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Apr
6
revised Sketch-type graphics with transparency and dashed hidden lines?
higher-quality results with oversampling and dilation
Apr
6
revised Sketch-type graphics with transparency and dashed hidden lines?
edited body
Apr
6
answered Sketch-type graphics with transparency and dashed hidden lines?
Apr
1
comment Vary the thickness of a plotted function
One interesting property of this approach is that the colouring is also "rounded". Compare i.stack.imgur.com/4zmXK.png and i.stack.imgur.com/s4O0j.png, where the only difference is reversing the order of points. Note the shape of the green/orange transition.
Mar
31
awarded  Civic Duty
Mar
31
comment Reconstructing an image from overlapping patches
Unfortunately your result is smaller than the original image, so even without considering overlapping patches it's not really the inverse of the ImagePartition operation.
Mar
29
comment 3D plots with a continuous and discrete input
@Sigur: The second example will do the job; just replace the RegionFunction $z<f(a,x)$ with your implicit equation.
Mar
29
comment Morphological Components with periodic boundary conditions
This looks very nice! But it seems you're only considering periodicity in the vertical direction. Going by the second example in the question, the OP wants both the horizontal and the vertical boundaries of the image to be periodic.
Mar
29
comment Morphological Components with periodic boundary conditions
As it turns out, MorphologicalComponents does take a Padding option, but Padding -> "Periodic" does not work.
Mar
29
comment Morphological Components with periodic boundary conditions
@David: I think he just wants the grid to be treated as periodic, so that a cell adjacent to the top edge and a cell adjacent to the bottom edge with the same horizontal coordinate should be connected (and similarly for the left and right edges). In this example, the five-cell dark blue component and the two-cell purple component in the top middle-left should both be parts of the large orange component at bottom left.
Mar
28
revised Fitting to a sigmoidal model
added 1400 characters in body
Mar
28
revised Interpolation and points of non-differentiability
answer to edited question, prompted by @Kuba
Mar
28
comment 3D plots with a continuous and discrete input
Actually I think this is a duplicate of Plotting several functions. Heike's answer there is the same as the one I posted here.
Mar
27
answered 3D plots with a continuous and discrete input
Mar
26
revised Modular surface of tri-focal cassini curve ContourPlot3D missing feet
added 530 characters in body
Mar
26
answered Modular surface of tri-focal cassini curve ContourPlot3D missing feet
Mar
26
comment Modular surface of tri-focal cassini curve ContourPlot3D missing feet
@Kuba: You took 4 seconds to write a better explanation of the sampling problem. :)
Mar
26
comment Modular surface of tri-focal cassini curve ContourPlot3D missing feet
It's a sampling issue; you could try increasing PlotPoints or MaxRecursion. But why not apply Plot3D to $|c(x+iy)|^{1/3}$ instead? It'll be much faster, and then you can increase MaxRecursion to like 5 and get a really nice plot very quickly.
Mar
26
revised Specific entry of inverse of large matrix
added 12 characters in body
Mar
26
comment Solving a system of 4 logarithmic equations?
I'm just curious why you posted an answer that finds a non-solution eight hours after RiemannZeta already proved that there are no solutions.