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Nov
18
awarded  Enlightened
Nov
18
awarded  Nice Answer
Nov
18
comment How can I use Mathematica to numerically compute a Wigner spectrogram of an optical pulse?
If you want a spectrogram, you could also consider ContinuousWaveletTransform.
Nov
18
comment Control the color of contours
Have you considered plotting a ContourPlot in log scale, that is, plotting the log of your data?
Nov
18
answered How to make a blob in 3D?
Nov
14
comment Superimposing plots
Oh, so by "plots" you meant "functions"? f[x_] is not a plot, it is a function. A plot is a picture that depicts the function.
Nov
14
comment How to calculate a list without loop?
{as, bs} = Transpose[pairs]; result = Transpose[{as, Accumulate[bs]}]
Nov
14
comment Minimal perimeter of all possible polygons
FindShortestTour
Nov
13
comment Find parameters that minimize the distance between two curves in terms of the infinite norm
Belisarius is correct, the optimal quadratic fit is the constant zero function, whose infinity-norm distance from $v(x)$ is 1. For a function $f(x)$ to have distance less than that, it would have to be negative at $x=0$, positive at $x=1/2$, negative at $x=\sqrt3/2$, and positive at $x=1$ (because those are the extrema of $v(x)$ on $[0,1]$: i.stack.imgur.com/zLP5g.png). This is impossible if $f(x)$ is quadratic.
Nov
12
comment Why does Mathematica give this ArcSin[2] result?
Wow, what an answer! +++1
Nov
5
comment Heron's Method of Square Root Calculation Issue with Previous Suggestion
Did you know that $27.5265 \ne 27.5625$?
Nov
4
comment How could I solve this Reaction-Diffusion PDE using mathematica?
Take a look at NDSolve and NeumannValue.
Nov
4
answered ListDensityPlot in Polar coordinates with a higher efficiency
Nov
4
comment Filter two lists of 2D coordinates such that only those that have a nearby neighbour in the other list are collected
@Karsten7.: Won't that produce duplicate copies of any red point is within 10 units of two green points (and vice versa)?
Nov
2
awarded  Good Question
Nov
2
awarded  Nice Answer
Nov
2
comment How to plot several small circles in a bigger circle
You can get the code by clicking "Download Author Code" on the right. But it doesn't do any constrained minimization, it just gets the circle positions from a big hard-coded list that looks like circlelist = N[1/10^16 {{{0, 0}}, {{10000000000000000, 0}, {-10000000000000000, 0}}, {{0, 11547005383792515}, {-10000000000000000, -5773502691896258}, {10000000000000000, -5773502691896258}}, ...}
Oct
31
comment Coloring spiral structures
I wonder if some of the answers to this previous question may be useful.
Oct
30
comment How to plot a figure according to two equations?
You can think of the two equations as surfaces $f(x,y)=a$ and $g(x,y)-z=0$ in $(x,y,z)$-space and then use the answer to this question: mathematica.stackexchange.com/q/5968/484
Oct
30
revised A method to draw a surface around a set of regularly spaced points
added 341 characters in body