================================== Top new questions this week: ==================================
[A bug in Integrate] http://mathematica.stackexchange.com/questions/84089/a-bug-in-integrate
Integrate[(1 + 16 Tan[2 x - y]^2)/(1 + 4 Tan[2 x - y]^2), {x, 0, 2 Pi}]
Mathematica (wrong) output is (tested under versions 8 and 10.0, took 1 minute of CPU time)
10 Pi
The correct value of this ...
- asked by Vaclav Kotesovec (17 votes), answered by Histograms (11 votes)
—————————-
[What is the FrontEnd?] http://mathematica.stackexchange.com/questions/84173/what-is-the-frontend
Can anyone sort out what the Front-End is, how it is structured and what its relationship to the Kernel is. The FrontEnd is mentioned quite often but elusively avoids to be caught and clearly defined. ...
- asked by MathLind (15 votes), answered by Mr.Wizard (12 votes)
—————————-
[Regime Change Stochastic Process] http://mathematica.stackexchange.com/questions/84054/regime-change-stochastic-process
I would like to simulate an Ito process in which the drift and diffusion terms change after hitting a boundary for the first time.
For example, a Geometric Brownian Motion X which has 0 drift and ...
- asked by Shffl (12 votes), answered by Sjoerd C. de Vries (9 votes)
—————————-
[How to speed up Colorize] http://mathematica.stackexchange.com/questions/83967/how-to-speed-up-colorize
I have a list of about 500 images similar to the following:
A = Import["http://i.stack.imgur.com/1bV4O.png"] AbsoluteTiming[Colorize[A, ColorFunction -> "AvocadoColors"]]
Gives 0.6 ...
- asked by DarrenM (11 votes), answered by bill s (7 votes)
—————————-
[Does Mathematica have an equivalent of Python’s float.as_integer_ratio?]
http://mathematica.stackexchange.com/questions/84234/does-mathematica-have-an-equivalent-of-pythons-float-as-integer-ratio
The Python programming language has a float.as_integer_ratio(x) function which exactly converts an IEEE 754 floating-point number into a numerator/denominator pair of integers. For example:
...
- asked by David Zhang (10 votes), answered by Guess who it is. (15 votes)
—————————-
[Does Mathematica have an equivalent of C’s nextafter?]http://mathematica.stackexchange.com/questions/84237/does-mathematica-have-an-equivalent-of-cs-nextafter
In C (and many other programming languages), there is a function
double nextafter(double x, double y)
which takes two (IEEE 754) floating-point numbers and returns the next representable ...
- asked by David Zhang (9 votes), answered by Michael E2 (5 votes)
—————————-
[How can I make FilledCurve smoother?]http://mathematica.stackexchange.com/questions/84247/how-can-i-make-filledcurve-smoother
In How can I generate and randomly assign color to annular sectors? J.M. showed an interesting way to create a sector graphic using FilledCurve. Unfortunately it was marred by an inferior rendering ...
- asked by Mr.Wizard (9 votes), answered by Mr.Wizard (9 votes)
================================== Greatest hits from previous weeks: ==================================
[Alternatives to Mathematica]http://mathematica.stackexchange.com/questions/28162/alternatives-to-mathematica
Inspired by the recent question Alternatives to LaTeX (currently 58 upvotes) on http://tex.stackexchange.com/:
Are there any paid-for or open source alternatives to Mathematica which produce equal or ...
- asked by akk (28 votes), answered by Sumit (17 votes)
—————————-
[How do I draw a pair of buttocks?]http://mathematica.stackexchange.com/questions/66538/how-do-i-draw-a-pair-of-buttocks
I’m trying to develop a function which 3D plot would have a buttocks like shape.
Several days of searching the web and a dozen my of own attempts to solve the issue have brought nothing but two ...
- asked by Simpleton Jack (221 votes), answered by mikuszefski (340 votes)
================================== Can you answer these? ==================================
[Simplification with absolute value]http://mathematica.stackexchange.com/questions/83933/simplification-with-absolute-value
I have a long expression that has absolute values in the exponent. Some parts of the expression would clearly simplify if one assumes that the power is an odd or even integer. When I give one of this ...
- asked by Jools (1 vote)
—————————-
[Wrong Limit with LaguerreL] http://mathematica.stackexchange.com/questions/84077/wrong-limit-with-laguerrel
Limit[(n!LaguerreL[n,-1]/(n^(n+1/4)/Sqrt[2]/E^(n-2Sqrt[n]+1/2))-1)Sqrt[n],n->\[Infinity]]
Mathematica (wrong) output
13/16 = 0.8125
The right result is:
31/48 = 0.645833...
But numerically it ...
- asked by Vaclav Kotesovec (5 votes)
—————————-
[Fast construction and reshaping of large tensors]http://mathematica.stackexchange.com/questions/83999/fast-construction-and-reshaping-of-large-tensors
I’m trying to construct a large matrix which is derived from some higher rank tensor (the rank of interest to me changes case by case, so it needs to be a general method). Currently, the process of ...
- asked by user12876 (1 vote)