All Questions
94,865
questions
1
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9
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Testing whether two expressions are mathematically equivalent
I have two mathematically equivalent expressions. But I can't find the code to test whether they are.
I tried this
SameQ[20 + 10 t/(t + 2), 30 - 20/(t + 2)]
The output is "False". Am I ...
- 5,585
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0
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14
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Mathematica keeps running without showing any outputs
I'm trying to execute a part of a long program. As you can see from the title that it's a question related to running issue.
Anyway I'm posting the code here, so if any one could point where the issue ...
0
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13
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How can I convert a ListContourPlot plot to a Latex contour plot?
I want to convert a Mathematica contour plot to have the appearance of being generated using LaTeX.
I am using a CSV file called unCon01new2.csv that consists of 3 columns (with no header): theta, phi,...
- 121
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27
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Select[Sin[x],FreeQ[#,x]&] returns Sin[]?
I'm writing a function that extracts all functions that depend on a given variable from expression. Mid-writing I encountered this:
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- 1,419
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0
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8
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Alternative for HatchFilling[] that doesn't alter the appearance of the plot
In Mathematica v13.0.1, I'm using the "Filling->" option in a plot like this
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- 157
1
vote
1
answer
22
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Unwanted Oscillation in Solution Occurs When Solving Poisson-Nernst-Planck Equation
This is a follow-up post for this question. I am trying to solve the Poisson-Nernst-Planck equation in the form similar to eqns 9 and 10 in this research paper.
Different than the previous question, ...
- 379
1
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0
answers
50
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Evaluating step functions
Please guys, how do I tell Mathematica to return f(a-b)= 1 if a=b and 0 otherwise?
This means that f(0)=1 and f(x)=0 for x>0.
- 31
2
votes
1
answer
29
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Non-ASCII characters are not imported correctly in MetaInformation (Solution for FLAC attached)
When importing meta information of music files, non-ASCII characters are not imported correctly. It seems that only the last byte is imported.
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- 438
2
votes
2
answers
69
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Setting position of PlotLegends affect position of PlotLabel
Plot[{Sin[x], Cos[x]}, {x, 0, 6}, ImageSize -> 400,
Frame -> True,
FrameLabel -> {"x", "y"},
PlotLabel -> "a"]
gives
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- 17.2k
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0
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37
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NDsolve Error "Cannot be used as a variable." [closed]
I've looked at the other NDsolve Error questions and none have helped.
This is my code:
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- 1
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0
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26
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Continuous Wavelet Transform Coefficients
I am trying to reconstruct the continuous wavelet transform coefficients from Mathematica without using the ContinuousWaveletTransform function. I need to create this reconstruction for my data in a ...
- 9
1
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0
answers
31
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Minimum Distance to Fly to Each European Country
Help me plan my holiday. These are all my available flights that I can get on airline points. I'm trying to work out what is the shortest distance to travel if I want to go to each every European ...
- 4,558
0
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0
answers
17
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Function LaplaceGaussian Filter -> What exactly is standardized, if this option is chosen?
I try to figure out what the option Standardized->True for function LaplacianGaussianFilter exactly means. I understand that it guarantees that the sum over the Kernel is exactly zero. But what ...
- 13
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0
answers
22
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SixJSymbol not triangular in basis transformation
The basis transformation is given by
$$\left| J^{P}, jd \right\rangle = \sum_ {S} (-1)^{J + L + Sd + Sq}\sqrt {(2 S + 1) (2 jd + 1)}\, \biggl\{\begin {array} {ccc} L & Sq & J \\ S & Sd &...
1
vote
1
answer
51
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How to project an intersection shape in a 3D set of surfaces
I need to get a intersection curve on the bottom of the 3D shape generated below:
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- 498