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Aug
18
comment Transparency in a 3D plot
You're trying to specify PlotStyle twice, which doesn't work (the second one is ignored). Use Directive to combine them instead: PlotStyle -> Directive[RGBColor[1., 0.9, 0.14], Opacity[0.9]]
Aug
15
revised Extending a ternary plot to a tetrahedron (using ListPlot)
added 80 characters in body
Aug
15
comment How to “merge” various graphics 2d into one 3d graphic?
Can you give some more details on how you generated the 2D graphics?
Aug
14
comment How to make a stereogram in Mathematica? (2)
There's a line in Simon Woods's code involving Accumulate which I don't see in your implementation.
Aug
12
comment Delaunay Triangulation for 3D Surface Data
Isn't the boundary of the Delaunay tetrahedralization just the convex hull of the data, which can be found in much more straightforward ways?
Aug
11
comment how do I plot this surfaces in 2-D?
+1, but the condition is $x^TAx+1\le0$, not $x^TAx>0$.
Aug
7
comment Plotting in projective space
Not sure what you mean by "convert this to the projective plane". Can you give an example of what you want the plot to look like in the end?
Aug
4
comment How to make a region plot indicating the largest among a set of functions
Isn't this question an almost exact duplicate of the one you linked to?
Aug
3
comment Plotting an implicit polar equation
@RunnyKine: Is it really necessary to bump a question to the front page just to italicize the word Mathematica?
Jul
31
revised How to plot stability region of Fourier analysis
added 304 characters in body
Jul
31
answered How to plot stability region of Fourier analysis
Jul
31
revised Fourier Analysis: How to get rid of a discontinuity
missing definition causing errors
Jul
31
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).
Jul
30
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
Jul
29
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.
Jul
29
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.
Jul
29
answered Express a complex function $f(z)$ as $u(x,y)+iv(x,y)$
Jul
29
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.