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13h
revised How to plot stability region of Fourier analysis
added 304 characters in body
14h
answered How to plot stability region of Fourier analysis
14h
revised Fourier Analysis: How to get rid of a discontinuity
missing definition causing errors
14h
comment Fourier Analysis: How to get rid of a discontinuity
@Flymath: Ah, the problem is that one needs to "unwrap" the result of ArcTan before dividing by $\sigma\phi$. In this case it is apparently enough to just define g[σ_Real, ϕ_Real] = (If[# < 0, # + 2 π, #] &)@-ArcTan[Re[Ztri], Im[Ztri]]/(σ*ϕ).
1d
comment Automatically lining up two images that have some common elements
If this weren't a Mathematica-specific site I would suggest a simple manual technique using two minutes of Photoshop: i.stack.imgur.com/5Lm3z.jpg
2d
comment Is it possible to plot a second-order curve by its non-canonical equation?
Look up ContourPlot. Also, you need a space between x and y, otherwise it denotes a different variable named xy.
2d
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.
2d
answered Express a complex function $f(z)$ as $u(x,y)+iv(x,y)$
2d
revised Manipulate gives the output as a blank plot, but I'm not sure why
replace \[Alpha], \[Pi] with Greek letters
Jul
28
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.
Jul
28
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.
Jul
28
comment Piecewise Polynomial Interpolation
Instead of split can't you just do Partition[list, r+1, r]?
Jul
28
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.
Jul
28
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?
Jul
28
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 $10$.
Jul
27
comment How Construct Clopen-Compact Bitopological Spaces?
I don't think this is a question about the Wolfram Mathematica software...
Jul
27
awarded  Enlightened
Jul
26
awarded  Nice Answer
Jul
26
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.