Top new questions this week:
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In Mathematica 12.0, I run the following code:
f[x_] = BesselI[0, x];
f'[x]
which returns BesselI[1, x] as expected. But if I enter
f[x_] = BesselI[0, 1.0 x];
f'[x]
I get
0.5 (BesselI[1, 1. x] ...
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Is there a feature in Wolfram Language that supports or enforces pure functions? WL has something that it calls "pure functions" in its documentation, but these are most emphatically not pure ...
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I frequently encounter themes where I have a set of data, then I need to gather up those identical ones. However, due to numerical error in data, GatherBy cannot be directly implemented, while Gather ...
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Suppose I have a list with mixed elements
{{{a,b},{c,d}},{{e,f},{h,i}}}
Is there a way so that I can reshuffle the elements to get the following?
...
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For the table x with three lists per row:
x={{{10, 56, 528, 6240, 97920, 1751040, 38154240, 1058365440,
31677972480, 1134275788800, 45248407142400}, {2, 14, 15, 1,
2}, {1}}, {{3, 60, 280, ...
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I want to define a function in Mathematica where I get all combinations of an expression, e.g., input:
{q,p1,p2}
Output:
{q + p1 + p2, q + p1 - p2, q - p1 + p2, -q + p1 + p2, -q - p1 + p2, -q + p1 ...
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I don’t understand this:
In[]: AtomQ[Counts[{a, c, d, b, a, c, b}]]
Out[]: True
It looks like an expression.
Does this have to do with the realization of the expression?
Dani
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Greatest hits from previous weeks:
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I'm aware that I can use (* ... *) to comment out stuff in a notebook. Many languages have a syntax for single-line comments, such as
// in C, C++, Java, C#, ...
# in shell, Python, ...
For ...
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Mathematica 9.0 looks a bit fuzzy on the retina screen, how can I increase the resolution?
Here another screenshot showing a direct comparison between the browser and Mathematica
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I have a complex expression with real positive variables only.
Mathematica Input Style:
PP = -((α (γ Cosh[y1 α] + α Sinh[y1 α])(-γ Cosh[(-L + y2) α] + α Sinh[(-L + y2) α]))
/(s (2 α γ Cosh[L α] ...
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Say I have a list x={2,4,6,8,10} and I want to find out the positions of the elements that are greater than 7.
Select[x, #>7&] gives the elements themselves, and Position[x,8] gives the ...
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Bug caused by paclet update and fixed by paclet update.
I updated to Windows 10 and have been running Mathematica fine on it for over a month. For some reason, it has just stopped working. I don't ...
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I am new to Mathematica, and using version 8.0.
I would like to calculate the 2D Fourier Transform of an Image with Mathematica and plot the magnitude and phase spectrum, as well as reconstruct the ...
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testData = Table[N@Sin[500 x], {x, 0, 100}];
ListLinePlot[Abs[Fourier[testData]], PlotRange -> Full]
Gives me
Which I do not expect because the Fourier Transform is FourierTransform[Sin[500 ...
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Can you answer these questions?
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I recently installed Wolfram Mathematica in a instance in Google Cloud using GPUs and I'm running it inside Jupyter Notebook, Python 3, using Wolfram Client library. However, big outputs, like a ...
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I'm trying to find a solution to a problem that I've been struggling with for a while. I asked a variant of the question here: Automatically load init.m without sharing CellContext, but think I've ...
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I have asked a similar question earlier, but I am still stuck at the same problem. I would like to solve an algebraic equation of the form
Tan[d*Sqrt[-k^2 + w^2*(1 + (1 - w^2)^(-1))]] ==
Sqrt[k^2 - ...
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