================================== Top new questions this week: ==================================
[Why (and when) does pattern matching with f[__] perform MUCH more quickly than _f?]
http://mathematica.stackexchange.com/questions/130984/why-and-when-does-pattern-matching-with-f-perform-much-more-quickly-than
Consider this expression in Mathematica 10.3 (and above) on MacOS X:
expr = a b c d e f g h i j k l m n o p q r s t myG[u] myF[a, b]
Now compare the time it takes to apply the following ...
- asked by QuantumDot (22 votes), answered by WReach (17 votes)
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[Getting wrong limit with Bessel] http://mathematica.stackexchange.com/questions/130741/getting-wrong-limit-with-bessel
I computed a following limit (related to the asymptotic expansion of the sequence A000009 - number of partitions of n into distinct parts)
Expand[Limit[((( BesselI[1, (Sqrt[1/24 + n] ...
- asked by Vaclav Kotesovec (11 votes), answered by Akku14 (9 votes)
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[Join lists by observing x-value] http://mathematica.stackexchange.com/questions/130903/join-lists-by-observing-x-value
Hi everybody I have as a small test with two datasets (normally I have 100 datasets with 4100 brackets):
Dataset1={{20,1},{30, 1.3}, {40, 0.4}, {50, 0.9}} Dataset2={{30, 1.2}, {40, 1}, {50, 0.4}, ...
- asked by Jacccy (10 votes), answered by ubpdqn (13 votes)
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[How to distribute Mathematica packages as paclets?] http://mathematica.stackexchange.com/questions/131101/how-to-distribute-mathematica-packages-as-paclets
Mathematica does have a nice package manager. Packages are called paclets, and they can be managed using the functions from the PacletManager‘ context.
How can I package up my own packages as ...
- asked by Szabolcs (9 votes), answered by Szabolcs (7 votes)
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[Does function call via @ ignore HoldFirst attribute?] http://mathematica.stackexchange.com/questions/130889/does-function-call-via-ignore-holdfirst-attribute
I was trying to test whether using func[x,y] is the same as func[#,y]&@x:
SetAttributes[test, HoldFirst] test[1 + 2 - 3, 5 - 5] test[#, 5 - 5] &@(1 + 2 - 3) test[1 + 2 - 3, 0]
...
- asked by Ruslan (8 votes), answered by m_goldberg (9 votes)
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[Graph visualization: Leave gap between vertex and endpoint of edge] http://mathematica.stackexchange.com/questions/130821/graph-visualization-leave-gap-between-vertex-and-endpoint-of-edge
This is a nice graph:
g = CycleGraph[4]; Graph[g, VertexCoordinates -> {{0, 0}, {0, 1}, {1, 1}, {1, 0}}, VertexLabels -> Placed["Name", Center], VertexSize -> Medium, EdgeShapeFunction ...
- asked by cyrille.piatecki (8 votes), answered by kglr (12 votes)
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[Help finding the centre of a faint, incomplete circle?] http://mathematica.stackexchange.com/questions/130787/help-finding-the-centre-of-a-faint-incomplete-circle
so I found a program in the answers to this question that I thought was brilliant, so here it is applied to my situation: I have the image
and here’s the code:
...
- asked by Mason (8 votes)
================================== Greatest hits from previous weeks: ==================================
[How can Mathematica be used to create images like these?] http://mathematica.stackexchange.com/questions/118992/how-can-mathematica-be-used-to-create-images-like-these
Here are two examples of artistic image interpolation using just black lines:
TRIANGULATION: ANGULAR CELEBRITIES DRAWN WITH A PEN Interpolation for Triangulation-represented Digital Image
The ...
- asked by R Hall (28 votes), answered by MarcoB (29 votes)
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[How do you make a Neural Net?] http://mathematica.stackexchange.com/questions/123458/how-do-you-make-a-neural-net
In the new Mathematica release (v11), NeuralNetworks is one of the new main features. However, the documentation isn’t that clear on what function should be used in a Net.
The documentation on ...
- asked by JHM (22 votes), answered by Searke (24 votes)
================================== Can you answer these? ==================================
[Understanding the structure of an InterpolatingFunction] http://mathematica.stackexchange.com/questions/131063/understanding-the-structure-of-an-interpolatingfunction
FunctionInterpolation[x^2, {x, 0, 9}] // InputForm
returns:
InterpolatingFunction[ 0., 9., 5, 3, 0, 13, 4, 0, 0, 0, 0, Automatic, , , False, 0., 0.75, 1.5, 2.25, 3., 3.75, ...
- asked by anderstood (1 vote)
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[Is it possible to create .stp 3D model from Graphics3D?] http://mathematica.stackexchange.com/questions/130883/is-it-possible-to-create-stp-3d-model-from-graphics3d
I want to create some 3D solid model by Mathematica, and then export it into stp (step) format for further finite element or finite volume analysis in Fluent/ANSYS or Abaqus.
But so far to me, it ...
- asked by user6043040 (3 votes)
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[Time constrained loop unit] http://mathematica.stackexchange.com/questions/131159/time-constrained-loop-unit
I have a particularly difficult loop, in that it consists of two variables looping and sowing the result if a criteria is met. Overall it works for me, but some certain values for my variables take ...
- asked by Castle (2 votes)