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Mar
10
comment How can I make a pretzel shape using bezier curves?
You'll have better luck if you make your control polygon have three-fold symmetry.
Mar
10
awarded  Nice Answer
Mar
4
comment Determine if all the zeros in a list occur at the end
Is the speed the same if you define test5 = OrderedQ @* Reverse @* Unitize?
Mar
3
comment How to draw a particular contour line in ListDensityPlot?
ListDensityPlot[..., MeshFunctions -> {#3 &}, Mesh -> {{0.8}}]
Feb
28
comment How to find soccer balls in an image?
After the update the problem is suddenly much much much harder.
Feb
25
comment How to generate mesh and calculate volume of 3d object?
How did you generate the last plot?
Feb
25
comment How to generate mesh and calculate volume of 3d object?
Sorry, maybe there's something I'm missing, but why can't you just keep using your NIntegrate[ρ^2 Sin[θ], ...] method?
Feb
24
comment Can someone explain this snippet: (#[#] &)[#[#][#] &]
Rather than the Y combinator, it looks to me like a variant of the standard example of a lambda calculus expression with no normal form: $(\lambda x.xx)(\lambda x.xx)$. This one has three $x$s in the second term.
Feb
23
comment Random geometrical graph generation
In the interest of teaching a man how to fish: Check out the documentation for Graph, under Examples > Scope > Styling. The first example there demonstrates VertexStyle and EdgeStyle.
Feb
18
comment Is Mathematica `ContourPlot` function really so efficient?
You could do something like Table[{x, y} /. NSolve[f[x, y] == 0 && 0 <= y <= 10, y, Reals], {x, 0, 10, 0.1}]. The difference in speed is because NSolve tries to get all roots with machine-precision accuracy, about $10^{-16}$, whereas ContourPlot is content with much lower accuracy and possibly missing some roots.
Feb
11
awarded  Yearling
Feb
9
revised Plotting self-made functions
added 6 characters in body
Feb
9
answered Plotting self-made functions
Feb
9
comment Define a function with variables linked implicitly
@fanshenry: Sorry, I took "Eventually I would like to draw a graph" to mean that drawing the graph was your end goal. To define the function itself, you can try using Solve or NSolve or use Michael E2's method. When I have some more time, I'll edit my answer to explain the use of MeshFunctions, but in the meantime you could look at the documentation.
Feb
9
comment Define a function with variables linked implicitly
Related: mathematica.stackexchange.com/q/34092/484
Feb
9
answered Define a function with variables linked implicitly
Feb
9
comment How to plot feasible objective space of a Generic Multiobjective Optimization problem?
Can you give the definition of "feasible design space of objective functions" for those of us not intimately familiar with multiobjective optimization terminology?
Feb
9
comment How to make a cylinder with bottom that shows hidden part of edge as dashed curve
Oh man, that ViewPoint -> Dynamic[vp] trick is neat. I know I'm going to be using that in the future.
Feb
7
comment Modifying Game of Life code so that the lattice can be seeded with life forms
@belisarius: I don't think "be ignorant of" is one of the meanings of the verb "ignore"...
Feb
6
comment Efficient Lloyd Sampling of Images
Apparently the weighted CVT works pretty well nevertheless. See the paper "Weighted Voronoi stippling" by Adrian Secord, which I think you will find quite interesting and relevant.