Questions seeking help understanding error messages and fixing errors.

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0
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0answers
26 views

“Tag list in … is protected error” Small question [duplicate]

I am trying to do something very simple. I just would like to construct a translation matrix where I can chose my translation parameters: ...
0
votes
1answer
33 views

Is it possible to get same answer from NonlinearModelFit with and without errors on data? - How to insert errors in NonlinearModelFit?

I want to use NonlinearModelFit with the following data. I tried it firstly without inserting any error bar. ...
0
votes
1answer
43 views

How to find a maximum?

FindMaximum[1/2*Abs[(o - u)^2/(1 + o^2 + u^2 + 2*o*u + 2*o^2*u^2)]^2, {o, u}] doesn't work. It gave me that : FindMaximum::fmgz: Encountered a gradient that ...
12
votes
1answer
119 views

Bug with Compile and Log2?

It seems that Log2 in Compile gives numerical errors (CompiledFunction::cfn) if the input is ...
0
votes
1answer
67 views
0
votes
0answers
35 views

Error with Wolfram|Alpha query from Mathematica?

I upgraded to version 10.4 of mathematica, then I run a query with WolframAlpha inside Mathematica but there comes a error message. I do not know what happened. It send me this: ...
1
vote
1answer
69 views
1
vote
0answers
128 views

What is the symbol FE`None for?

I have run into the symbol FE`None multiple times. What is this symbol, and what is it designed to indicate? All I could find is that FE indicates the front-end, but it's unfortunately a very ...
1
vote
0answers
30 views

Failing to Load Cloud-Related Functions

I am running Mathematica 10.2 (Student Edition), and am encountering an issue with Cloud-related functions. Specifically, when I evaluate anything like CloudConnect or ...
1
vote
0answers
27 views

Error Processing CityData

I try get the populations of all cities by this common used line pop0 = Map[{#, CityData[#, "Population"]} &, CityData[All]]; But it gives me this error ...
1
vote
1answer
71 views

getting a following error,large data points,desired output-best fit to expt. data sets

I am trying to carry out list operation but running into a following error I have large data sets(more than 0.2 million data points) and desired output will be a best fit (numerical data points ) to ...
0
votes
0answers
14 views

Error witih DSolve [duplicate]

I am trying to solve these differential equations: ...
-5
votes
1answer
78 views

Can't get plot using the Evaluate function [closed]

I am trying to plot a series of five curves using a loglogplot command and then labeling the curves with a value. This is the program I am trying to run. ...
1
vote
0answers
37 views

Changing system shell

What I'd like to do is to have a Mathematica script use some user-defined bash functions before scheduling some calculations on the results generated by by these functions. Since I have them written ...
3
votes
5answers
130 views

How to get a list of indices at which errors occur during iteration

I have been looking at some of the questions regarding error handling but i think my problem is unique. I am running a Do-loop. I get errors only for certain values of the loop variable due to the ...
4
votes
2answers
141 views

How to calculate this probability?

Here I want to find the probability $p$ which is given by $$p=\int_0^{r_d}\mathcal{L}_I(\beta r^{\alpha}|r)f_R(r)dr$$ with $r_d=1$ and $0 \le r\le r_d$. I want to calulate the probability for ...
0
votes
1answer
82 views

Getting errors from NIntegrate when I try to plot my function

I am trying to 3D plot the function ϕ[σ, λ], but Mathematica keeps refusing to plot for the reason that the output involves complex numbers, even though by ...
1
vote
0answers
26 views

Error with Parallel Calculation on Large Multiple Sums [closed]

I am attempting to complete the following quadruple sum: ...
0
votes
1answer
51 views

What is required to remove a Part::pspec error? (Ver.9)

I asked a similar question here the other day, but I could not make myself clear. Then I ask once again. I wanted to visualize a noise model on CCD sensors by Mathematica (Mine is ver.9). The ...
4
votes
2answers
144 views

Solution of a System of Equations Using `Solve`

Part 1 I am trying to solve a simple system of equations as follows Solve[{A x^B == f, A y^B == g}, {A, B}] But I just get the error Solve::nsmet: This ...
0
votes
0answers
30 views

`{Protected, ReadProtected}` System symbols give “Set::write: ”Tag * in *[v_] is Protected" on first try

Run Quit, then Unprotect@AbelianGroup; AbelianGroup[v_] = 0; Protect@AbelianGroup; where instead of ...
0
votes
1answer
42 views

Implementing four-fermions operators on FeynRules and FeynArts

I am trying to implement operators of the form $$ \bar{q}_L \gamma^\mu T^A q_L \bar{q}_L \gamma_\mu T^A q_L $$ where T^A are the SU(3) generators and $q_L$ is the Electroweak SU(2) doublet. I use ...
1
vote
1answer
118 views

What is the source of error in the following fitting procedure in Mathematica 8.0? [closed]

I am trying to fit the following data with a user-defined model. A priori, we know that this model is supposed to be the best fit for the given data. But, I do not know why I am receiving many error ...
0
votes
2answers
54 views

Quartic function from data [closed]

I am studying something about interpolation. I have a function that is a power x function (f[x_]:=17000 x^-1.85). From this function I got a list with coordinates ...
1
vote
0answers
54 views

Why does DeleteDuplicatesBy fail?

This is a pretty straightforward code. I just want to delete duplicates based on the final entry in each row. I have evaluated very similar numbers with no problem. ...
1
vote
1answer
185 views

My code uses `ClebschGordan` but `Mathematica` is using `ThreeJSymbol`

I'm using a function that calculate CG coefficients with the function ClebschGordan but instead, I've got the following error because Mathematica is using ...
0
votes
1answer
122 views

Solving Partial Differential Equations using NDSolve

I'm trying to solve the following partial differential equation: With the boundary conditions: I could use another way to resolve this, like the finite volume method, but after I solve the ...
0
votes
0answers
109 views
1
vote
1answer
53 views

CUDATranspose bad result

A fairly simple experiment, I am trasponsing an identitiy (3x3) matrix, and I got a weird result. I tried also CUDADot and works as expected. The code I used: ...
1
vote
2answers
42 views

Convergence Problem in NIntegrate

I need to evaluate the following integral numerically for different values of a: ...
5
votes
1answer
39 views

Strange problem with Derivative and BoxForm`MakeDerivativeBoxes

All of the following three lines should produce the same output, but the third variant produces an error on output. ...
2
votes
0answers
38 views

Protected Variable Error with Workbench 3.0

I have Wolfram Workbench 3.0, build 78, with Mathematica 10.4 as the front end. I am using Windows 10. I am trying to run a simple test source code test.m: ...
5
votes
1answer
205 views

Is there an alternate way to calculate beyond the memory limit of the home edition?

I bought the Home Edition of Mathematica online 0.5 G of memory and costs \$150 per year. When I calculated the median of outputs from $[0,1]$ with an interval of $.000001$ I ended up with the ...
0
votes
2answers
56 views

Part::pspec error occured

I wanted to simulate a noise model on CCD sensors, so I did as below: ...
0
votes
1answer
65 views

Error message when running NDSolveValue

I am trying to solve a set of differential equations but keep getting an error. See message below "NDSolveValue::ndnum: Encountered non-numerical value for a derivative at t=0" The system that I ...
2
votes
0answers
83 views

ListPolarPlot goes crazy when PolarAxes->True

Bug introduced in 9.0 and fixed in 9.0.1 I think I am experiencing the same/similar problems as this user. Mathematica Version: 9.0 for Mac OS X x86 (64-bit) (November 20, 2012) Computer: Mac OS ...
1
vote
0answers
54 views

Any possible to save a 'partial' result of NDSolve when it was aborted due to insufficient memory?

I have run a NDSolve code for an extremely long time. Unfortunately, it was aborted because there was insufficient memory available to complete the computation. At ...
3
votes
1answer
57 views

Why does the Part::partw error appear when using DSolve?

I solved the following ordinary differential equation for $F(x)$ using DSolve in Mathematica $$ \begin{align} \begin{split} & A x^2 (x^2 + 1) F'''(x) - \left(3 A (b - 2) x^3 + a x^2 +A (b - 2)x +...
1
vote
0answers
41 views

Using Replacement Rule on Part of List? [closed]

Why can't I use a replacement rule to replace a variable name standing in for the index of a list? For example: myList={1,2,3,4,5} myList[[index]]/.index->3 ...
3
votes
0answers
33 views

EntityValue returns CharacterEncodingError

Whenever I try to use natural language-input, or even just call the EntityValue function, like in a Documentation example: ...
1
vote
1answer
36 views

Plotting x value and error bar in y from a data file

Here are some of the points where first column is the values on x axis and the other two values are lower and upper limits for the error bars in y. ...
0
votes
0answers
25 views

Tag list is Protected error [duplicate]

I have the code permutationBasis[mix_] := Table[change[B, mix], {B, basisHomology}] where mix should be an input of the form {5,4,1,2,3}. However this gives me ...
1
vote
1answer
52 views

nonatomic expression expected when trying to sum of the integrals of two functions

newbie to MMA. After computing the following two integrals: ...
1
vote
0answers
64 views

Differential equation: NDSolve::berr

I'm trying to solve the following differential equation. I'm able to obtain a solution, and that solution looks more or less as how the theory predict it should be. ...
4
votes
1answer
123 views

What is wrong with my code so it neither produces a correct plot nor an error message?

I am trying to define some initial functions and then using them to define my secondary functions and then plot the secondary functions. I am supposed to get two curves with a finite width ...
3
votes
2answers
130 views
2
votes
1answer
73 views

How to plot a function whose constant parameters have associated uncertainties in Mathematica 8.0?

Let's assume I want to plot the function $f(x)=a + bx+ cx^{2}$, where experimentally known values of parameters $a, b$ and, $c$ are as follows: $a=1.01 \pm 0.18$ $b=0.92 \pm 0.11$ $c=2.2 \pm 0.2$ ...
2
votes
2answers
45 views

NIntegrate::inumri error with continuous function

I'm trying to calculate the finite part of a divergent integral numerically, but as I bring the regulator down to $0$, Mathematica starts throwing an error. ...
3
votes
0answers
43 views

Why does Kernels[] produce this error?

Most of times, on my PC, when Kernel[] is launched for the first time, produces this error: Executed again returns {}. Is ...