================================== Top new questions this week: ==================================
[Reduce Code Length] https://mathematica.stackexchange.com/questions/152003/reduce-code-length
I have the following that works good, and computes in one shot,but the code is so long. Can someone please help me to reduce the size of this?
...
- asked by Bill W. (9 votes), answered by Ali Hashmi (7 votes)
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[Best way to handle nested Maps?] https://mathematica.stackexchange.com/questions/151742/best-way-to-handle-nested-maps
I often find myself working with lists of lists of data, gathering data, performing computations, and producing a variety of different sorts of output. Intuitively, it seems like this should be done ...
- asked by Michael Stern (9 votes), answered by eldo (6 votes)
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[Color gradient varying in a path] https://mathematica.stackexchange.com/questions/151980/color-gradient-varying-in-a-path
The code below is to create something like a logo. I want to apply a color gradient over the polygons of the pattern, but they vary along the path. The image that I want to approach is this:
ang = ...
- asked by LCarvalho (8 votes), answered by KennyColnago (9 votes)
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[Offset Partition with only one remainder element] https://mathematica.stackexchange.com/questions/152152/offset-partition-with-only-one-remainder-element
I would like to use a combination of options of Partition in a way that I can’t seem to find in the documentation.
Given example input {a,b,c,d,e,f,g}, I would like output ...
- asked by George Moore (7 votes), answered by kglr (4 votes)
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[Slot # corresponding to subset of a list in select]
https://mathematica.stackexchange.com/questions/152082/slot-corresponding-to-subset-of-a-list-in-select
Is it possible to use # in the select function preserving the structure of the list? Here an example of what I mean. Let's say I want to select all the pairs where the first element is 1: data1 = ...
- asked by Fraccalo (7 votes), answered by kglr (7 votes)
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[Any faster approach than Outer for my computation] https://mathematica.stackexchange.com/questions/151892/any-faster-approach-than-outer-for-my-computation
Outer is slowing down considerably when the first argument is Abs[#1 - #2]/Max[#1, #2]& Outer[List, Range[5000], Range[5000]]; // AbsoluteTiming (* {0.120091, Null} *) Outer[Abs[#1 - ...
- asked by Ali Hashmi (6 votes), answered by nikie (9 votes)
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[How to generate password] https://mathematica.stackexchange.com/questions/151864/how-to-generate-password
I would like to generate a random password of a defined length which can easily be typed in with a standard keyboard.
As a start I tried the following:
SeedRandom["pass"]; ...
- asked by mrz (6 votes), answered by yohbs (11 votes)
================================== Greatest hits from previous weeks: ==================================
[Why should I avoid the For loop in Mathematica?] https://mathematica.stackexchange.com/questions/134609/why-should-i-avoid-the-for-loop-in-mathematica
Some people advise against the use of For loops in Mathematica. Why? Should I heed this advice? What is wrong with For? What should I use instead?
- asked by Szabolcs (52 votes), answered by Szabolcs (62 votes)
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[Why round to even integers?] https://mathematica.stackexchange.com/questions/2116/why-round-to-even-integers
According to the Mathematica help:
Round rounds numbers of the form x.5 toward the nearest even integer.
For example:
Round[{0.5, 1.5, 2.5, 3.5, 4.5}] gives {0, 2, 2, 4, 4}
- asked by wxffles (64 votes), answered by Per Alexandersson (42 votes)
================================== Can you answer these? ==================================
[How can I exclude factors containing a certain symbol form matching my pattern] https://mathematica.stackexchange.com/questions/151971/how-can-i-exclude-factors-containing-a-certain-symbol-form-matching-my-pattern
Ok, I give up. I can’t figure how to tell Mathematica to do replacement using a pattern except for some special case. Easier to explain with small example.
I want to change pattern Exp[any_. c] to c ...
- asked by Nasser (3 votes)
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[Graphics3D with explicit ViewAngle inside Manipulate disappears for a moment when starting rotation] https://mathematica.stackexchange.com/questions/151978/graphics3d-with-explicit-viewangle-inside-manipulate-disappears-for-a-moment-whe
Given the following:
Manipulate[ ContourPlot3D[ x^4 + y^4 + z^4 - (x^2 + y^2 + z^2)^2 + 3 (x^2 + y^2 + z^2) == 3 c, {x, -3, 3}, {y, -3, 3}, {z, -3, 3}, ...
- asked by Mark (1 vote)
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[MTensor from existing memory?] https://mathematica.stackexchange.com/questions/151780/mtensor-from-existing-memory
I am wondering whether it’s possible to return a tensor from my C++ code using LibraryLink without copying the memory (because it’s large). So, instead of
libData->MTensor_new(..., &T0); ...
- asked by mrupp (2 votes)