6,154 reputation
11542
bio website
location
age
visits member for 2 years, 5 months
seen 4 mins ago

4h
comment Express a complex function $f(z)$ as $u(x,y)+iv(x,y)$
Previously: Extract real part of a complex expression better than Re does, Does the Im function work with symbolic arguments?, How to simplify my expression to the style of “a+b*I”?. I probably should have searched for duplicates before posting my answer.
4h
answered Express a complex function $f(z)$ as $u(x,y)+iv(x,y)$
4h
revised Manipulate gives the output as a blank plot, but I'm not sure why
replace \[Alpha], \[Pi] with Greek letters
12h
comment Is there a function for nearest power of 2 in Mathematica like nextpow2 in MATLAB?
@Mr.Wizard Do you know if the v10 syntax is documented anywhere? Searching for @* in the documentation turns up nothing.
13h
comment Piecewise Polynomial Interpolation
Ah, right, one can't do the last example with Partition. In the original question the degree is constant, though, so Partition should be sufficient. +1 for the Piecewise and InterpolationOrder -> All.
13h
comment Piecewise Polynomial Interpolation
Instead of split can't you just do Partition[list, r+1, r]?
1d
comment Zero-order interpolation not going fully around
I think you ought to keep first-order interpolation and ask a question about how to get rid of the visual artifacts.
1d
comment Undirected Network and its Monte Carlo Simulation
"I want to connect the network like it originally was." If all you have are the coordinates of the points, how can anyone possibly know what the network originally was?
1d
comment What is that Root[…] inside the answer represent?
A polynomial of degree 5 has up to five roots. $k=1$ means take the first one. For example, Root[#^2 - 100 &, 1] is $-10$, and Root[#^2 - 100, 2] is $10$.
2d
comment How Construct Clopen-Compact Bitopological Spaces?
I don't think this is a question about the Wolfram Mathematica software...
2d
awarded  Enlightened
2d
awarded  Nice Answer
2d
answered How can I mend this broken heart?
Jul
24
comment How to generate nonperiodic tilings?
Apparently the rt1s end up forming some of the dominoes and the rt2s end up forming the kites and the rest of the dominoes.
Jul
23
comment Is there a way to recreate the typical Red/Blue-Postereffect using Mathematica?
@blochwave, kale: I find that running Colorize on TotalVariationFilter@Sharpen@image works pretty well.
Jul
23
comment Is there a way to recreate the typical Red/Blue-Postereffect using Mathematica?
Half the reason I didn't post an answer was so that I wouldn't have to bother making the colours look good! So please, do direct any and all complaints towards @acl. Indeed, that blue is terrible, acl, what on earth were you thinking?!
Jul
23
comment Is there a way to recreate the typical Red/Blue-Postereffect using Mathematica?
@acl ColorFunction -> (Piecewise[{{Darker@Blue, # < 0.5}, {Red, # < 0.67}, {Darker@LightBlue, # < 0.75}, {LightYellow, True}}] &)
Jul
23
comment Using least independent rectangle area to separate every point
I thought @Kuba had something like this in mind: nf = Nearest[Table[data[[i]] -> i, {i, Length@data}], DistanceFunction -> ChessboardDistance]; Colorize@Table[First@nf@{x, y}, {y, 0.03, -0.03, -0.0001}, {x, -0.05, 0.03, 0.0001}] but it doesn't work that well: i.stack.imgur.com/T22XL.png
Jul
21
comment An easier way to find the properties of an ellipse from its equation?
I feel like the central question, "What is an intuitive way to find the major axis, minor axis, center, and rotation of an ellipse from its given quadratic equation?", is one better suited for the mathematics StackExchange. Once you have the mathematics, it should be short work to implement it in Mathematica.
Jul
21
comment Probable Bug in ConvexHullMesh
I can reproduce this on OS X as well.