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1 vote
2 answers
35 views

I would like to include terms that factorize a sum within the sum. For instance, from k Sum[Subscript[x, i], {i, 1, L}] getting ...
T.A.'s user avatar
  • 11
2 votes
2 answers
52 views

I'm producing a lot of data which I want to save to a file in tab-separated format: $\begin{matrix}x_1&&f(x_1)\\x_2&&f(x_2)\\x_3&&f(x_3)\\&\ldots\end{matrix}$ I'd like ...
0 votes
0 answers
75 views

I've stumbled across what seems to be a weird interaction of the NMinimize function. I'm minimising the function -Log[Sin[2x]] + a Cos[x]^2 for 0ドル < x < \pi/2$...
1 vote
0 answers
55 views

I use this code p1 = Graphics[{PointSize[0.05], Red, Point[{{4, 0}, {7, 0}}]}]; p2 = Plot[Sin[x], {x, 0, 10}, PlotRange -> {-2, 2}]; Show[{p1, p2}] which gives ...
2 votes
1 answer
167 views
6 votes
1 answer
176 views

Running FeatureSpacePlot[mols] gives me an interesting plot and I would like to understand the method. Does anyone know or can point me to a reference page on how ...
3 votes
1 answer
143 views

The documentation clearly states that for the symmetrical normal distribution RarerProbability[distribution,x] gives the two-sided p-value for x. Using direct ...
2 votes
1 answer
105 views

When I ask Mathematica (version 14.1) to do the following symbolic integration: ...
1 vote
0 answers
50 views

I am trying to add a title with a background color to my plot. Currently, using Framed inside PlotLabel only creates a box around the text itself. I want the background box of the title to: Span the ...
1 vote
0 answers
56 views

I would love to have a ToRules that can act on say Reduce output that preserves conditions that cannot be written as rules. Something that creates something like ...
0 votes
0 answers
57 views

The heat conduction equation of solar cells can't be solved. NDSolveValue::ndnum: Encountered non-numerical value for a derivative at x == 0. ...
3 votes
1 answer
93 views

I want to produce an SVG map by Mathematica that preserves tooltips that are in Mathematica so that they are also in the SVG. The problem is that the tooltips do not export. Here is an example: That ...
2 votes
2 answers
121 views

Example The notation $a\Downarrow_bc$ can mean something like "the program $a$ results in $c$ when executed according to the semantics of $b$". In Mathematica, I input this as ...
8 votes
0 answers
145 views

I think there might be an issue with CollinearPoints at least in the 14.2 Windows version I'm using. The issue arises where there are duplicate points and mixed ...
3 votes
2 answers
120 views

Trying to replace some of the expressions wrapped by Hold as below to get $\frac{k d\theta }{dt},ドル ReplaceAll does not replacing ...
Soon's user avatar
  • 1,464
3 votes
2 answers
285 views

I would like to have an idea what kind of curbe is being formed from the intersection of the plane $x+y+z=9$ with the surface $\sqrt{16-x^2}+\sqrt{25-y^2}+\sqrt{36-z^2}=12$ under the restriction $x,y,...
-1 votes
0 answers
109 views

The heat conduction equation of solar cells cann't be solved. NDSolveValue::ndnum: Encountered non-numerical value for a derivative at x == 0.`. NDSolveValue::femcnsd: The PDE coefficient -((2.4810^-...
0 votes
0 answers
32 views

StreamPlot doesn't plot symmetrically e.g. StreamPlot[{x, y}, {x, -1, 1}, {y, -1, 1}]. How to make it symmetric about x=0?
feynman's user avatar
  • 451
1 vote
1 answer
99 views

How to let the partial derivative notation \[PartialD] in an input cell have no built-in meaning, like \[DifferentialD] ? When ...
Soon's user avatar
  • 1,464
3 votes
1 answer
160 views

I am trying to solve an iterative matrix ODE of the form $f_k'(x)=T.f_k(x)+B(x)*S.f_{k-1}(x),ドル where f is an $n$ dimension column, T and S are $n \times n$ matrices, and $B(x)$ is a function. The ...
0 votes
0 answers
69 views

I have an ODE of the form: y^{(4)}[x]==F[y^{(3)}[x],y''[x],y'[x],y[x]] for some complicated (but explicit) $F$ -- the exact form isn't really relevant to the ...
2 votes
2 answers
188 views

This may be a silly question, and if it is, I'm willing to withdraw it. I have a list of lists myInitialList. I wish to write a function to transform ...
5 votes
0 answers
68 views

There's an option in the options inspector to display a timestamp upon evaluation of a cell: Notebook Options → Evaluation Options → EvaluationCompletionAction → AddTimeStamp. That causes the date and ...
Rain's user avatar
  • 758
6 votes
1 answer
217 views

In V 14.3 Quit[] ode=2*y[x]*D[y[x],{x,2}]==1+D[y[x],x]^2; DSolve[ode,y[x],x,IncludeSingularSolutions->True] Gives Is it valid for DSolve to return ...
4 votes
1 answer
143 views

Say I have a list containing some expressions, for instance ...
3 votes
0 answers
132 views

I want to have multiple timings inside a compiled code. However, it turns our that AbsoluteTime[] does not work: ...
17 votes
1 answer
601 views

This is more of a community question than an answerable problem. If it's out of bounds I'll be happy to withdraw it. But, one year out, I'm curious as to other WL users' experiences with the ...
1 vote
1 answer
119 views

$LLL$ is implemented in Wolfram Mathematica as $\mathsf{LatticeReduce}$ command. If we want to reduce a rank $k\leq n$ lattice in $\mathbb Z^n$ where the generator matrix of the lattice has integral ...

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