https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223907
Given a list:
lis = {37.21, 37.21, 37.2, 44, 44, 44, 101, 101} What is a simple way to extract the second largest elements? In[]:= someFunction[lis] Out[]= {44, 44, 44}
asked by Conor Cosnett https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36681 14 votes
answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 16 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224062
I am going to buy a new powerful desktop that I will use to run finite element simulations using AceFEM. I found out that the new AMD Ryzen 9 3950X obtained more points in the CPU Passmark benchmark ...
asked by KratosMath https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53039 8 votes
answered by marko https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=48938 8 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223978
I found something interesting on this page (Generic contour smoothing with shading) that could help me improve my images. Unfortunately, they can only be used with graphics generated by the software ...
asked by LCarvalho https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=37895 8 votes
answered by flinty https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72682 9 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223899
I’m running Mathematica on a machine wtih 48 cores and 96 threads. I want to limit the
number of threads the computation can have access to. If I give LaunchKernels[1] it
correctly launches a single ...
asked by Paolo Pani https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=73287 8 votes
answered by Mr.Wizard https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=121 9 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223943
I have the following convex hull.
P0={0,0,0}; P1={1,0,0}; P2={0,1,0}; P3={0,0,1}; ConvexHullMesh[{P0,P1,P2,P3}]
Now I want the region algebraically as equality of the convex hull generated, in ...
asked by Sumit Banik https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=71940 7 votes
answered by kglr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=125 9 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223817
We want to find the zeros of a multi-dimensional function
f[x_, y_] = {x + 1/4 (-Cos[x] + Sin[y]), x - y - Sin[y]/4}
To find the zeros, we can initialize and show the iterates using FindRoot
asked by Moo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36141 7 votes
answered by flinty https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72682 7 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224140
In Wolfram Language, Import["file.wl"] can import external wolfram package, Is it reversible? Can I unimport some packages? In other means Unset all the Function, Variable which is Set when ...
asked by Audra Jacot https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=67051 6 votes
answered by Szabolcs https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12 7 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=87388
I need to change the position of my axes labels such that the y-axis label is in the middle and parallel to the y-axis. I’d also like the x-axis label to be in the middle of the x-axis rather than ...
asked by John_dydx https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=7849 15 votes
answered by Virgil https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=27697 16 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=8586
I am trying to use the Export command to convert a list of plots into a *.gif file, and the command runs and executes well, but I can’t find the file! Where is it supposed to go? Did it even work?
asked by Patrick Da Silva https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1785 37 votes
answered by Vitaliy Kaurov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=13 51 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=66273
I’m trying to expedite some quantum mechanical calculations (expectation values etc.) by running them through Mathematica. When I say, for example,
u[x_] := Sqrt[2/L] * Sin[Pi * n * x / L]
and then ...
asked by Matthew Brunetti https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=22304 36 votes
answered by SquareOne https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=19960 22 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=2456
Struggling often with Trigonometry I would like to have some code to generate this Unit Circle Trigonometry. Would be of great help when I need to transform some data :
asked by 500 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=172 18 votes
answered by Mark McClure https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36 32 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=3561
In the plot below I would like to add two vertical lines at \(x = \frac {\pi }{15} \pm \frac {1}{20}\). How can I do that?
f[x_] := (x^2 z)/((x^2 - y^2)^2 + 4 q^2 x^2) /. {y -> /15, z -> 1, q -> ...
asked by sjdh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=515 54 votes
answered by Ajasja https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=745 75 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=64003
I have a list:
data = {4, 5, 7, 8, 9, 5, 3, 2, 1, 2, 13, 12}; I want to take those elements in the list which are located at equal distances, say, every third element, getting the list {7, 5, 1, ...
asked by Suro https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=20003 34 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=20100
I’m new to Mathematica, and I’m finding it difficult to plot an ellipse. I tried using
Plot[(x/5)^2 + (y/3)^2 == 1, {x, -5, 5}, {y, -3, 3}]
but I’m getting some errors. Is there something wrong ...
asked by Sriram https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=6075 17 votes
answered by Jens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=245 29 votes
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223991
I’m trying to export a large sparse matrix of dimension 1164960 by 1164960 with 17815680 elements as an .mtx file so I can import it into Python. I first the run the following code successfully.
asked by Daniel Berkowitz https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=27536 1 vote
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=223879
I have run into a Mathematica object I’ve never seen before and Googling those reveals nothing. I’m talking about VariableReplacementDump and TranscendentalDump. Here’s how I got these:
asked by Lokdal https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=23117 1 vote
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=224072
Among other series I’ve been working on, I was asked to find whether \[\sum _n 1-\cos (\frac {\pi }{n})\] converged, and Mathematica’s output to
SumConvergence[1 - Cos[Pi/n], n] simply was repeating the ...
asked by Hal https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=73083 1 vote