Questions tagged [broken-code]
Use this tag only if you did your research and you still don't know why your syntactically correct code does not work.
127 questions
6
votes
3
answers
511
views
Is ContainsAny implemented incorrectly? (Version 14.2.0)
I was using ContainsAny in the Select function when I noticed that some of the relevant records in my dataset were missing. ...
0
votes
0
answers
83
views
How to tailor the input of a predefined network to match my own data?
I'd like to use the ResNet V2 on my own data, but my data is not image. Let's say my data is a list of numbers or a time sequence. Therefore, I decided to revise the ResNet V2 a little bit.
...
1
vote
0
answers
110
views
Solution of the system of Equations using iterative Varga's Algorithm?
I am working on research article with link https://www.sciencedirect.com/science/article/abs/pii/S0378475421004560
It contains dimensionless non-linear equations mentioned in article.
I am writing the ...
- 207
1
vote
1
answer
148
views
How to fix error in HAM (Homotopy Analysis Method) while running code for second order solution?
This code works well to generate first order solution but gives recursion error on generating second order solution. I think the error is causing due to computation of $f$ but don't know how to fix it....
- 207
2
votes
2
answers
121
views
Simple example of running one notebook from another [closed]
I have two notebook codes 'calculation.nb' and 'caller.nb'. The first code simply generates and prints a random number. The second code I want to use to call the first code a set number of times (say ...
- 291
1
vote
0
answers
71
views
Broken code from 14.0 to 14.1 [duplicate]
why the behavour of nlmf["ParameterTable"] has been changed from 14.0 to 14.1?
After a run of
...
1
vote
3
answers
180
views
How to only evaluate this function in the new variables after the derivative has been taken?
I have the following situation. I will first post the code and then explain what I'm trying to do and what is going wrong
...
- 643
1
vote
0
answers
75
views
Unsuccessful in parallelizing a string decomposition
I am categorizing a very large set of indexed strings that, due to size and complexity, takes long enough to desire to execute this via parallelization.
The below is a simplification, not ...
- 1,896
1
vote
2
answers
246
views
How to compute this limit in a shorter time?
Suppose we want to compute the following limit:
\begin{equation}
\lim_{\varepsilon\to 0}\lim_{r\to\infty}\frac{\lfloor 1.0101\left(\lceil 6r^2 \pi/{\varepsilon}\rceil-1\right)+1\rfloor}{ \lceil 6r^2 \...
- 81
3
votes
2
answers
352
views
Problem with illustrating pathways
This is slightly different from this and this question. We are focusing on an illustration of all pathways from a specific sample.
Suppose we have the following sample:
$$\small{\mathcal{S}=\left\{(-1....
- 81
0
votes
1
answer
133
views
Help defining all pathways of a sample from the same start-point
This is slightly different from this question. We are focusing on finding all pathways of a sample rather than partitions of equal area:
Suppose we have the following sample:
$$\small{\mathcal{S}=\...
- 81
0
votes
0
answers
106
views
Why am I getting this error? Set::setraw: Cannot assign to raw object 73
Here is my code. I tried all modifications to this code but I'm not able to resolve the problem. Can anyone tell me why am I getting this error?
...
0
votes
0
answers
146
views
SoftmaxLayer with one-hot vectors
The quantum physics problem I am looking at is a rotated qubit. The setup involves a y-rotated qubit measured in the z-basis (hence spin-up and spin-down). This scenario typically includes modeling ...
- 291
1
vote
1
answer
174
views
Most efficient way of defining the following sets for every step $n$
For each $n\in\mathbb{N}$, how do we compute sets $A_n$ and $B_n$ below:
Let $A_1=[0,2/3)$. Let $B_1=(2/3,1]$.
If $A_n$ is a union of intervals, then for each interval cut out the
middle $1/2^{n+1}$ ...
- 81
0
votes
1
answer
141
views
Generate all commutators and anti-commutators up to a certain order of a list of matrices
I am given a list of matrices. At first order I want to evaluate the commutators and anti-commutators of all pairs in the list and return a new list that contains two lists: one containing all ...
- 115
1
vote
0
answers
53
views
Define a function using symbolic constants [closed]
I want to calculate the derivative and find critical points of the following function:
$\begin{equation}
\frac{(w+w_s)(w^2+w_s^2)L^2C^3}{(wR^2C+(w^2 LC-1)^2)(w_s R^2C+(w_s^2 LC-1)^2)} \end{equation}$
...
- 111
2
votes
1
answer
151
views
Alternative Representation for Energy Levels and Energy Level Density
I need to show the energy level density around the local maximum of this double-well potential. I can do it using the following:
...
- 2,836
8
votes
1
answer
333
views
Unicode symbols not encoded properly in BarcodeImage[] in Mathematica 13.3
Bug introduced in 13.2 or 13.3 and fixed in 14.1
Trying to generate a simple QR code with ← or U+2190. I got varying results: the same in Mathematica versions 12.3 and 13.1 but very different in ...
- 287
0
votes
0
answers
145
views
Integrate function differing from RUBI's Int function in version 13.3.0
I had Mathematica Version 12.3.1 Student Edition and Integrate and RUBI's Int functions produced the same answers for my purposes with good results. I updated my version to 13.3.0 Student Edition and ...
- 9
2
votes
1
answer
249
views
Python Code to Mathematica for Classical Map of Kicked Top
I am trying to convert this Python code for Classical map of kicked top to Mathematica.
For a single trajectory, I am able to ...
- 2,836
0
votes
1
answer
272
views
Fixing a code which covers $[-k,k]\times[-k,k]$ for a given $k\in\mathbb{N}$, with smaller rectangles of equal area?
Motivation: From this post we, initially, wanted to cover a rectangle using smaller, non-overlapping rectangles with the same area: the difference between the total area of the smaller rectangles and ...
- 81
1
vote
3
answers
148
views
Labeling point coordinates in path graph using VertexLabels
Question: How do we label point coordinates in Pathgraph using VertexLabels.
Suppose we have a list of points ...
- 81
0
votes
0
answers
99
views
Part specification error
I am doing a solved exercise shared here.
However, while running the code, I encountered an error on page-8, under the Dynamics section.
with error :
I think this error is due to the absence of ...
- 2,836
3
votes
2
answers
227
views
0
votes
1
answer
128
views
5
votes
4
answers
402
views
Efficient generation of n-bit base-m Gray code with adjacent bit changes
How can I generate n-bit base-m Gray code in Mathematica, where only 1 bit changes at a time and all possibilities are covered? I have been hitting my head against a metaphorical wall for a few hours ...
- 63
3
votes
2
answers
197
views
Why does introducing value of variable for NDSolve via function not work for this problem?
I am very confused and even restarted Kernel several times (Mathematica 13.1 Windows 10). However, I fail to understand why one evaluation of NDSolve works while a ...
- 9,130
1
vote
3
answers
396
views
Creating an interactive plot that zooms into the function
Suppose we want an interactive plot for the code:
...
- 81
21
votes
4
answers
1k
views
What's wrong with this FFT-based Von Kármán vortex street simulation?
About 9 years ago, I came across this interesting website, and found the following paragraph with a broken Mathematica code sample:
When fluid passes an object, it can leave a trail of vortices called ...
- 71.6k
4
votes
1
answer
242
views
How to get rid of 0.000 and change 5.*10^n to 3*10^n on Log Plots?
Using Version 13.1.0.0 (Edit: MacOS BigSur Version 11.6, Hardware M1 chip)
In order to show some Log (or LogLog) plot features that I find annoying, here is some code:
...
- 893
1
vote
0
answers
45
views
How to attach Upvalues to CompoundExpression?
I'm trying to make something like this work:
Evaluating
someData // Query[whatever...] /* summarizeInPrettyWay /* promptToRemoveCompoundExpression ;
should produce
...
- 342
2
votes
1
answer
406
views
Stability classification code for dynamic system
I'm interested in carrying out stability analysis on discrete dynamic systems, as was done in this paper. The Author used their function ...
- 1,103
4
votes
2
answers
254
views
Adding numbers with defined precision produces incorrect result
I've tracked a bug in my code down to the problem of adding two numbers together, with the left argument having machine precision, e.g by 3` . The issue is, if ...
- 587
0
votes
0
answers
107
views
How do we define the function near the end of my post?
Suppose I have two sets $F_{1,n}$ and $F_{2,n}$ written as:
...
- 81
0
votes
0
answers
61
views
Problem with ToExpression and TexForm changing two variables multiplied together into one multi-lettered variable
I have a problem where if I multiply two variables a c in Mathematica, then copy as LaTeX (or just use the Mathematica output) to get a c, then put it in ToExpression["a c",TeXForm], I get ...
- 9
5
votes
1
answer
201
views
1
vote
1
answer
167
views
1
vote
0
answers
185
views
How to fix Mathematica crashing in the following case?
I have a problem with Mathematica when trying to glue two tables together.
The tables have the form
...
- 6,063
2
votes
1
answer
166
views
Outputting probability of rolling 6 dice N times, generating a new output each roll
I am looking to output the probability of n classic six-sided dice but I am not sure how to go about starting. This is what I have written out so far, but no way to go about accounting for n dice for ...
1
vote
0
answers
77
views
Possible bug: Wrong differentiation of ParametricFunction inside Parallelize?
In the note RootSearch problem when called from within ParallelDo
I described the problem with Ted Ersek's RootSearch package and came to the conclusion that it is ...
- 850
1
vote
0
answers
185
views
RootSearch problem when called from within ParallelDo
I have been using Ted Ersek's RootSearch package for Wolfram Mathematica for many years. The package worked great, including inside the ...
- 850
4
votes
2
answers
690
views
0
votes
0
answers
89
views
If definition of elements in table
I need to define a table where the definition of the elements differs if the indices $i$ and $j$ are equal or different. In particular I have to implement the following formula $$(K_1^{(1)}(m_1,m_2))_{...
- 115
0
votes
1
answer
119
views
Costly function inside nested Modules [closed]
The function initDataTable simply reset all data to Black first, then set the bottom right quarter to ...
- 309
0
votes
0
answers
125
views
Reduce method not working for system of equations
I have the following code which sets up a Reduce function call:
...
0
votes
1
answer
113
views
Deleting all elements in a list where the output of elements from a function is zero
I tried using DeleteCases to delete elements in r1 where g2==0 to get a defined arithmetic ...
- 81
0
votes
1
answer
98
views
2
votes
1
answer
182
views
Python to Mathematica code bug
I have an assignment in Mathematica, which I've already solved using Python and it's a bit hard to convert the code. Here's what I have done so far:
...
- 143
0
votes
0
answers
72
views
How to create 2-D or 3-D curves to simulate something like the SIR model
I don’t know what is wrong with my code. I am trying to create 2-D or 3-D curves to simulate something like the SIR model, but with tumor growth instead.
It is a proliferation-invasion/ reaction-...
2
votes
0
answers
66
views
ParallelTry Hangs on previously working code
When I run the below ParallelTry command, it just sits on it and says its being evaluated, but I cant abort it, it doesn't return what I am expecting, and I have to ...
- 587