Newest Questions
96,946 questions
1
vote
1
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Running Mathematica Remotely on a Linux Server
This question has most likely been asked several times in the past, although I could not find the answer with a search.
I am logging in remotely via Putty to a linux server that has Mathematica ...
4
votes
1
answer
44
views
Optimization with vector constraint function
I would like to minimize a vector function subject to a vector constraint function. Unlike previous posts (Constrained FindMaximum with array valued function and Constrained optimization with a ...
- 428
2
votes
2
answers
73
views
Data conversion
I have data in a text file in the form of:
{5,15,23,28,36}->{2,8,10,14,27}
I would like to convert it to this form
...
- 373
0
votes
0
answers
47
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Fast partial shuffling?
I need a version of partial shuffling of a 2D table of reals tab that works very efficiently for large arrays and, being repeated $N\gg 1$ times, becomes analogous ...
- 5,901
6
votes
3
answers
78
views
List of available model strings for LLMEvaluator?
How to get a list of OpenAI models available for use in LLMEvaluator?
For example the list of model names like "gpt-4o", "gpt-4-vision-preview", "gpt-3.5-turbo" that you ...
- 143
0
votes
0
answers
40
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Mathematica Online: real integrand gives complex results [duplicate]
I am using Mathematica online to calculate the below integral:
$$\int_0^1(y(x)-p(x))^2dx$$
where $y(x)=(1-x)\sec\left(\frac{\pi}{2}x\right)$ and $p(x)=1-ax$ for $a\in\mathbb{R}$.
However the result is ...
- 1
3
votes
4
answers
246
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Why cannot "a" be 0 in this pattern matching?
Why does the pattern matching not work if k is 0 (either explicitly or implicitly)? Is there any method to make it work?
...
- 103
0
votes
5
answers
117
views
Any More Flexible Pattern Matching?
I tried to define a simple function with pattern matching:
F[(n_ - k)*T[n_ + 1 - k]/m_] := k*n/m
But when I run ...
- 103
3
votes
1
answer
94
views
Mathematica camera resolution
For some reason, Mathematica captures images in much worse resolution than available.
One of camera properties listed in Mathematica is
...
- 31
2
votes
1
answer
64
views
Find the average of the numerical data for each column in the list
I have a list of rows in the database that contain numerical and non-numerical data, such as:
...
- 1,185
0
votes
1
answer
49
views
KroneckerDelta products in nested sums incorrectly evaluated?
I'm experiencing problems with Mathematica (apparently incorrectly?) evaluating expressions, that are then not equal to their source expression, as evidenced by the fact that the original evaluated ...
- 83
6
votes
1
answer
336
views
Kronecker product isn't behaving as I'm familiar with
It's my understanding that if I take $\vec{x}=\begin{pmatrix}
1\\
0
\end{pmatrix}$
and then do $\vec{x}\otimes\vec{x}$ I should be getting$\begin{pmatrix}
1\\
0\\
0\\0
\end{pmatrix}$
but when I run <...
- 470
2
votes
1
answer
55
views
Fast partitioning in the given case
Consider the following code:
tab = RandomReal[{0, 1}, {3*10^7, 2}];
lenblock = 10^3;
len = Length[tab];
tabfinal = Partition[tab, lenblock]; // AbsoluteTiming
Here,...
- 5,901
1
vote
0
answers
65
views
Looking for implementation details of CylindricalDecomposition, GenericCylindricalDecomposition, SemialgebraicComponentInstances
Looking for implementation details of CylindricalDecomposition, GenericCylindricalDecomposition, ...
- 450
8
votes
1
answer
215
views
Generating natural structures with Mathematica
I am interested in Fomes Fomentarius or "Tinder Polypore" mushroom patterns
(original photo, diagrams of Voronoi and Delaunay):
At first it seems something simple, like a sunflower seed ...
- 2,282