking ...
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0answers
108 views

There seem to be severe issues with Mathematica 12.1 running System Modeler models and with WSM 12.1 itself on Windows 10

I am using Wolfram Mathematica 12.1 and the Wolfram System Modeler 12.1 on a Windows 10 (64 Bit) notebook. Pretty much exactly since yesterday (2020-04-10), I am experiencing severe and previously ...
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2answers
60 views

Problem with finding this integral [closed]

l am trying to find this integral by Mathmatica, but there is some problem that Mathmatica does not give any answer, there is method to solve this integration ...
5
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2answers
235 views

How to Calculate Factorial when Overflow/Underflow occurs

I'm trying to compute this function, which sums to 1 for $0 < \alpha < 1$ and $k \rightarrow \infty$ ...
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0answers
99 views

How to solve these equations without errors?

I'm a new user of Mathematica 12. I have to plot real and imaginary solutions of two equations, eq1 and eq2, which contain the ...
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0answers
32 views

How is following two (same) calculations giving two different results? [closed]

I have the following two pieces of code which give me two different results, ...
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0answers
33 views

How to delete random elements with RandomChoice?

I have a list of prices and a list of dates, but I have 154 more prices than dates. So I want to delete random prices to match both lists, however, every time I run the block of code I get a different ...

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