https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224461
Bug introduced in 12.1.1
Since I upgraded to version 12.1.1 I am unable to use > (Shift+.). When I type Shift+.
the cell that I am typing in converts to Python. What am I doing wrong?
Steps to ...
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answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 10 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224581
My attempt:
data = {{a, 3}, {b, 5}, {c, 2}}; output = Table[#[[1]], #[[2]]] & /@ data // Flatten {a, a, a, b, b, b, b, b, c, c}
asked by Too Fat Man No Neck https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=42141 11 votes
answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 18 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224500
Given
t={{7, 13, 19}, {13, 25, 37}, {19, 37, 55}, {25, 49, 73}, {31, 61, 91}, {37, 73, 109}} I want to select those lists where all three numbers are primes, so I should get {{7, 13, 19}, {37, ...
asked by user57467 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=57467 9 votes
answered by Pillsy https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=531 12 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224314
I just have a simple problem. I have a list such that,
rep = { a1 -> b1, a2 -> b2, a3 -> b3}; I want to invert replace direction such that, { b1 -> a1, b2 -> a2, b3 -> a3}
asked by Saesun Kim https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=29998 8 votes
answered by PaulCommentary https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=54458 8 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224269
I have a list of coordinates that make a near-parabolic graph, which I managed to fit and calculate the curvature. However, the curvature only outputs a equation. Is there any way to calculate the ...
asked by Char https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=66040 8 votes
answered by yarchik https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9469 11 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224276
There is a known expansion for the Dirac delta function in the interval \( (-1, 1) \) in terms of the Legendre polynomials as
$$\delta(x) = \sum_{k = 0}^{\infty} (-1)^k \frac{(4k + 1) (2k)!}{2^{2k + 1}
asked by Novice https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72595 7 votes
answered by yarchik https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9469 11 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224511
I am trying to find out what methods/options are available for NDEigensystem and
descriptions of their use. Perusing the help, online Q&As, Mathematica’s in-line autofill, etc.,
I’ve found a few, ...
asked by Eli Lansey https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9 6 votes
answered by user21 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=18437 5 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=35653
In this example, how can I put the legend inside the graph? Currently, when I save the graph, only the graph is saved, not the legend.
Expr1 = -2 p + 1 Expr2 = 2 p - 1 Expr3 = p - 1/2 Plot[{Expr1, ...
asked by Mika Ike https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=6543 41 votes
answered by C. E. https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=731 35 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=3433
I am using this code to plot a graph, and I am trying to make the font of the legend bigger.
<<PlotLegends` ListLogLogPlot[{Sort[moby]}, PlotRange -> Full, Joined -> True,
asked by Julia https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=525 20 votes
answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 25 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=26268
This week, the market people from my work wanted to put QR codes in shopping cart handles, but when they tested it, the QR code did not work. I noted that the cylindrical curvature (even small) ...
asked by Murta https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=2266 194 votes
answered by halirutan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=187 190 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=57763
When I solve the aforementioned equation for \(W\) or \(A\) on Mathematica I get a long and ugly equation in return, namely one of the solutions for \(W\) is: (attempt to read at your own health)
asked by J.D’Almbert https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=19257 8 votes
answered by Alexei Boulbitch https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=788 14 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=627
I would like to plot those two datasets on top of each other. But they have very different range on the \(y\) axis. How can I have two different axis?
I found the following on the help menu but quite ...
asked by 500 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=172 145 votes
answered by ArgentoSapiens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92 149 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=18393
As you may already know, Mathematica is a wonderful piece of software. However, it has a few characteristics that tend to confuse new (and sometimes not-so-new) users. That can be clearly seen from ...
asked by Dr. belisarius https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=193 462 votes
answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 279 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=434
How can I express a trigonometric equation / identity in terms of a given trigonometric function?
using following trigonometric identities
Sin[x]^2+Cos[x]^2==1 Sin[x]/Cos[x]==Tan[x]
asked by Prashant Bhate https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=99 30 votes
answered by Simon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=34 37 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224477
So I have a DE which has no analytical solution and thus solved using NDSolve, involving some parameters like this:
solution=NDSolve[{b/z[t]^4+a z'[t]+z''[t]==0,z[0]==3,z'[0]==3},z,{t,0,5}]
I was ...
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https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224402
Given two matrices \(A\) and \(B\), their Binomial expansion is, in general, given by (see this page) \((A+B)^n = \sum \limits _{k=0, k=n[2]}^n \Bigg ( \sum \limits _{r=0}^k \binom {k}{r} A^r B^{k-r} \Bigg )\) ...
asked by Rob https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=66809 1 vote
answered by flinty https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72682 0 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224258
I plan to use a ZWO ASI planetary camera (USB connection) for astronomical photography and would like to control the image acquisition using Mathematica. The issue is that although I have installed ...
asked by Dave Baker https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=73406 1 vote